CN201413416Y - Optical fiber LD coupling structure used for wave band of visible light - Google Patents
Optical fiber LD coupling structure used for wave band of visible light Download PDFInfo
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- CN201413416Y CN201413416Y CN2009201392175U CN200920139217U CN201413416Y CN 201413416 Y CN201413416 Y CN 201413416Y CN 2009201392175 U CN2009201392175 U CN 2009201392175U CN 200920139217 U CN200920139217 U CN 200920139217U CN 201413416 Y CN201413416 Y CN 201413416Y
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Abstract
The utility model relates to the field of laser, in particular to a coupling device which couples laser light emitted by a laser after conversion by an optical system to enter optical fiber transmission, and particularly relates to an optical fiber LD coupling structure used for wave band of visible light. The optical fiber LD coupling structure comprises a first optical fiber (101) with a largerfiber core and a larger fiber core covering, and a second optical fiber (102) with a smaller fiber core and a smaller fiber core covering, wherein in the same axial direction, the end surface (S1) ofthe first optical fiber (101) and the opposite end surface (S2) of the second optical fiber (102) are welded into a whole; and the length of the first optical fiber (101) is on the order of mm. The optical fiber LD coupling structure not only increases the area when light enters the optical fiber, reduces the power density on the receiving optical fiber, and further improves the long-term reliability of system, but also plays the role of changing the mode of light spots, and greatly reduces the sensitivity as for LD coupling.
Description
Technical field
The utility model relates to laser field, relate in particular to will the laser instrument emitted laser through being coupled into the coupled apparatus of Optical Fiber Transmission after the optical system conversion, particularly at the optical fiber LD coupled apparatus of visible light wave range.
Background technology
The optical fiber-coupled laser device be a kind of will the laser instrument emitted laser through being coupled into the device of Optical Fiber Transmission after the optical system conversion.Because the development in fields such as laser display, medical treatment makes people increase day by day for the demand of the optical fiber-coupled laser device of visible light wave range at present.But several microns are only arranged owing to be used for its core diameter of optical fiber of visible light wave range, the power density that causes receiving the fiber core place is too high, thereby long-term use and manufacturing process in because fiber end face is vulnerable to contaminating impurity or wearing and tearing, impurity is absorbing the little blast that can burn in fact behind a large amount of luminous energy, irregular concave point will appear in fiber end face, it is inhomogeneous that light transmission becomes, and makes fibre core very easily be burnt out, thereby reduced the long-term reliability of system.Existing Chinese patent publication number is: in the patent of CN 1438503A this problem has been carried out detailed elaboration, and proposed a solution.The optical coupling structure of this scheme, be that a single-mode fiber is not axially being had on the optics that fibre core do not have luminous power yet uniformly with second that glass optical fiber is welded together, the latter's dimensions length makes the light of propagating process from fibre core disperse betwixt and pass through with linear fashion, and does not touch the sidewall of second optical fiber.Second optical fiber is by optical coupled to a GRIN Lens.Single-mode fiber has identical diameter with second optical fiber and is contained in the sleeve pipe.In this scheme, when entering into coreless fiber or other light medium, light can not run into tube wall, and can not have total reflection to take place inside, so it mainly be the area when increasing light and entering optical fiber as optical fiber, changing can not appear in facular model.
The utility model content
The utility model proposes another scheme, both made the fiber end face receiving area increase the change of going back adjoint mode simultaneously.
Concrete technical scheme of the present utility model is:
Be used for the optical fiber LD coupled structure of visible light wave range, comprise:
One has big fibre core and first optical fiber fibre core covering (101),
One has less fibre core and second optical fiber fibre core covering (102),
Same axially on, the end face (S1) of described first optical fiber (101) is fused into one with relative second optical fiber (102) end face (S2), and the length of first optical fiber (101) is the mm magnitude, can guarantee light by the time have only several low step modes appearance.
Further, the fibre core covering external diameter of described first optical fiber (101) equates with the fibre core covering external diameter of described second optical fiber (102).
Further, the fibre core covering overcoat of the fibre core covering of described first optical fiber (101) and described second optical fiber (102) inserts a capillary pipe box (201), and the internal diameter of described capillary pipe box (201) equates with the fibre core covering external diameter of described first optical fiber (101) and second optical fiber (102).
Described first optical fiber (101) is single-mode fiber or polarization maintaining optical fibre.Described second optical fiber (102) is smf-28e optical fiber or multimode optical fiber.
Be provided with laser instrument (301) and optical lens group (302) before the described optical fiber LD coupled structure, the laser that laser instrument (301) sends goes into to inject the front end face (S3) of described optical fiber LD coupled structure through the light beam of optical lens group (302) conversion.
In this programme before single-mode fiber the smf-28e optical fiber or the multimode optical fiber of one of welding section mm order of magnitude, after light enters into here, can total reflection take place as ordinary optic fibre, the variation of facular model is arranged simultaneously, again because length is shorter, main still based on several low step modes, like this with the single-mode fiber welding after, the energy of gaussian model just directly enters into single-mode fiber, area when therefore it not only increases light and enters optical fiber, and played the effect that changes facular model, concerning the LD coupling, sensitivity reduces greatly in addition.
Description of drawings
Fig. 1 a is the synoptic diagram of first optical fiber and second optical fiber;
Fig. 1 b is first optical fiber and second fused fiber splice synoptic diagram together;
Fig. 2 is the synoptic diagram of preferred embodiment of the present utility model;
Fig. 3 is an application synoptic diagram of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Concrete scheme of the present utility model be exactly an end of the single-mode fiber of visible light wave range or polarization maintaining optical fibre axially on the smf-28e optical fiber or the multimode optical fiber of one section mm order of magnitude of welding make optical fiber head, reduce the power density that receives on the optical fiber by increasing the core diameter that receives optical fiber, and then improved the long-term reliability of system, and since usually the angle of divergence of the LD both direction of visible light differ greatly, often present square focus spot, by making the light spot shape sphering behind the optical fiber the last period, basic mode wherein becomes branch to be easy to enter into the optical fiber of back.
Consult shown in Fig. 1 a and Fig. 1 b, be the assembly method of optical fiber LD coupled structure of the present utility model.This method needs one and is applicable to the single-mode fiber of visible light wave range or second optical fiber 102 of polarization maintaining optical fibre, and one section less than the smf-28e optical fiber of 2mm or first optical fiber 101 of multimode optical fiber.As shown in Figure 1a, second optical fiber 102 and first optical fiber 101 are aligned in the axial direction, and the two to treat that end face S1, the S2 of welding are cut into vertical with fiber axis.Fig. 1 b is depicted as the situation after the two form with the light contact is fused.Here, the core diameter of smf-28e optical fiber or multimode optical fiber is greater than the core diameter of single-mode fiber that is applicable to visible light wave range or polarization maintaining optical fibre, and this has just reduced the power density that receives on the fiber core, thereby has improved the long-term reliability of coupled system.
Consulting shown in Figure 2ly, is the assembly method side view of optical fiber head in the optical fiber LD coupled structure of the present utility model.First optical fiber 101 of several millimeters smf-28e optical fiber or multimode optical fiber is inserted in the capillary pipe box 201 after good with second optical fiber, 102 weldings of single-mode fiber or polarization maintaining optical fibre, this kapillary has an identical internal diameter of fibre cladding external diameter with first optical fiber 101 and second optical fiber 102, and face of weld is inserted in the capillary pipe box 201.The light beam that incides optical fiber head at first enters the front end face S3 of described optical fiber LD coupled structure, be smf-28e optical fiber or multimode optical fiber first optical fiber 101 in incide the end face of first optical fiber 101 of the single-mode fiber that is suitable for visible light wave range or polarization maintaining optical fibre after transmitting in the mode of total reflection, light beam in first optical fiber, 101 transmission courses by shaping, make welding second optical fiber 102 of first optical fiber 101 do not reduce the coupling efficiency of system.
Consulting shown in Figure 3 is application synoptic diagram of the present utility model.Wherein, 301 is laser instrument, as solid state laser or semiconductor laser, 302 is optical lens group, be made of one or more optical elements, make the output light of laser instrument 301 converge in optical fiber head 303 positions, optical fiber head 303 is optical fiber LD coupled structure described in the utility model.By first optical fiber 101 of the SMF-28e optical fiber of several millimeters of weldings or multimode optical fiber be applicable to that the single mode of visible light wave range or second optical fiber 102 of polarization maintaining optical fibre constitute.In this optical fiber-coupled laser device structure, the mould field of the output light of laser instrument 301 through optical lens group 302 carry out behind the mould field transformation with optical fiber head 303 in first optical fiber, 101 mould fields coupling, and the position of optical fiber head 303 and the output light of laser instrument 301 present position of girdling the waist after lens combination 302 conversion overlaps.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection domain of the present utility model.
Claims (9)
1. be used for the optical fiber LD coupled structure of visible light wave range, it is characterized in that: comprise
One has big fibre core and first optical fiber fibre core covering (101),
One has less fibre core and second optical fiber fibre core covering (102),
Same axially on, the end face (S1) of described first optical fiber (101) is fused into one with relative second optical fiber (102) end face (S2), the length of described first optical fiber (101) is the mm magnitude.
2. optical fiber LD coupled structure according to claim 1 is characterized in that: the fibre core covering external diameter of described first optical fiber (101) equates with the fibre core covering external diameter of described second optical fiber (102).
3. optical fiber LD coupled structure according to claim 1 and 2, it is characterized in that: the fibre core covering overcoat of the fibre core covering of described first optical fiber (101) and described second optical fiber (102) inserts a capillary pipe box (201), and the internal diameter of described capillary pipe box (201) equates with the fibre core covering external diameter of described first optical fiber (101) and second optical fiber (102).
4. optical fiber LD coupled structure according to claim 1 and 2 is characterized in that: described first optical fiber (101) is smf-28e optical fiber or multimode optical fiber.
5. optical fiber LD coupled structure according to claim 1 and 2 is characterized in that: described second optical fiber (102) is single-mode fiber or polarization maintaining optical fibre.
6. optical fiber LD coupled structure according to claim 1 and 2, it is characterized in that: be provided with laser instrument (301) and optical lens group (302) before the described optical fiber LD coupled structure, the laser that laser instrument (301) sends goes into to inject the front end face (S3) of described optical fiber LD coupled structure through the light beam of optical lens group (302) conversion.
7. optical fiber LD coupled structure according to claim 3, it is characterized in that: be provided with laser instrument (301) and optical lens group (302) before the described optical fiber LD coupled structure, the laser that laser instrument (301) sends goes into to inject the front end face (S3) of described optical fiber LD coupled structure through the light beam of optical lens group (302) conversion.
8. optical fiber LD coupled structure according to claim 4, it is characterized in that: be provided with laser instrument (301) and optical lens group (302) before the described optical fiber LD coupled structure, the laser that laser instrument (301) sends goes into to inject the front end face (S3) of described optical fiber LD coupled structure through the light beam of optical lens group (302) conversion.
9. optical fiber LD coupled structure according to claim 5, it is characterized in that: be provided with laser instrument (301) and optical lens group (302) before the described optical fiber LD coupled structure, the laser that laser instrument (301) sends goes into to inject the front end face (S3) of described optical fiber LD coupled structure through the light beam of optical lens group (302) conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201392175U CN201413416Y (en) | 2009-06-22 | 2009-06-22 | Optical fiber LD coupling structure used for wave band of visible light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201392175U CN201413416Y (en) | 2009-06-22 | 2009-06-22 | Optical fiber LD coupling structure used for wave band of visible light |
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| Publication Number | Publication Date |
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| CN201413416Y true CN201413416Y (en) | 2010-02-24 |
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| CN2009201392175U Expired - Lifetime CN201413416Y (en) | 2009-06-22 | 2009-06-22 | Optical fiber LD coupling structure used for wave band of visible light |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162883A (en) * | 2011-03-17 | 2011-08-24 | 武汉电信器件有限公司 | Spot coupling and conversion device |
| CN103368069A (en) * | 2012-03-30 | 2013-10-23 | 福州高意通讯有限公司 | A laser device structure for reducing high-order mode |
| CN105403954A (en) * | 2015-12-08 | 2016-03-16 | 北京凯普林光电科技股份有限公司 | Optical fiber input end structure |
| CN106199834A (en) * | 2016-09-29 | 2016-12-07 | 上海康阔光通信技术有限公司 | Fiber coupler and processing technology thereof |
| CN112505849A (en) * | 2020-12-04 | 2021-03-16 | 福建海创光电有限公司 | Optical fiber head for LD optical fiber coupling and manufacturing method |
-
2009
- 2009-06-22 CN CN2009201392175U patent/CN201413416Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162883A (en) * | 2011-03-17 | 2011-08-24 | 武汉电信器件有限公司 | Spot coupling and conversion device |
| CN103368069A (en) * | 2012-03-30 | 2013-10-23 | 福州高意通讯有限公司 | A laser device structure for reducing high-order mode |
| CN105403954A (en) * | 2015-12-08 | 2016-03-16 | 北京凯普林光电科技股份有限公司 | Optical fiber input end structure |
| CN106199834A (en) * | 2016-09-29 | 2016-12-07 | 上海康阔光通信技术有限公司 | Fiber coupler and processing technology thereof |
| CN112505849A (en) * | 2020-12-04 | 2021-03-16 | 福建海创光电有限公司 | Optical fiber head for LD optical fiber coupling and manufacturing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100224 |