CN102401949A - Optical fiber coupling module of platform-type turning and reflecting single-tube semiconductor laser - Google Patents
Optical fiber coupling module of platform-type turning and reflecting single-tube semiconductor laser Download PDFInfo
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- CN102401949A CN102401949A CN2011103946488A CN201110394648A CN102401949A CN 102401949 A CN102401949 A CN 102401949A CN 2011103946488 A CN2011103946488 A CN 2011103946488A CN 201110394648 A CN201110394648 A CN 201110394648A CN 102401949 A CN102401949 A CN 102401949A
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Abstract
The invention provides an optical fiber coupling module of a platform-type turning and reflecting single-tube semiconductor laser and belongs to the technical field of laser; the optical fiber coupling module comprises a bearing platform (1), a plurality of groups of single-tube semiconductor lasers (2), a plurality of fast axis collimators (3), a plurality of slow axis collimators (4), a plurality of turning and reflecting prisms (5), an ordinary reflecting prism (7), a beam-combining prism (8), and fast/slow axis focusing lens combinations (9) and (10) and an optical fiber coupling head (12); each group of the single-tube semiconductor lasers comprises a plurality of the single-tube semiconductor lasers; each single-tube semiconductor laser corresponds to one fast axis collimator, one slow axis collimator and one turning and reflecting prism; all the optical devices are laid on the bearing platform without steps and pedestals; the light-emitting positions of the single-tube semiconductor lasers are located at the same height; the light beams emitted by the single-tube semiconductor lasers are subjected to the collimation, turning and reflection, beam-combination and focusing processes through the optical devices and finally are coupled to the optical fiber coupling head.
Description
Technical field
The present invention relates to laser technology field, relate in particular to a kind of platform-type reflection single tube semiconductor laser fiber coupling module of turning back.
Background technology
High power semiconductor lasers has a series of advantages such as output power height, volume are little, in light weight, long working life, electro-optical efficiency height, and has obtained widespread use in every field such as light-pumped solid state laser, direct material processing, communication, medical treatment.But, make it be difficult to be applied in the demanding occasion for beam quality at some because high power semiconductor lasers self is also being deposited problems such as beam quality difference.
The single tube high power semiconductor lasers that commercialization is at present produced goes out luminous power and has reached more than the 10W magnitude, but also there is a big difference apart from the needs of some practical applications.For further improving the output power of high power semiconductor lasers; And make it have higher beam quality, be applied to more conditions; The researchist usually selects with a plurality of semiconductor laser assembled arrangement together, forms the structure of linear array, face battle array or folded battle array, carries out the mode of spatial array then through the light to each semiconductor laser output; Focus on coupled into optical fibres, thereby realize the high-power output of high light beam quality.
Several kinds of technical schemes that current semiconductor laser fiber coupling technique is commonly used have:
1 uses single semiconductor laser fragrant plant bar, carries out optical fiber coupling output;
2 spatially make up a plurality of semiconductor laser fragrant plant bar output beams, arrange, and then close the mode that bundle or wavelength close bundle through polarization and further improve power, realize optical fiber output;
3 spatially make up a plurality of single tube semiconductor laser output beams, arrange, and then close the mode that bundle or wavelength close bundle through polarization and further improve power, realize optical fiber output;
In the above scheme, 1 defective is for using single fragrant plant bar, and output power is lower.And 2,3 schemes are often used the step base construction in order to obtain the spatial array of light beam, are about to each laser instrument and place on the highly different pedestals.This can cause the heat conduction path relative complex of each laser instrument, and the heat radiation lack of homogeneity is prone to cause that temperature floats effect, and each laser works consistance variation, spectrum width are increased, and is unfavorable for using; The step base construction also exists problems such as difficulty of processing is big, cost height simultaneously.Another defective that step base construction in 2,3 schemes of use carries out the multiple beam combination is; The quick shaft direction of light keeps vertical with the step plane all the time; Needing only each bench height like this fixes; Spacing is constant, and the slow axis spacing of each light beam (that is folded battle array goes up the difference in level of each laser instrument) is also fixed, and is difficult to change.If design unreasonable or have mismachining tolerance early stage, its beam separation is difficult to adjustment, thereby focusing is had a negative impact, and reduces final coupling efficiency.In addition; In semiconductor laser optical fiber coupling, the introducing of fragrant plant bar structure usually can make the life-span of integral module reduce because the fragrant plant bar by a plurality of luminous single tubes be integrated in one heat sink on; Its heat dispersion is subject to the quantity of single tube; Quantity is many more, and heat dispersion is poor more, and the mission life of fragrant plant bar is also just short more.
Therefore, need a urgent technical matters that solves to be exactly instantly: how can propose a kind of effective measures, to solve the problem that exists in the prior art.
Summary of the invention
Technical matters to be solved by this invention provides a kind of platform-type reflection single tube semiconductor laser fiber coupling module of turning back, shortcoming such as overcome effectively that the heat dispersion that exists in the semiconductor laser optical fiber coupling scheme is inconsistent, the life-span short, debug difficulties and coupling efficiency are low.
In order to solve the problems of the technologies described above; The invention provides a kind of platform-type reflection single tube semiconductor laser fiber coupling module of turning back, comprise carrying platform (1), array single tube semiconductor laser (2), several fast axis collimation mirrors (3), slow axis collimating mirror (4), several reflecting prisms of turning back (5), common reflecting prism (7), beam cementing prism (8), the combination of fast and slow axis focus lamp (9) and (10) and optical fiber coupling head (12); Every group of single tube semiconductor laser contains several single tube semiconductor lasers; Each single tube semiconductor laser (2) corresponding a fast axis collimation mirror (3), a slow axis collimating mirror (4) and the reflecting prism of turning back (5); Above-mentioned each optical device all lies in no step not to be had on the carrying platform of pedestal (1), and the height at the luminous place of each single tube semiconductor laser is consistent, and the light beam that the single tube semiconductor laser sends is realized collimation through fast axis collimation mirror and slow axis collimating mirror; Reflecting prism and common reflecting prism realize turning back reflection through turning back; Realize closing bundle through beam cementing prism, after the combination of fast and slow axis focus lamp realizes focusing on, finally be coupled in the optical fiber coupling head.
Further, the path that the light beam that said single tube semiconductor laser sends arrives before the beam cementing prism is: after the reflecting prism reflection of turning back, carry out primary event through common reflecting prism again, get into beam cementing prism afterwards; Or after the reflecting prism reflection of turning back, directly get into beam cementing prism.
Further, the arrangement mode between the described m group single tube semiconductor laser can select to be arranged in parallel, homeotropic alignment and the combination with homeotropic alignment of being arranged in parallel.
Further, said single tube semiconductor laser comprises laser chip and heat sink two parts.
Further; The said reflecting prism of turning back contains two reflectings surface; Two reflectings surface become 45 with the carrying platform plane respectively on orthogonal both direction; After light beam carried out two secondary reflections, 90 ° of deflections took place in the direction of propagation of light, and the slow-axis direction of light is from becoming vertical with the carrying platform plane with the carrying platform plane parallel.
Further, said common reflecting prism is the triangle reflecting prism, or plane mirror.
Further, said beam cementing prism is the polarization beam cementing prism, or the wavelength beam cementing prism.
Further, the mode of described fast and slow axis focus lamp combination is: select the combination of fast axle focus lamp and slow axis focus lamp for use, realize the focusing respectively to fast axle of laser beam and slow-axis direction; Or select single convex lens or convex lens combination for use, realize fast axle of laser beam and the unified of slow-axis direction are focused on.
Further, the span of described m is 1～20.
Further, the span of described n is 1～30.
To sum up; The platform-type reflection single tube semiconductor laser fiber coupling module of turning back that the invention provides; Through selecting the single hose semiconductor laser for use, and carry out platform-type distribution, obtained some fragrant plant stripe shape semiconductor lasers and the conventional step not available advantage that distributes.The use of single hose semiconductor laser can make the working current of system less relatively, usually below 15A; Because the light-emitting zone width of single tube semiconductor laser is littler, usually about 100 μ m, can light beam is convenient, simply, coupled into optical fibres efficiently; Simultaneously,, can make the radiating effect of single laser instrument reach optimum, guaranteed that it moves under optimum temperature because one only welded a laser chip on heat sink, so promoted module whole heat dispersion, and prolong the overall operation life-span of system greatly.In addition; This module is positioned over no step with all single tube semiconductor laser unifications not to be had on the platform of pedestal; The level height at each luminous place of laser instrument is consistent, and system construction is simple, and each semiconductor laser has the heat transfer path and the radiating effect of the unanimity of being close to; Can effectively avoid making the output power of each semiconductor laser in the system and output wavelength keep high stability and consistance owing to the inhomogeneous temperature that causes of heat radiation is floated effect.
In addition,, can realize the spatial movement of light beam, make to regulate to become very convenient, reduce assembling and debug time greatly, also help the coupling efficiency that reaches higher through the reflecting prism translation motion in the plane of turning back.
Description of drawings
Fig. 1 is the three-dimensional view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment one that turns back;
Fig. 2 is the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment one that turns back;
Fig. 3 is the three-dimensional view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment two that turns back;
Fig. 4 is the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment two that turns back;
Fig. 5 is the three-dimensional view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment three that turns back;
Fig. 6 is the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment three that turns back;
Fig. 7 is the three-dimensional view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment four that turns back;
Fig. 8 is the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module embodiment four that turns back;
Fig. 9 is the turn back structure of reflecting prism and the synoptic diagram of working.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Comprehensive explanation, among Fig. 1 to Fig. 8,1, carrying platform, 2, the single tube semiconductor laser, 3, the fast axis collimation mirror; 4, slow axis collimating mirror, 5, the reflecting prism of turning back, 6, the polarization slide, 7, common reflecting prism; 8, beam cementing prism, 9, fast axle focus lamp, 10, the slow axis focus lamp, 11, convex lens; 12, optical fiber coupling head, 13, electrode connecting piece, 14, the spun gold lead-in wire, 15, power supply lead wire; Among Fig. 9, the slow-axis direction of I, Laser Output Beam, II, first secondary reflector, III, secondary reflection face, VI, the light beam slow-axis direction after turning back.
In the scheme; A kind of platform-type reflection single tube semiconductor laser fiber coupling module of turning back comprises carrying platform (1), array single tube semiconductor laser (2), several fast axis collimation mirrors (3), slow axis collimating mirror (4), several reflecting prisms of turning back (5), common reflecting prism (7), beam cementing prism (8), the combination of fast and slow axis focus lamp (9) and (10) and optical fiber coupling head (12); Every group of single tube semiconductor laser contains several single tube semiconductor lasers; Each single tube semiconductor laser (2) corresponding a fast axis collimation mirror (3), a slow axis collimating mirror (4) and the reflecting prism of turning back (5); Above-mentioned each optical device all lies in no step not to be had on the carrying platform of pedestal (1), and the height at the luminous place of each single tube semiconductor laser is consistent, and the light beam that the single tube semiconductor laser sends is realized collimation through fast axis collimation mirror and slow axis collimating mirror; Reflecting prism realizes turning back reflection through turning back; Realize closing bundle through common reflecting prism and beam cementing prism, after the combination of fast and slow axis focus lamp realizes focusing on, finally be coupled in the optical fiber coupling head.
Further, the path that the light beam that said single tube semiconductor laser sends arrives before the beam cementing prism is: after the reflecting prism reflection of turning back, carry out primary event through common reflecting prism again, get into beam cementing prism afterwards; Or after the reflecting prism reflection of turning back, directly get into beam cementing prism.
Further, the arrangement mode between the described m group single tube semiconductor laser can select to be arranged in parallel, homeotropic alignment and the combination with homeotropic alignment of being arranged in parallel.
Further, said single tube semiconductor laser comprises laser chip and heat sink two parts.
Further; The said reflecting prism of turning back contains two reflectings surface; Two reflectings surface become 45 with the carrying platform plane respectively on orthogonal both direction; After light beam carried out two secondary reflections, 90 ° of deflections took place in the direction of propagation of light, and the slow-axis direction of light is from becoming vertical with the carrying platform plane with the carrying platform plane parallel.
Further, said common reflecting prism is the triangle reflecting prism, or plane mirror.
Further, said beam cementing prism is the polarization beam cementing prism, or the wavelength beam cementing prism.
Further, the mode of described fast and slow axis focus lamp combination is: select the combination of fast axle focus lamp and slow axis focus lamp for use, realize the focusing respectively to fast axle of laser beam and slow-axis direction; Or select single convex lens or convex lens combination for use, realize fast axle of laser beam and the unified of slow-axis direction are focused on.
Further, the span of described m is 1～20.
Further, the span of described n is 1～30.
Embodiment one
Referring to Fig. 1 and Fig. 2, be respectively the three-dimensional view and the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module of turning back among the embodiment one.In the present embodiment, the m value is 2, and the n value is 6, and promptly present embodiment contains two groups of high power semiconductor lasers, and every group each is made up of 6 single tube semiconductor lasers; In addition, the scheme of having taked polarization beam cementing prism 8 and polarization slide 6 polarizations to close bundle; And the scheme that 11 pairs of laser beams of convex lens of having selected to polish with a periphery are fast, slow axis is unified to focus on; In addition,, selected mode, used a common reflecting prism 7 that the light that group single tube semiconductor laser of left among Fig. 1 sends has been reflected into polarization beam cementing prism 8 two groups of parallel placements of laser instrument for simplified structure; And the common reflecting prism in the present embodiment 7 is a triangle reflecting prism.Among Fig. 1 and Fig. 2, every group of each interior single tube semiconductor laser all lies on the carrying platform, and level height is consistent; The electrode of each semiconductor laser is together in series through spun gold lead-in wire 14 in the group, and through electrode connecting piece 13 serial connections, whole module is connected with power supply through power supply lead wire 15 between group; The equal keeping parallelism of light output end of each semiconductor laser in the group, but their the pairing reflecting prism of turning back but is staggered, and is not blocked to guarantee the light that each laser instrument sends.
Among Fig. 1 and Fig. 2, power supply lead wire 15 is received power supply, to after the module energising, the 2 beginning bright dippings of single tube semiconductor laser, but its fast axle of the light that sends this moment, the slow axis angle of divergence are all bigger, need on the fast and slow axis direction, collimate respectively.Therefore the light that sends at first will pass through fast axis collimation mirror 3, slow axis collimating mirror 4 among Fig. 1 and Fig. 2, to obtain little beam divergence angle.Similarly, the light beam of other single tube semiconductor laser has also all passed through collimation, and the angle of divergence diminishes.Afterwards, the light that sends of each single tube semiconductor laser can be through the conversion of reflecting prism 5 travel directions of turning back.This direction transformation process is as shown in Figure 9, and before reflecting prism was turned back in entering, its slow-axis direction was shown in I among Fig. 9 by the light after the collimation, and level is in the carrying platform plane.Treat that light gets into after the prism, at first carried out primary event by first secondary reflector II among Fig. 9,90 ° of deflections take place in the direction of light beam, become straight up and advance.Then light beam projects among Fig. 9 on the secondary reflection mirror III, and 90 ° of deflections have taken place again, becomes to the right and propagates, and its slow-axis direction shown in VI among Fig. 9 deflection has taken place also simultaneously, has become vertical with the carrying platform plane.
Light after the reflecting prism 5 of turning back is turned back continues to advance.In Fig. 1 and Fig. 2, each reflecting prism of turning back is staggeredly placed, and therefore can make the light of respectively restrainting after reflecting prism 5 reflections of turning back keep a determining deviation, and parallel the continuation to the right advanced.The light of that group semiconductor laser on Fig. 1 and Fig. 2 meta offset left side propagates into after the common reflecting prism 7; Be reflected in the polarization beam cementing prism 8; On the reflection of polarization face of polarization beam cementing prism 8, be reflected again, planoconvex lens 11 afterwards, and quick shaft direction and slow-axis direction all are focused; Light beam has become a very little hot spot, gets into optical fiber coupling head 12.Meanwhile; Severals Shu Guangjing of that group semiconductor laser that Fig. 1 and the offset of Fig. 2 meta are right turn back after reflecting prism turns back, and pass through polarization slide 6 earlier, and the variation of certain angle has taken place the polarisation of light degree; Directly get into polarization beam cementing prism 8 afterwards again; And after through the plane of polarization in the polarization beam cementing prism 8, close bundle with light generation polarization of that group semiconductor laser of taking back from the position, after this take back light beam of that group semiconductor laser of its light beam travel path and position almost overlaps, after planoconvex lens 11 focusing; Form very little hot spot at the same position place, be coupled into optical fiber coupling head 12.
In the assembling and setting process of laser instrument, the light that each laser instrument sends can be arranged on the quick shaft direction that is parallel to the carrying platform plane after the reflecting prism reflection of turning back.This moment can be through the reflecting prism translation motion in the plane of turning back; Realize the spatial movement of light beam, the spacing of each light beam on quick shaft direction changed, and then adjust to optimum condition; Not only can reduce debug time greatly, also can be with the high efficiency coupled into optical fibres of light beam.Simultaneously because the whole horizontal positioned of each laser instrument, no step base construction, its heat dispersion is close to unanimity, goes out luminous power, goes out optical wavelength and all keeping highly consistance.
Embodiment two
Referring to Fig. 3 and Fig. 4, be respectively the three-dimensional view and the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module of turning back among the embodiment two.In the present embodiment; The m value is that the laser array number is 2; Identical with embodiment one, but every group of number n that contains the single tube semiconductor laser is 7, and the arrangement mode of two groups of single tube semiconductor lasers is different with embodiment one; The vertical centering control separated time that has become with the berm width direction is the center, being arranged in parallel of symmetrical expression; The polarization that present embodiment has still been selected to contain polarization slide 6, common reflecting prism 7 and polarization beam cementing prism 8 closes the bundle scheme; And in the selection of common reflecting prism 7, still selected a triangle reflecting prism for use; But the focusing coupling scheme of present embodiment adopts is a fast axle focus lamp 9, a slow axis focus lamp 10, the mode that respectively beam fast axis direction and slow-axis direction is focused on respectively.
Groundwork flow process and the embodiment one of embodiment two are similar.Among Fig. 3 and Fig. 4, power supply lead wire 15 is being received power supply, to after the module energising, the 2 beginning bright dippings of single tube semiconductor laser, but its fast axle of the light that sends this moment, the slow axis angle of divergence are all bigger, need on the fast and slow axis direction, collimate respectively.Therefore the light that sends at first will pass through fast axis collimation mirror 3, slow axis collimating mirror 4 among Fig. 3 and Fig. 4, to obtain little beam divergence angle.Afterwards, the light that sends of each single tube semiconductor laser can be through reflecting prism 5 conversion of travel direction again of turning back.Fast axle, the slow-axis direction conversion process of this light beam are identical with embodiment one.
Light after the reflecting prism 5 of turning back is turned back continues to advance.In Fig. 3 and Fig. 4, each reflecting prism of turning back is staggeredly placed, and the light of respectively restrainting that therefore can use the reflecting prism 5 of turning back keeps a determining deviation, and parallel the continuation to the right advanced.The light that is positioned at that group semiconductor laser of below among Fig. 3 and Fig. 4 propagates into after the common reflecting prism 7; Be reflected in the polarization beam cementing prism 8; On the reflection of polarization face of polarization beam cementing prism 8, be reflected again; Again through fast axle focus lamp 9 and slow axis focus lamp 10, be focused into very little hot spot afterwards, get into optical fiber coupling head 12.Meanwhile; The light of that group semiconductor laser in Fig. 1 and the offset of Fig. 2 meta through polarization slide 6, makes the polarisation of light degree that the variation of certain angle take place earlier after the reflecting prism of turning back is turned back; Directly get into polarization beam cementing prism 8 afterwards again; And after through the plane of polarization in the polarization beam cementing prism 8, close bundle with light generation polarization of that group semiconductor laser of taking back from the position, after this its light beam travel path almost overlaps with light beam of that group semiconductor laser on the lower side, after fast focus lamp 9,10 focusing of slow axis focus lamp; Form very little hot spot at the same position place, be coupled into optical fiber coupling head 12.
Embodiment three
Referring to Fig. 5 and Fig. 6, be respectively the three-dimensional view and the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module of turning back among the embodiment three.Except that the light beam focusing block of module, present embodiment and embodiment one are basic identical: the m value is that the laser array number is 2, and every group of number n that contains the single tube semiconductor laser is 6, and the arrangement mode of two groups of single tube semiconductor lasers is parallel being staggeredly placed; The polarization that present embodiment has still been selected to contain polarization slide 6, common reflecting prism 7 and polarization beam cementing prism 8 closes the bundle scheme; And in the selection of common reflecting prism 7, still selected a triangle reflecting prism for use; Present embodiment and embodiment one unique difference be, the focusing coupling scheme of present embodiment has adopted the combined mode of fast axle focus lamp 9 and slow axis focus lamp 10, to realize the focusing respectively to beam fast axis direction and slow-axis direction.
Before too fast axle focus lamp 9 and slow axis focus lamp 10 focused on, the groundwork flow process of embodiment three was identical with embodiment one at light beam.When giving single tube semiconductor laser 2 energisings of present embodiment through power supply lead wire 15, each single tube semiconductor laser begins bright dipping, and the light that sends at first passes through fast axis collimation mirror 3, slow axis collimating mirror 4, has obtained little beam divergence angle.Afterwards, the light that sends of each single tube semiconductor laser can be through the conversion of reflecting prism 5 travel directions of turning back.Afterwards, through polarization slide 6, common reflecting prism 7 and polarization beam cementing prism 8, the light that two groups of single tube semiconductor lasers are sent closes bundle.Close light behind the bundle through fast axle focus lamp 9, slow axis focus lamp 10, after the focusing respectively that realizes beam fast axis and slow axis, be coupled into optical fiber coupling head 12, obtain optical fiber and export.
Embodiment four
Referring to Fig. 7 and Fig. 8, be respectively the three-dimensional view and the vertical view of the platform-type reflection single tube semiconductor laser fiber coupling module of turning back among the embodiment four.Except that final focusing scheme; Present embodiment and embodiment two are basic identical: the m value is that the group number of laser instrument is 2; Every group of number n that contains the single tube semiconductor laser is 7, two groups of single tube semiconductor lasers with the vertical centering control separated time of berm width direction is the center, being arranged in parallel of symmetrical expression; The polarization that present embodiment has still been selected to contain polarization slide 6, common reflecting prism 7 and polarization beam cementing prism 8 closes the bundle scheme; And in the selection of common reflecting prism 7, still selected a triangle reflecting prism for use; Present embodiment is that with embodiment two unique different places the focusing coupling scheme of this enforcement has adopted four jiaos of convex lens that polish 11, and beam fast axis direction and slow-axis direction are unified to focus on.
Before light beam after utilizing convex lens 11 involutory bundles focused on, the groundwork flow process of embodiment four was identical with embodiment two.When giving single tube semiconductor laser 2 energisings of present embodiment through power supply lead wire 15, each single tube semiconductor laser begins bright dipping, and the light that sends at first passes through fast axis collimation mirror 3, slow axis collimating mirror 4, has obtained little beam divergence angle.Afterwards, the light that sends of each single tube semiconductor laser can be through the conversion of reflecting prism 5 travel directions of turning back.Afterwards, through polarization slide 6, common reflecting prism 7 and polarization beam cementing prism 8, the combiner that two groups of single tube semiconductor lasers are sent.Close light behind the bundle through convex lens 11, after unified focusing of realizing, forms a very little hot spot, and be coupled into optical fiber coupling head 12 acquisition optical fiber and export fast axle and slow axis.
Embodiment five
Present embodiment only contains 1 group of laser instrument, and every group has 5 single tube semiconductor lasers, that is present embodiment m value is 1, and the n value is 5, each single tube semiconductor laser still corresponding respectively a fast axis collimation mirror, a slow axis collimating mirror, the reflecting prism of turning back; Because present embodiment only contains one group of laser instrument, therefore need not realize not on the same group between light close bundle, therefore, present embodiment does not contain polarization slide, common reflecting prism, polarization beam cementing prism.Light beam after the reflecting prism of turning back is turned back is directly through fast and slow axis focus lamp group, focuses on and is coupled.
When giving the single tube semiconductor laser energising of present embodiment through power supply lead wire, each single tube semiconductor laser begins bright dipping, and the light that sends at first passes through fast axis collimation mirror, slow axis collimating mirror, has obtained little beam divergence angle.Afterwards, the light that each single tube semiconductor laser sends can be through the reflecting prism conversion of travel direction again of turning back, and this conversion process is identical with embodiment one, two.Afterwards, the 5 bundle light that on the slow axis direction of principal axis, obtain to arrange again directly focus on through too fast axle focus lamp and slow axis focus lamp, have been coupled into optical fiber coupling head after being focused.But because the contained single tube semiconductor laser of present embodiment number is less, so its output power is also lower.
Embodiment six
Present embodiment contains 20 groups of laser instruments, and every group has 30 single tube semiconductor lasers, that is present embodiment m value is 20; The n value is 30; And in 20 groups of laser instruments, each the single tube semiconductor laser wavelength in every group is identical, but group with organize between wavelength different; Have the light of 10 kinds of different wave lengths, each 2 groups of the light of every kind of wavelength; In the group each single tube semiconductor laser still corresponding respectively a fast axis collimation mirror, a slow axis collimating mirror, the reflecting prism of turning back; Realize the bundle that closes of light that 20 groups, every group 30 single tube semiconductor lasers send; Present embodiment need take polarization to close that bundle, wavelength close bundle and the mode that bundle combines is closed in the space; Be that present embodiment not only comprises polarization beam cementing prism and polarization slide, also comprise wavelength beam cementing prism group;
In addition; The closing bundle and can cause a large amount of arrangements of light of present embodiment light beam at slow-axis direction; At this moment slow-axis direction needs bigger focusing multiple and could optical fiber be advanced in optically-coupled; Therefore the slow axis of present embodiment focuses on multiple to focus on multiple than fast axle much bigger, the scheme that has adopted fast axle focus lamp and slow axis focus lamp that beam fast axis and slow-axis direction are focused on respectively.
When giving the single tube semiconductor laser energising of present embodiment through power supply lead wire, each single tube semiconductor laser begins bright dipping, and the light that sends is fast axis collimation mirror, slow axis collimating mirror at first, has obtained little beam divergence angle.Afterwards, the light that each single tube semiconductor laser sends can be through the reflecting prism conversion of travel direction again of turning back, and this conversion process is identical with embodiment one, two.Afterwards, the light that on slow-axis direction, obtains again first 10 groups of different-wavebands of arrangement realizes that through multi-wavelength beam cementing prism group wavelength closes bundle, and through the polarization slide, makes its polarization direction take place to have passed through polarizing prism after 90 ° of deflections; Similarly; The light of second 10 groups of different-waveband also closes bundle through multi-wavelength beam cementing prism group practice wavelength; But its light that closes behind the bundle directly projects on the reflecting surface of polarization beam cementing prism; The back that is reflected realizes that with the light that first 10 groups of wavelength close behind the bundle polarization closes bundle, and through the focusing respectively of fast axle focus lamp, slow axis focus lamp, is coupled into optical fiber.Because contained group of number of present embodiment is bigger with every group single tube semiconductor laser number, so its output power is very high, but because through more optical device and experience and repeatedly close bundle, its coupling efficiency is lower.
Each embodiment among the present invention all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than a kind of platform-type reflection single tube semiconductor laser fiber coupling module of turning back provided by the present invention has been carried out detailed introduction; Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. platform-type turning back reflected single tube semiconductor laser fiber coupling module; It is characterized in that, comprise carrying platform (1), array single tube semiconductor laser (2), several fast axis collimation mirrors (3), slow axis collimating mirror (4), several reflecting prisms of turning back (5), common reflecting prism (7), beam cementing prism (8), the combination of fast and slow axis focus lamp (9) and (10) and optical fiber coupling head (12); Every group of single tube semiconductor laser contains several single tube semiconductor lasers; Each single tube semiconductor laser (2) corresponding a fast axis collimation mirror (3), a slow axis collimating mirror (4) and the reflecting prism of turning back (5); Above-mentioned each optical device all lies in no step not to be had on the carrying platform of pedestal (1), and the height at the luminous place of each single tube semiconductor laser is consistent, and the light beam that the single tube semiconductor laser sends is realized collimation through fast axis collimation mirror and slow axis collimating mirror; Reflecting prism realizes turning back reflection through turning back; Realize closing bundle through common reflecting prism and beam cementing prism, after the combination of fast and slow axis focus lamp realizes focusing on, finally be coupled in the optical fiber coupling head.
2. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1; It is characterized in that; The path that the light beam that said single tube semiconductor laser sends arrives before the beam cementing prism is: after the reflecting prism reflection of turning back; Carry out primary event through common reflecting prism again, get into beam cementing prism afterwards; Or after the reflecting prism reflection of turning back, directly get into beam cementing prism.
3. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1; It is characterized in that the arrangement mode between the described m group single tube semiconductor laser can be selected to be arranged in parallel, homeotropic alignment and the combination with homeotropic alignment of being arranged in parallel.
4. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1 is characterized in that said single tube semiconductor laser comprises laser chip and heat sink two parts.
5. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1; It is characterized in that; The said reflecting prism of turning back contains two reflectings surface, and two reflectings surface become 45 with the carrying platform plane respectively on orthogonal both direction, after light beam carries out two secondary reflections; 90 ° of deflections take place in the direction of propagation of light, and the slow-axis direction of light is from becoming vertical with the carrying platform plane with the carrying platform plane parallel.
6. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1 is characterized in that said common reflecting prism is the triangle reflecting prism, or plane mirror.
7. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1 is characterized in that said beam cementing prism is the polarization beam cementing prism, or the wavelength beam cementing prism.
8. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1; It is characterized in that; The mode of described fast and slow axis focus lamp combination is: select the combination of fast axle focus lamp and slow axis focus lamp for use, realize the focusing respectively to fast axle of laser beam and slow-axis direction; Or select single convex lens or convex lens combination for use, realize fast axle of laser beam and the unified of slow-axis direction are focused on.
9. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1 is characterized in that the span of described m is 1～20.
10. the platform-type reflection single tube semiconductor laser fiber coupling module of turning back according to claim 1 is characterized in that the span of described n is 1～30.
Priority Applications (1)
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