CN103036138A - Free space pumping outer cavity surface green ray emitting laser - Google Patents
Free space pumping outer cavity surface green ray emitting laser Download PDFInfo
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- CN103036138A CN103036138A CN2012105441035A CN201210544103A CN103036138A CN 103036138 A CN103036138 A CN 103036138A CN 2012105441035 A CN2012105441035 A CN 2012105441035A CN 201210544103 A CN201210544103 A CN 201210544103A CN 103036138 A CN103036138 A CN 103036138A
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Abstract
The invention discloses a free space pumping outer cavity surface green ray emitting laser which comprises a free space pumping part and a folding type optics resonant cavity, wherein the folding type optics resonant cavity comprises a gain medium mirror, an output coupling mirror, another output coupling mirror and a resonant cavity rear-end mirror, wherein the gain medium mirror and the output coupling mirror form a first folding arm, and the another output coupling mirror and the resonant cavity rear-end mirror form a second folding arm. According to the free space pumping outer cavity surface green ray emitting laser, the free space pumping part and the folding type optics resonant cavity, the using efficiency of pump light is improved, space positions are utilized completely, and size occupied by the whole laser of the pumping part is greatly reduced. High reflection for fundamental frequency light is achieved, an external cavity mirror having high penetration for frequency doubling light outputs green laser, the green laser can not return back to the gain medium part to be absorbed, output power of the green laser is improved, absorption for the frequency doubling light by gain media is reduced simultaneously, and calorific value is reduced. The folding type optics resonant cavity is utilized for further saving space and reducing size. Therefore, the laser is good in light beam quality, high in transfer efficiency, large in output power and simple and compact in structure.
Description
Technical field
The present invention relates to a kind of for laser technology field, particularly a kind of free space pumping External-Cavity Surface-Emitting green (light) laser.
Background technology
The pumped solid laser technology has comparatively wide application prospect in every field, in the prior art, light-pumped solid state laser generally comprises semiconductor laser complete machine, gain medium and optical resonator, and the laser that forms after the pumping is gone forward side by side to exercise by external cavity mirror output and used.The laser of this kind structure makes the structure of whole laser become huge owing to using the semiconductor laser complete machine as pumping source, and also insufficient to the utilization of pump light, efficient is lower, and energy consumption is higher.General green (light) laser is to put into nonlinear crystal to carry out frequency multiplication in linear optical resonator, and this is so that the optical power density on the nonlinear crystal can not be optimized, so frequency-doubling conversion efficiency is not high; In addition, the green glow after the frequency multiplication can be absorbed again by gain media, has both reduced the power output of green glow, has increased again the heating of gain media, all is the negative effect effect to laser.
Therefore, need to improve existing laser, improve the beam quality of laser, increase frequency-doubling conversion efficiency, increase the power output of green laser, further the space structure of laser is dwindled, so that whole laser miniaturization, obtain a good beam quality, conversion efficiency is high, power output is large, simple and compact for structure miniaturization green (light) laser.
Summary of the invention
In view of this, purpose of the present invention provides a kind of free space pumping External-Cavity Surface-Emitting green (light) laser, improve the beam quality of laser, increase frequency-doubling conversion efficiency, increase the power output of green laser, further the space structure of laser is dwindled, so that whole laser miniaturization, obtain a good beam quality, conversion efficiency is high, power output is large, simple and compact for structure miniaturization green (light) laser.
Free space pumping External-Cavity Surface-Emitting green (light) laser of the present invention comprises free space pumping part and collapsible optical resonator part, and described collapsible optical resonator comprises:
The gain media mirror is simultaneously as terminal reflector before the collapsible optical resonator and basic frequency laser gain media;
Filter works to press narrow fundamental frequency optical linewidth; The fundamental frequency light of receiving gain dielectric mirror is also pressed narrow fundamental frequency optical linewidth;
Output coupling mirror, high anti-and thoroughly high to frequency doubled light to fundamental frequency light, be used for being folded to form collapsible optical resonator and coupling output green laser;
Nonlinear crystal receives the fundamental frequency light of output coupling mirror reflection and fundamental frequency light is carried out optical frequency-doubling;
Chamber, the anti-rear end of height mirror, all high anti-to fundamental frequency light and frequency doubled light, be used for reception from the emergent light of nonlinear crystal and be reflected back nonlinear crystal, after the nonlinear crystal frequency multiplication, transport to output coupling mirror.
Described gain media mirror and output coupling mirror form the first folding arm, and end mirror forms the second folding arm behind output coupling mirror and the resonant cavity.
Further, described free space pumping partly comprises:
Incident light source forms the pump beam array by semiconductor laser array;
Light-beam forming unit carries out shaping to the pump beam array, synthesizes a branch of pump light;
Further, described nonlinear crystal position is adjustable.
Beneficial effect of the present invention: free space pumping External-Cavity Surface-Emitting green (light) laser of the present invention, the present invention adopts free space pump cavity and collapsible optical resonator, in free space pumping part pump beam is carried out Shape correction, improve the service efficiency of pump light, take full advantage of the locus, significantly reduce pumping part shared volume in whole laser; In the folding arm of gain media mirror and output coupling mirror formation, use filter to press narrow fundamental frequency optical linewidth to improve shg efficiency; Use is to high anti-and saturating to the frequency doubled light high external cavity mirror coupling output green laser of fundamental frequency light, making green laser not return gain media partly is absorbed, improve the green laser power output, avoided simultaneously gain media to the frequency multiplication Optical Absorption, reduced caloric value; In formed another folding arm of the rear end mirror of output coupling mirror and optical resonator, place nonlinear crystal, this crystal positions can be set to and can regulate, to obtain maximum fundamental frequency optical power density, the harmonic generation efficiency that generation efficiency is the highest is realized efficient frequency multiplication process; Whole optical resonator adopts accordion structure, except above-mentioned all advantages are arranged, further utilizes the locus, and the laser volume is reduced; Good beam quality of the final formation of this invention, the miniaturization free space pumping External-Cavity Surface-Emitting green (light) laser that conversion efficiency is high, power output is large, simple and compact for structure.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is structural principle schematic diagram of the present invention.
Embodiment
Fig. 1 is structural principle schematic diagram of the present invention, as shown in the figure: the free space pumping External-Cavity Surface-Emitting green (light) laser of the present embodiment, comprise free space pumping part and collapsible optical resonator, described collapsible optical resonator comprises:
Gain media mirror 3 is simultaneously as terminal reflector before the collapsible optical resonator and basic frequency laser gain media;
Filter 4 works to press narrow fundamental frequency optical linewidth; The fundamental frequency light of receiving gain dielectric mirror is also pressed narrow fundamental frequency optical linewidth; Namely only allow the basic frequency laser of a certain frequency to pass through, work to press narrow basic frequency laser optical linewidth;
Output coupling mirror 5, high anti-and thoroughly high to frequency doubled light to fundamental frequency light, be used for being folded to form collapsible optical resonator and coupling output green laser;
Nonlinear crystal 6 receives the fundamental frequency light of output coupling mirror reflection and fundamental frequency light is carried out optical frequency-doubling;
End mirror 7 behind the resonant cavity, and is all high anti-to fundamental frequency light and frequency doubled light, is used for reception from the emergent light of nonlinear crystal 6 and is reflected back nonlinear crystal 6, transports to output coupling mirror 5 after nonlinear crystal 6 frequencys multiplication; Be that end mirror 7 is used for still non-switched basic frequency laser of reflection behind the resonant cavity, again be converted to frequency doubled light from output coupling mirror 5 outputs through nonlinear crystal 6, or the frequency doubled light that will change is reflected back, from output coupling mirror 5 coupling outputs; High anti-and thoroughly high to frequency doubled light by 5 pairs of fundamental frequency light of output coupling mirror, the output green laser.Structure thus, nonlinear crystal 6 receive to the fundamental frequency light of 7 reflections of end mirror after output coupling mirror 5 resonant cavity and to fundamental frequency light carries out optical frequency-doubling.
Described gain media mirror 3 forms the first folding arm with output coupling mirror 5, and end mirror 7 forms the second folding arm behind output coupling mirror 5 and the resonant cavity.
In the present embodiment, described free space pumping partly comprises:
Incident light source 1 forms the pump beam array by semiconductor laser array;
Light-beam forming unit 2, the laser beam array that semi-conductor array is sent synthesizes light beam and is radiated on the gain media mirror 3 by shaping.
In the present embodiment, described nonlinear crystal 6 positions are adjustable; To obtain maximum fundamental frequency optical power density, the harmonic generation efficiency that generation efficiency is the highest is realized efficient frequency multiplication process.
Among the present invention, fundamental frequency light is incident upon output coupling mirror 5 after filter plate 4 pressures are narrow, output coupling mirror 5 reflexes to nonlinear crystal 6 with fundamental frequency light, be incident upon high anti-chamber mirror 7 after the frequency multiplication and be reflected back nonlinear crystal 6 and realize two-pass SHG, and by the 5 unidirectional outputs of chamber mirror, fundamental frequency light is reflected back the gain media mirror through filter plate 4, realizes the optical resonance of fundamental frequency light.
The filter that adopts in the first folding arm presses narrow fundamental frequency optical linewidth to be conducive to improve the conversion efficiency of frequency multiplication, the adjustable conversion efficiency that also is conducive to increase second harmonic in nonlinear crystal position in the second folding arm, green glow only exists in the second folding arm, guaranteed not return the first arm by the again absorption of gain media, increased the power output of green glow, also be conducive to reduce the caloric value of gain media, increase work efficiency.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. free space pumping External-Cavity Surface-Emitting green (light) laser is characterized in that: comprise free space pumping part and collapsible optical resonator part, described collapsible optical resonator comprises:
The gain media mirror is simultaneously as terminal reflector before the collapsible optical resonator and basic frequency laser gain media;
Filter works to press narrow fundamental frequency optical linewidth; The fundamental frequency light of receiving gain dielectric mirror is also pressed narrow fundamental frequency optical linewidth;
Output coupling mirror, high anti-and thoroughly high to frequency doubled light to fundamental frequency light, be used for being folded to form collapsible optical resonator and coupling output green laser;
Nonlinear crystal receives the fundamental frequency light of output coupling mirror reflection and fundamental frequency light is carried out optical frequency-doubling;
Chamber, the anti-rear end of height mirror, all high anti-to fundamental frequency light and frequency doubled light, be used for reception from the emergent light of nonlinear crystal and be reflected back nonlinear crystal, after the nonlinear crystal frequency multiplication, transport to output coupling mirror.
Described gain media mirror and output coupling mirror form the first folding arm, and end mirror forms the second folding arm behind output coupling mirror and the resonant cavity.
2. free space pumping External-Cavity Surface-Emitting green (light) laser according to claim 1, it is characterized in that: described free space pumping partly comprises:
Incident light source forms the pump beam array by semiconductor laser array;
Light-beam forming unit carries out shaping to the pump beam array, synthesizes a branch of pump light.
3. free space pumping External-Cavity Surface-Emitting green (light) laser according to claim 1, it is characterized in that: described nonlinear crystal position is adjustable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105441035A CN103036138A (en) | 2012-12-14 | 2012-12-14 | Free space pumping outer cavity surface green ray emitting laser |
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| CN2012105441035A CN103036138A (en) | 2012-12-14 | 2012-12-14 | Free space pumping outer cavity surface green ray emitting laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061413A (en) * | 2019-05-27 | 2019-07-26 | 青岛镭视光电科技有限公司 | Self-frequency-doubling crystal, generating device of laser and laser with refrative cavity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101001002A (en) * | 2006-01-10 | 2007-07-18 | 三星电子株式会社 | Vertical external cavity surface emitting laser including second harmonic generation crystal having mirror surface |
| CN101005195A (en) * | 2006-01-18 | 2007-07-25 | 三星电子株式会社 | Vertical external cavity surface emitting laser (vecsel) |
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2012
- 2012-12-14 CN CN2012105441035A patent/CN103036138A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101001002A (en) * | 2006-01-10 | 2007-07-18 | 三星电子株式会社 | Vertical external cavity surface emitting laser including second harmonic generation crystal having mirror surface |
| CN101005195A (en) * | 2006-01-18 | 2007-07-25 | 三星电子株式会社 | Vertical external cavity surface emitting laser (vecsel) |
Non-Patent Citations (1)
| Title |
|---|
| 宋晏蓉等: "光抽运垂直外腔面发射半导体倍频滤光激光器", 《中国激光》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061413A (en) * | 2019-05-27 | 2019-07-26 | 青岛镭视光电科技有限公司 | Self-frequency-doubling crystal, generating device of laser and laser with refrative cavity |
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Application publication date: 20130410 |