CN204290021U - A kind of high-capacity optical fiber laser of based single crystal optical fiber - Google Patents
A kind of high-capacity optical fiber laser of based single crystal optical fiber Download PDFInfo
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- CN204290021U CN204290021U CN201420701951.7U CN201420701951U CN204290021U CN 204290021 U CN204290021 U CN 204290021U CN 201420701951 U CN201420701951 U CN 201420701951U CN 204290021 U CN204290021 U CN 204290021U
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Abstract
A kind of high-capacity optical fiber laser of based single crystal optical fiber, there are pumping source and coupled lens, dichroic mirror, active single crystal fiber and the output element to optical maser wavelength component permeate, pumping source, coupled lens, dichroic mirror, active single crystal fiber and output element are successively set in light path.Pumping source adopts semiconductor laser or fiber laser or solid state laser.Dichroic mirror adopts plated film lens or fiber grating or optical fiber end mirror.Active single crystal fiber includes: active single crystal fiber fibre core, be wrapped in the active single crystal fiber covering outside active single crystal fiber fibre core, be wrapped in the active single crystal fiber coat outside active single crystal fiber covering, wherein, the matrix of active single crystal fiber fibre core adopts Nd:YAG crystal or YAP crystal.Active single crystal fiber fibre core Doped ions is Nd or Yb or Er.Output element adopts plated film lens or fiber grating or optical fiber end mirror.The utility model plays the effect avoided optical fiber damage, improve fiber laser power output.
Description
Technical field
The utility model relates to a kind of fiber laser.Particularly relating to a kind of take single crystal fiber as the high-capacity optical fiber laser of the based single crystal optical fiber of Active Optical Fiber.
Background technology
Thermal effect can cause the problems such as hot depolarization, thermally induced diffractive losses, have a strong impact on the main performance index such as the power output of laser, conversion efficiency and beam quality, even causing the damage of gain media time serious, is the main limiting factor of superpower laser performance.For alleviating the impact that thermal effect is brought, those skilled in the relevant art are by adopting the gain media of the forms such as lath, DISK and optical fiber, increase the surface-to-volume ratio of gain media, significantly improve radiating efficiency, thus greatly advance the power output capacity of laser.Compare with DISK laser with lath, fiber laser has the advantage of following several respects: its pumping configuration is comparatively simple; The structure of optical fiber itself makes it also there is clear superiority in beam quality for the restriction of pattern; Coupling fiber can be adopted to export, and applied environment adaptability is fine; Based on these advantages, one of fiber laser main development direction having become superpower laser.
But an obvious obstacle of high-capacity optical fiber laser development is, the quartz glass conductive coefficient being widely used as Active Optical Fiber matrix is at present very little, is only 1.4-1.6W m
-1k
-1, little conductive coefficient brings huge adverse effect to heat radiation, therefore still has higher requirement for refrigeration during the running of fiber laser high power, and the continuation that also limit its power promotes.For monocrystalline gain medium, conventional laser crystal yttrium-aluminium-garnet (YAG) crystal conductive coefficient ~ 14Wm
-1k
-1, the conductive coefficient of yttrium aluminate (YAP) crystal also exceedes ~ 11Wm
-1k
-1, higher than quartz glass several times; Therefore, can consider to adopt monocrystalline as the matrix of Active Optical Fiber, utilize its high thermal conductivity coefficient to improve the heat dispersion of optical fiber itself, reduce the requirement of system for refrigeration, simplify the complexity of system, the output performance indexs such as the power of improving laser device and beam quality.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of high-capacity optical fiber laser that can improve the based single crystal optical fiber of the heat dispersion of fiber laser.
The technical scheme that the utility model adopts is: a kind of high-capacity optical fiber laser of based single crystal optical fiber, include pumping source and coupled lens, also be provided with high thoroughly to pump wavelength, grow tall to laser wave anti-dichroic mirror, active single crystal fiber and the output element to optical maser wavelength component permeate, described pumping source, coupled lens, dichroic mirror, active single crystal fiber and output element are successively set in light path.
Described pumping source adopts semiconductor laser or fiber laser or solid state laser.
Described dichroic mirror adopts plated film lens or fiber grating or optical fiber end mirror.
Described active single crystal fiber includes: active single crystal fiber fibre core, be wrapped in the active single crystal fiber covering outside active single crystal fiber fibre core, be wrapped in the active single crystal fiber coat outside active single crystal fiber covering, wherein, the matrix of described active single crystal fiber fibre core adopts Nd:YAG crystal or YAP crystal.
Described active single crystal fiber fibre core Doped ions is Nd or Yb or Er.
Described output element adopts plated film lens or fiber grating or optical fiber end mirror.
The high-capacity optical fiber laser of a kind of based single crystal optical fiber of the present utility model, the utility model substitutes the matrix of quartz glass as Active Optical Fiber by adopting the higher monocrystalline of conductive coefficient, increase the conductive coefficient of optical fiber, improve the heat conductivility of Active Optical Fiber, improve its heat dispersion, the temperature at effective reduction fibre core place, plays the effect avoided optical fiber damage, improve fiber laser power output.The utility model fundamentally to solve in high-capacity optical fiber laser that quartz glass matrix conductive coefficient is less affects radiating efficiency, is unfavorable for the problem that high power operates.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high-capacity optical fiber laser of a kind of based single crystal optical fiber of the utility model;
Fig. 2 is the structural representation of single crystal fiber in the utility model.
In figure,
1: pumping source 2: coupled lens
3: dichroic mirror 4: active single crystal fiber
41: active single crystal fiber fibre core 42: active single crystal fiber covering
43: active single crystal fiber coat 5: output element
Embodiment
Below in conjunction with embodiment and accompanying drawing, the high-capacity optical fiber laser to a kind of based single crystal optical fiber of the present utility model is described in detail.
As shown in Figure 1, the high-capacity optical fiber laser of a kind of based single crystal optical fiber of the present utility model, include pumping source 1 and coupled lens 2, it is characterized in that, also be provided with high thoroughly to pump wavelength, laser wave is grown tall dichroic mirror 3 anti-, active single crystal fiber 4 and only to the output element 5 of optical maser wavelength component permeate, described pumping source 1, coupled lens 2, dichroic mirror 3, active single crystal fiber 4 and output element 5 are successively set in light path.Wherein,
Described pumping source 1 is the superpower laser adopting multiple laser to fold battle array formation.Described laser adopts semiconductor laser or fiber laser or solid state laser etc., and emission wavelength corresponds to active single crystal fiber absorption band.As adopted high-power semiconductor laser to fold battle array, output wavelength 808nm, power output 1000W.
Described coupled lens 2 can adopt the condenser lens of focal length 30mm, is coated with 808nm anti-reflection film.
Described dichroic mirror 3 adopts plated film lens or fiber grating or optical fiber end mirror.As dichroic mirror 3 employing is coated with, 808nm is anti-reflection, the high anti-plane dichroic mirror of 1064nm, is close to active single crystal fiber 4 and places.
Described output element 5 adopts plated film lens or fiber grating or optical fiber end mirror, as adopted the level crossing of reflectivity 10%.
Described active single crystal fiber 4, there is population inversion, provide laser gain in absorptive pumping light, forms laser generation under the feedback effect of the laser resonant cavity formed at described dichroic mirror 3 and output element 5.Described active single crystal fiber 4 as shown in Figure 2, described active single crystal fiber 4 includes: active single crystal fiber fibre core 41, be wrapped in the active single crystal fiber covering 42 outside active single crystal fiber fibre core 41, be wrapped in the active single crystal fiber coat 43 outside active single crystal fiber covering 42, wherein, the crystal of the quartz glass matrix that the matrix of described active single crystal fiber fibre core 41 adopts conductive coefficient used far above traditional fiber, as Nd:YAG crystal or YAP crystal, the heat dispersion of optical fiber is improved with this, reduce fibre core temperature, improve laser output power.Described active single crystal fiber fibre core 41 Doped ions is the conventional laser doping ion such as Nd or Yb or Er.
The Nd:YAG monocrystalline refractive index of doping content 1.0-at.% is 1.81971064nm, and pure YAG crystal refractive index is 1.81471064nm, according to optical fiber single mode condition
known, doping Nd:YAG is utilized to be fibre core, pure YAG is covering, can construct core diameter 3 μm, the single mode single crystal fiber of numerical aperture NA=0.13, in embody rule, can by reducing the doping content of Nd:YAG fibre core or mix the adjustment refractive indexes such as Ge in pure YAG, make the refractive index of fibre core and covering more close, thus structure big core diameter single-mode structure single crystal fiber and doubly clad optical fiber, meet the needs of different capacity level and pump mode.
In embodiment of the present utility model, the matrix of active single crystal fiber fibre core 41 is Nd:YAG, covering 42 is pure YAG crystal, core diameter 100 μm, doping content 0.03-at.%, length 1m.
The high-capacity optical fiber laser of a kind of based single crystal optical fiber of the present utility model, the 808nm pump light that pumping source 1 is launched enters active single crystal fiber 4 after coupled lens 2 focuses on, active single crystal fiber 4 absorptive pumping light, form population inversion, produce laser gain, under the laserresonator feedback effect that dichroic mirror 3 and output element 5 are formed, form high power laser light vibration, export through output element 5.Wherein, the doping content of active single crystal fiber and length can be considered to select according to for combined factors such as the needs of refractive index and pump absorption, and the utility model embodiment does not limit this.
The high-capacity optical fiber laser of a kind of based single crystal optical fiber of the present utility model, the matrix of quartz glass as Active Optical Fiber is substituted by adopting the higher monocrystalline of conductive coefficient, improve the heat conductivility of Active Optical Fiber, reduce fibre core temperature, play the effect avoided optical fiber damage, improve fiber laser power output.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1. the high-capacity optical fiber laser of a based single crystal optical fiber, include pumping source (1) and coupled lens (2), it is characterized in that, also be provided with high thoroughly to pump wavelength, that grow tall anti-to laser wave dichroic mirror (3), active single crystal fiber (4) and the output element (5) to optical maser wavelength component permeate, described pumping source (1), coupled lens (2), dichroic mirror (3), active single crystal fiber (4) and output element (5) are successively set in light path.
2. the high-capacity optical fiber laser of a kind of based single crystal optical fiber according to claim 1, is characterized in that, described pumping source (1) adopts semiconductor laser or fiber laser or solid state laser.
3. the high-capacity optical fiber laser of a kind of based single crystal optical fiber according to claim 1, is characterized in that, described dichroic mirror (3) adopts plated film lens or fiber grating or optical fiber end mirror.
4. the high-capacity optical fiber laser of a kind of based single crystal optical fiber according to claim 1, it is characterized in that, described active single crystal fiber (4) includes: active single crystal fiber fibre core (41), be wrapped in the active single crystal fiber covering (42) in active single crystal fiber fibre core (41) outside, be wrapped in the active single crystal fiber coat (43) in active single crystal fiber covering (42) outside, wherein, the matrix of described active single crystal fiber fibre core (41) adopts Nd:YAG crystal or YAP crystal.
5. the high-capacity optical fiber laser of a kind of based single crystal optical fiber according to claim 4, is characterized in that, described active single crystal fiber fibre core (41) Doped ions is Nd or Yb or Er.
6. the high-capacity optical fiber laser of a kind of based single crystal optical fiber according to claim 1, is characterized in that, described output element (5) adopts plated film lens or fiber grating or optical fiber end mirror.
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| CN201420701951.7U CN204290021U (en) | 2014-11-20 | 2014-11-20 | A kind of high-capacity optical fiber laser of based single crystal optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466633A (en) * | 2014-11-20 | 2015-03-25 | 天津大学 | High-power optical fiber laser device based on single crystal optical fiber |
| 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 |
-
2014
- 2014-11-20 CN CN201420701951.7U patent/CN204290021U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466633A (en) * | 2014-11-20 | 2015-03-25 | 天津大学 | High-power optical fiber laser device based on single crystal optical fiber |
| 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 |
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