CN102709797A - Intermediate infrared cascaded pulse optical fiber laser - Google Patents
Intermediate infrared cascaded pulse optical fiber laser Download PDFInfo
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- CN102709797A CN102709797A CN2012101809743A CN201210180974A CN102709797A CN 102709797 A CN102709797 A CN 102709797A CN 2012101809743 A CN2012101809743 A CN 2012101809743A CN 201210180974 A CN201210180974 A CN 201210180974A CN 102709797 A CN102709797 A CN 102709797A
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Abstract
The invention relates to an intermediate infrared cascaded pulse optical fiber laser, which comprises a semiconductor laser, a coupling lens group and a double clad ZBLAN optical fiber in sequential connection and is characterized in that a dichroic mirror is positioned in the coupling lens group, an optical fiber Bragg grating FBG<1>4 and an optical fiber Bragg grating FBG<2>5 are arranged between one end of the double clad ZBLAN optical fiber and the coupling lens group, the other end of the ZBLAN optical fiber is provided with a wide-spectrum reflector, and the surface of one side of the wide-spectrum reflector near the double clad ZBLAN optical fiber is provided with a saturable absorbing body using a graphene film as laser. The optical fiber Bragg grating FBG<1> and the wide-spectrum reflector form a first resonant cavity of the laser, and the optical fiber Bragg grating FBG<2>5 and the wide-spectrum reflector form a second resonant cavity of the laser. The intermediate infrared cascaded pulse optical fiber laser has the beneficial effects that the structure of the device is simple, the transportability and the integration degree are high, and the practical application is favorably realized.
Description
Technical field
The invention belongs to laser technology field, particularly a kind of pulse optical fiber.
Background technology
Fiber laser have that laser threshold is low, output beam quality good, conversion efficiency is high and high " surface area/volume " better than, pliability and flexibility, be easy to remarkable advantages such as integrated; In the research of nearest pulse optical fiber; Its wavelength mainly concentrates on about 2.8um, and the method for employing is mainly gain modulation, acousto-optic modulator and initiatively transfers Q and the passive Q-adjusted three kinds of modes of saturable absorber.1. the gain modulation mode is through the method for pulse pump the population of energy level in the laser transition to be carried out periodic modulation, realize the pulse output of laser, but this method need be carried out pulse modulation to pump light, damages pump laser and fiber end face easily.2. initiatively to transfer Q then be through outside optical fiber to acousto-optic modulator; Thereby place the output that acousto-optic modulator is controlled the loss realization Q impulse in the laser cavity in the resonant cavity; And this method need be placed acousto-optic modulator outside optical fiber; This make fiber laser lost intrinsic flexibly, compact, advantage such as volume is little, middle-infrared band acousto-optic modulator material requested is special in addition, this has just improved its cost of manufacture and difficulty.3. for the passive Q-adjusted method of saturable absorber, also do not develop the saturable absorber of work 2.8um left and right sides wave band at present in the world.
Summary of the invention
The present invention is for solving the deficiency that pulse optical fiber of the prior art exists, proposed a kind of in cascaded infrared pulse optical fiber.
Technical scheme of the present invention is: cascaded infrared pulse optical fiber in a kind of; Comprise the semiconductor laser, coupled lens group and the double clad ZBLAN optical fiber that connect successively; It is characterized in that; Said dichroic mirror is arranged in the coupled lens group, is provided with optical fiber bragg grating FBG between an end of said double clad ZBLAN optical fiber and the coupled lens group
14 and optical fiber bragg grating FBG
25, the other end of said ZBLAN optical fiber is provided with the wide range speculum, and said wide range speculum has the saturable absorber of graphene film as laser near the surface of a side of double clad ZBLAN optical fiber.
Said fine bragg grating FBG
1With first resonant cavity of wide range speculum formation laser, and optical fiber bragg grating FBG
25 constitute second resonant cavity of laser with the wide range speculum.
Said double clad ZBLAN optical fiber is that double clad is mixed Er
3+ZBLAN optical fiber, said double clad is mixed Er
3+Er in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 1.6 μ m and 2.7 μ m laser.
Said optical fiber bragg grating FBG
1And optical fiber bragg grating FBG
2Mix Er by femto-second laser in said double clad
3+Inscribe on the ZBLAN optical fiber and form optical fiber bragg grating FBG
14 reflection kernel wavelength are corresponding to 1.6 μ m, and 1.6 μ m laser are high reflectance, said optical fiber bragg grating FBG
25 reflection kernel wavelength are corresponding to 2.7 μ m, but it has high transmittance to 2.7 μ m laser.
Said double clad ZBLAN optical fiber is that double clad is mixed or Ho
3+ZBLAN optical fiber, said double clad is mixed Ho
3+Ho in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 2.1 μ m and 3.0 μ m laser.
Said optical fiber bragg grating FBG
1And optical fiber bragg grating FBG
2Mix Ho by femto-second laser in said double clad
3+Inscribe on the ZBLAN optical fiber and form optical fiber bragg grating FBG
14 reflection kernel wavelength are corresponding to 2.1 μ m, and 2.1 μ m laser are high reflectance, said optical fiber bragg grating FBG
2The reflection kernel wavelength is corresponding to 3.0 μ m, but it has high transmittance to 3.0 μ m laser.
The invention has the beneficial effects as follows: 1. avoided in traditional gain modulation mode and the acousto-optic modulator active Q-regulating method; Need carry out pulse modulation to pump light; And then cause that pump laser and fiber end face damage, thereby and use the outer acousto-optic modulator of external optical fiber to cause problems such as device flexibility reduction, make apparatus structure simple; But portable high with integrated level, help practical application.2. having avoided 2.8 μ m left and right sides wave bands in the passive Q-adjusted method does not also have the problem of saturable absorber.
Description of drawings
Fig. 1 be of the present invention a kind of in cascaded infrared pulse optical fiber structural representation.
Fig. 2 is the energy level variations sketch map of double clad ZBLAN optical fiber of the present invention.
Description of reference numerals: 1 semiconductor laser, 2 coupled lens groups, 3 dichroic mirrors, 4 optical fiber bragg grating FBGs
1, 5 optical fiber bragg grating FBGs
2, 6 double clad ZBLAN optical fiber, 7 graphene films, 8 wide range speculums, 9 energy levels
4I
11/2Or
5I
6, 10 energy levels
4I
13/2Or
5I
7, 11 energy levels
4I
15/2Or
5I
8, 12 is 2.7 μ m or 3.0 μ m laser, 13 is 1.6 μ m or 2.1 μ m laser, 14 continuous pump lights.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment specific embodiments of the present invention is done further explanation.
Embodiment 1: as shown in Figure 1; Cascaded infrared pulse optical fiber in a kind of; Comprise the semiconductor laser 1, coupled lens group 2 and double clad ZBLAN (fluoride) optical fiber 6 that connect successively; Said dichroic mirror 3 is arranged in coupled lens group 2, is provided with optical fiber bragg grating FBG between an end of said double clad ZBLAN optical fiber 6 and the coupled lens group 2
14 and optical fiber bragg grating FBG
25, the other end of said ZBLAN optical fiber 6 is provided with wide range speculum 8, and said wide range speculum 8 has the saturable absorber of graphene film 7 as laser near the surface of a side of double clad ZBLAN optical fiber 6.
Said double clad ZBLAN optical fiber 6 is mixed Er for double clad
3+ZBLAN optical fiber, said double clad is mixed Er
3+Er in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 1.6 μ m and 2.7 μ m laser.
(method of solution of Graphene-PVA) forms this film in the wide range mirror surface, as the saturable absorber of 1.6 μ m laser to said graphene film 7 through deposition Graphene-polyvinyl alcohol.
Said fine bragg grating FBG
14 constitute first resonant cavity of laser with wide range speculum 8, and optical fiber bragg grating FBG
25 constitute second resonant cavity of laser with wide range speculum 8.The centre wavelength of said first resonant cavity is wavelength 1.6 μ m, and the centre wavelength of said second resonant cavity is 2.7 μ m.
Said optical fiber bragg grating FBG
14 and optical fiber bragg grating FBG
25 mix Er by femto-second laser in said double clad
3+Inscribe on (erbium ion) ZBLAN optical fiber and form optical fiber bragg grating FBG
14 reflection kernel wavelength are corresponding to 1.6 μ m, and 1.6 μ m laser are high reflectance, said optical fiber bragg grating FBG
25 reflection kernel wavelength are corresponding to 2.7 μ m, but it has high transmittance to 2.7 μ m laser.
In the present embodiment, semiconductor laser 1 is as pumping source, and it can output wavelength be the continuous pump light of 975nm.Said coupled lens group 2 is used for the continuous pump light of collimation, it is coupled into said double clad mixes Er
3+In ZBLAN optical fiber 6 inner claddings; Said dichroic mirror 3 has continuous pump light is high-transmission rate, and the 2.7 μ m laser that produce are the characteristic of high reflectance, can be used as the output coupling of pulse laser.Said wide range speculum 8 is as an end of resonant cavity, has the characteristic that 1.6 μ m and 2.7 μ m laser is high reflectance.
Embodiment 2: as shown in Figure 1, the structure of present embodiment is identical with embodiment 1, and different is that said double clad ZBLAN optical fiber 6 adopts double clad to mix Ho
3+ZBLAN optical fiber, therefore, corresponding said double clad is mixed Ho
3+Ho in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 2.1 μ m and 3.0 μ m laser.
(method of solution of Graphene-PVA) forms this film in the wide range mirror surface, as the saturable absorber of 2.1 μ m laser to said graphene film 7 through deposition Graphene-polyvinyl alcohol.
Said fine bragg grating FBG
14 constitute first resonant cavity of laser with wide range speculum 8, and optical fiber bragg grating FBG
25 constitute second resonant cavity of laser with wide range speculum 8.The centre wavelength of said first resonant cavity is wavelength 2.1 μ m, and the centre wavelength of said second resonant cavity is 3.0 μ m.
Said optical fiber bragg grating FBG
14 and optical fiber bragg grating FBG
25 mix Ho by femto-second laser in said double clad
3+Inscribe on (holmium ion) ZBLAN optical fiber and form optical fiber bragg grating FBG
14 reflection kernel wavelength are corresponding to 2.1 μ m, and 2.1 μ m laser are high reflectance, said optical fiber bragg grating FBG
25 reflection kernel wavelength are corresponding to 3.0 μ m, but it has high transmittance to 3.0 μ m laser.
In the present embodiment, semiconductor laser 1 is as pumping source, and it can output wavelength be the continuous pump light of 1150nm.Said coupled lens group 2 is used for the continuous pump light of collimation, it is coupled into said double clad mixes Ho
3+In ZBLAN optical fiber 6 inner claddings; Said dichroic mirror 3 has continuous pump light is high-transmission rate, and the 3.0 μ m laser that produce are the characteristic of high reflectance, can be used as the output coupling of pulse laser.Said wide range speculum 8 is as an end of resonant cavity, has the characteristic that 2.1 μ m and 3.0 μ m laser is high reflectance.
Below, do further explanation in the operation principle that combines 2 couples of embodiment of accompanying drawing 1 and embodiment 2:
The wavelength that semiconductor laser 1 is produced is that the continuous pump light of 975nm is through coupled lens group 2 collimations and be coupled into double clad and mix Er
3+In the inner cladding of ZBLAN (fluoride) optical fiber 6, at optical fiber bragg grating FBG
1Produce the continuous laser of 1.6 μ m in 4 resonant cavitys that constitute with wide range speculum 8, corresponding to
4I1
3/2→
4I1
5/2The transition of energy level (being that label 10 arrives label 11 among Fig. 2), under the saturated absorption effect of Graphene 7,7 couples 1.6 μ m of Graphene continuous laser carries out passive Q-adjusted, so just produced the pulse laser of 1.6 μ m.The pulse laser of meanwhile formed 1.6 μ m is right again
4I
11/2→
4I
13/2The inverted population of (be among Fig. 2 label 9 to label 10) carries out periodic modulation, and is promptly right
4I
11/2→
4I
13/2The corresponding laser of energy level transition carries out gain modulation, is the pulse laser of 2.7 μ m so just produced wavelength, and it is at FBG
2Resonance and obtain amplifying in 5 resonant cavitys that constitute with wide range speculum 8 is the pulse laser of 2.7 μ m through dichroic mirror 3 output wavelengths at last.
Among the above embodiment, employing be that wavelength is the semiconductor laser of 975nm, it is corresponding, and what adopt is that double clad is mixed Er
3+ZBLAN (fluoride) optical fiber; Also can adopt wavelength is the semiconductor laser of 1150nm, and what its correspondence was adopted is that double clad is mixed Ho
3+ZBLAN (fluoride) optical fiber, at this moment, its corresponding energy level is respectively
5I
6,
5I
7,
5I
8The pulse laser wavelength that produces be respectively 2.1 μ m (
5I
7→
5I
8Energy level transition) and 3.0 μ m (
5I
6→
5I
7Energy level transition), be output as the pulse laser of 3.0um.
Though above-mentioned two embodiment are only given two kinds of different double clad ZBLAN optical fiber 6 that mix; And be that 975nm and 1150nm are as pumping source only also with wavelength corresponding to these the two kinds different double clad ZBLAN optical fiber 6 that mix; Thereby two kinds of corresponding different transition radiations of mixing have been produced, two kinds of centre wavelength of first resonant cavity and second resonant cavity and optical fiber bragg grating FBG
14 and optical fiber bragg grating FBG
25 different optical property; Those of ordinary skill in the art is to be appreciated that; The innovative point of application of the present invention at first is structure itself; Next is only concrete doping and the value of two embodiment, and the appearance of these two embodiment is just explained structural principle of the present invention for better, and should not be construed as the restriction to application of the present invention.
Claims (6)
1. cascaded infrared pulse optical fiber in a kind; Comprise the semiconductor laser (1), coupled lens group (2) and the double clad ZBLAN optical fiber (6) that connect successively; It is characterized in that; Said dichroic mirror (3) is arranged in coupled lens group (2), is provided with optical fiber bragg grating FBG between an end of said double clad ZBLAN optical fiber (6) and the coupled lens group (2)
1(4) and optical fiber bragg grating FBG
2(5), the other end of said ZBLAN optical fiber (6) is provided with wide range speculum (8), and said wide range speculum (8) has the saturable absorber of graphene film (7) as laser near the surface of a side of double clad ZBLAN optical fiber (6).
2. according to claim 1 a kind of in cascaded infrared pulse optical fiber, it is characterized in that said fine bragg grating FBG
1(4) and wide range speculum (8) constitute first resonant cavity of laser, and optical fiber bragg grating FBG
2(5) and wide range speculum (8) constitute second resonant cavity of laser.
3. according to claim 1 and 2 a kind of in cascaded infrared pulse optical fiber, it is characterized in that said double clad ZBLAN optical fiber (6) is mixed Er for double clad
3+ZBLAN optical fiber, said double clad is mixed Er
3+Er in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 1.6 μ m and 2.7 μ m laser.
4. according to claim 3 a kind of in cascaded infrared pulse optical fiber, it is characterized in that said optical fiber bragg grating FBG
1(4) and optical fiber bragg grating FBG
2(5) mix Er by femto-second laser in said double clad
3+Inscribe on the ZBLAN optical fiber and form optical fiber bragg grating FBG
1(4) the reflection kernel wavelength is corresponding to 1.6 μ m, and 1.6 μ m laser are high reflectance, said optical fiber bragg grating FBG
2(5) the reflection kernel wavelength is corresponding to 2.7 μ m, but it has high transmittance to 2.7 μ m laser.
5. according to claim 1 and 2 a kind of in cascaded infrared pulse optical fiber, it is characterized in that said double clad ZBLAN optical fiber (6) is mixed or Ho for double clad
3+ZBLAN optical fiber, said double clad is mixed Ho
3+Ho in the ZBLAN optical fiber
3+Ion energy level transition corresponding wavelength respectively is the transition radiation of 2.1 μ m and 3.0 μ m laser.
6. according to claim 5 a kind of in cascaded infrared pulse optical fiber, it is characterized in that said optical fiber bragg grating FBG
1(4) and optical fiber bragg grating FBG
2(5) mix Ho by femto-second laser in said double clad
3+Inscribe on the ZBLAN optical fiber and form optical fiber bragg grating FBG
1(4) the reflection kernel wavelength is corresponding to 2.1 μ m, and 2.1 μ m laser are high reflectance, said optical fiber bragg grating FBG
2(5) the reflection kernel wavelength is corresponding to 3.0 μ m, but it has high transmittance to 3.0 μ m laser.
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|---|---|---|---|
| CN201210180974.3A CN102709797B (en) | 2012-06-05 | 2012-06-05 | Intermediate infrared cascaded pulse optical fiber laser |
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|---|---|---|---|
| CN201210180974.3A CN102709797B (en) | 2012-06-05 | 2012-06-05 | Intermediate infrared cascaded pulse optical fiber laser |
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| CN102709797A true CN102709797A (en) | 2012-10-03 |
| CN102709797B CN102709797B (en) | 2014-04-09 |
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| CN103022869A (en) * | 2012-12-31 | 2013-04-03 | 电子科技大学 | Passive mode-locking guide gain-modulated dual-wavelength pulse fiber laser |
| CN103701021A (en) * | 2013-12-17 | 2014-04-02 | 北京工业大学 | All-fiber pulse laser utilizing cross modulation of resonant cavities |
| CN103701022A (en) * | 2013-12-19 | 2014-04-02 | 北京工业大学 | Double-resonant-cavity all-optical-fiber mode-locked pulse laser |
| CN104184041A (en) * | 2014-09-12 | 2014-12-03 | 青岛科技大学 | High-power intermediate-infrared cascading all-solid-state laser |
| CN105161968A (en) * | 2015-09-22 | 2015-12-16 | 电子科技大学 | Graphene-based mid-infrared dual-wavelength co-repetition frequency pulsed fiber laser |
| CN105977775A (en) * | 2016-07-18 | 2016-09-28 | 电子科技大学 | Cascade gain modulation dual-wavelength medium-infrared pulse optical fiber laser device |
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
| CN106253041A (en) * | 2016-10-20 | 2016-12-21 | 电子科技大学 | A kind of all-fiber mid-infrared ultra-short pulse laser emitter |
| CN106374327A (en) * | 2016-08-25 | 2017-02-01 | 电子科技大学 | Intermediate infrared multi-band all-fiber soft glass laser and laser obtaining method |
| CN108336636A (en) * | 2018-03-02 | 2018-07-27 | 中国科学院合肥物质科学研究院 | A kind of single crystal fiber laser |
| CN108390242A (en) * | 2018-03-21 | 2018-08-10 | 中国科学院合肥物质科学研究院 | It is a kind of it is close in infrared double-wave length mix Er single crystal fiber cascaded lasers |
| CN110581431A (en) * | 2019-09-11 | 2019-12-17 | 深圳大学 | Erbium-doped fluoride fiber laser and laser generation method |
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| CN103022869B (en) * | 2012-12-31 | 2014-09-24 | 电子科技大学 | Passive mode-locking guide gain-modulated dual-wavelength pulse fiber laser |
| CN103022869A (en) * | 2012-12-31 | 2013-04-03 | 电子科技大学 | Passive mode-locking guide gain-modulated dual-wavelength pulse fiber laser |
| CN103701021B (en) * | 2013-12-17 | 2017-03-01 | 北京工业大学 | A kind of all-fiber pulse laser of resonator cavity crossmodulation |
| CN103701021A (en) * | 2013-12-17 | 2014-04-02 | 北京工业大学 | All-fiber pulse laser utilizing cross modulation of resonant cavities |
| CN103701022A (en) * | 2013-12-19 | 2014-04-02 | 北京工业大学 | Double-resonant-cavity all-optical-fiber mode-locked pulse laser |
| CN103701022B (en) * | 2013-12-19 | 2017-12-15 | 北京工业大学 | A kind of dual resonant cavity all -fiber Mode-locked laser device |
| CN104184041A (en) * | 2014-09-12 | 2014-12-03 | 青岛科技大学 | High-power intermediate-infrared cascading all-solid-state laser |
| CN105161968A (en) * | 2015-09-22 | 2015-12-16 | 电子科技大学 | Graphene-based mid-infrared dual-wavelength co-repetition frequency pulsed fiber laser |
| CN105161968B (en) * | 2015-09-22 | 2018-05-04 | 电子科技大学 | A kind of middle infrared double-wave length based on graphene is the same as repetition pulse optical fiber |
| CN106058624B (en) * | 2016-06-29 | 2019-07-02 | 电子科技大学 | Infrared pulse optical fiber laser and the method for obtaining laser in tunable gain modulation |
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
| CN105977775A (en) * | 2016-07-18 | 2016-09-28 | 电子科技大学 | Cascade gain modulation dual-wavelength medium-infrared pulse optical fiber laser device |
| CN105977775B (en) * | 2016-07-18 | 2019-02-19 | 电子科技大学 | Cascaded gain modulates infrared pulse optical fiber laser in dual wavelength |
| CN106374327B (en) * | 2016-08-25 | 2019-05-10 | 电子科技大学 | In infrared multiband all -fiber soft glass laser and obtain laser method |
| CN106374327A (en) * | 2016-08-25 | 2017-02-01 | 电子科技大学 | Intermediate infrared multi-band all-fiber soft glass laser and laser obtaining method |
| CN106253041A (en) * | 2016-10-20 | 2016-12-21 | 电子科技大学 | A kind of all-fiber mid-infrared ultra-short pulse laser emitter |
| CN108336636A (en) * | 2018-03-02 | 2018-07-27 | 中国科学院合肥物质科学研究院 | A kind of single crystal fiber laser |
| CN108390242A (en) * | 2018-03-21 | 2018-08-10 | 中国科学院合肥物质科学研究院 | It is a kind of it is close in infrared double-wave length mix Er single crystal fiber cascaded lasers |
| CN110581431A (en) * | 2019-09-11 | 2019-12-17 | 深圳大学 | Erbium-doped fluoride fiber laser and laser generation method |
| CN110581431B (en) * | 2019-09-11 | 2021-10-15 | 深圳大学 | Erbium-doped fluoride fiber laser and laser generation method |
| CN115425508A (en) * | 2022-09-21 | 2022-12-02 | 电子科技大学 | Dual-wavelength laser switchable output mid-infrared fiber laser |
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