CN101969176A - Laser cavity structure - Google Patents
Laser cavity structure Download PDFInfo
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- CN101969176A CN101969176A CN 201010529981 CN201010529981A CN101969176A CN 101969176 A CN101969176 A CN 101969176A CN 201010529981 CN201010529981 CN 201010529981 CN 201010529981 A CN201010529981 A CN 201010529981A CN 101969176 A CN101969176 A CN 101969176A
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Abstract
The invention discloses a laser cavity structure which is characterized by aiming at some quasi-four-level laser gain media of which the pump light absorption wavelength is approximate to the transmitted bandwidth short-wave band, such as Yb: series lasers. When a traditional cavity structure is adopted, because the manufacturing process of the high-reflection coating of the traditional cavity structure is relatively difficult, the pump light is injected into a laser crystal from a PBS diaphragm, a PBS prism or a Work-Off crystal in the cavity or the pump light is introduced by utilizing a narrowband etalon in the cavity to realize laser oscillation approximate to the pump light wavelength.
Description
Technical field
Patent of the present invention relates to laser field, particularly relates to a kind of laser cavity structure.
Background technology
Some its pump light absorbing wavelength of accurate four-level gain medium and transmitted bandwidth short-wave band are approaching, our common Yb for example: series laser (seeing accompanying drawing 6, accompanying drawing 7), have advantages such as volume is little, life-span length, compact conformation such as the Yb:YAG laser owing to it, in laser technology, laser biology, laser medicine, there is important application aspects such as environmental optics, laser processing.At Yb: in the serial crystal material, its energy level four level system that is as the criterion, have that thermal effect is little, thermal conductivity, characteristics such as highly doped, but its absorption band and fluorescent belt overlap, if will obtain laser output, just need be coated with and realize the high saturating and high anti-high-reflecting film of oscillation light of pump light simultaneously near pumping wavelength.
Traditional thought, straight chamber generally commonly used cavity configuration plates pump light high transmittance film and oscillation light high-reflecting film simultaneously to the input coupling mirror, and this joint back cavity type is simple, regulate easily, but above-mentioned film system makes comparatively difficulty, and cost is higher.
Chen Changshui etc. are to propose a kind of like this structure in 03221873.7 the utility model patent " single-side pumping solidifies Yb:YAG piece laser entirely " at application number: the laser crystal surface of diode pumping and the laser crystal surface isolation as laser resonant cavity; The transmission film of the pumping coupled surface plating 940nm of laser crystal, the total reflection film of its parallel surface plating 940nm; Two parallel surfaces in addition of laser crystal are plated the total reflection film of 1030nm and the partial reflection film of 1030nm respectively, constitute the laserresonator of laser, obtain the output of the full Yb:YAG of curing continuous laser, this structure avoids above-mentioned high-reflecting film to make difficult this problem by the side pump in fact, but for the laser system of end pump, the method just can't be suitable for.
Summary of the invention
At the problems referred to above, this patent purpose is to design a kind of laser cavity structure, reaches the injection of easy realization pump light and the vibration of laser.
For achieving the above object, the technical scheme that the present invention proposes is: a kind of laser cavity structure, comprise laser crystal, concave mirror, the laser crystal left side is coated with pump light and oscillation light high-reflecting film, concave mirror is coated with oscillation light partial reflection film, it is characterized in that between laser cavity inner laser crystal and concave mirror, also having a pump light that pumping source is sent to inject laser crystal by refraction introducing or reflection, and to the high saturating optics of oscillating laser, and then the purpose of the vibration of the injection of realization pump light and laser.
Further, the preferred PBS diaphragm of described optics, PBS prism or Work-Off crystal or arrowband etalon.
Further, adopt in the structure of PBS diaphragm or PBS prism or Work-Off crystal, laser crystal is preferably the crystal with polarization emission characteristics, as Nd:YVO
4Deng.
Further, adopt in the structure of PBS diaphragm or PBS prism or Work-Off crystal, pumping source and laser crystal are launched preferred linear polarization emission, and two linear polarizations are vertical.
Further, adopt in the structure of arrowband etalon, pumping source and laser crystal emission can be polarization also can be non-linear polarization.
Further, adopt the laser cavity structure of above-mentioned any optics, can also add the expansion that nonlinear crystal is realized frequency, as frequency-doubling crystal.
Description of drawings
Fig. 1 is a system construction drawing of the present invention;
Fig. 2 is an one of embodiment of the invention structure chart;
Fig. 3 is two structure charts of the embodiment of the invention;
Fig. 4 is three structure charts of the embodiment of the invention;
Fig. 5 be the embodiment of the invention three in arrowband etalon transmission curve;
Fig. 6 is the absorption cross-section characteristic curve of Yb:YAG;
Fig. 7 is a Yb:YAG crystallofluorescence spectrum.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Shown in accompanying drawing one system construction drawing of the present invention, a kind of laser cavity structure, it is characterized in that, between laser crystal 1 and concave mirror 3, also have an optics 2, this optics is introduced by refraction by pump light 21 or laser crystal 1 is injected in reflection, and this optics 2 is also high saturating to oscillating laser, and form laser cavities with the concave mirror 3 that is coated with oscillation light partial reflection film, produce laser and penetrate from concave mirror 3.
Embodiment one: shown in accompanying drawing two, optics adopts PBS prism 201, in the chamber, insert a kind of structure that PBS prism 201 is introduced pump light, inject PBS prism 201 after linear polarization pump light process lens that diode 5 sends or the set of lenses 4, reflection is passed through PBS prism 201 post-concentrations in laser crystal 1 inside, PBS prism 201 is simultaneously to the oscillating laser transmission of linear polarization, laser crystal 1 left side is coated with simultaneously to pump light and oscillation light high-reflecting film, form laser cavity with the concave mirror 3 that is coated with oscillation light partial reflection film, produce laser and penetrate from concave mirror 3, pump light wherein is vertical mutually with the polarization direction of oscillating laser.
Embodiment two: shown in accompanying drawing three, optics is a Work-Off crystal 2 02, linear polarization pump light e light is injected Work-Off crystal 2 02 after through a prism 204 deviations, through injecting laser crystal inside behind the Work-Off crystal, plate simultaneously to pump light and oscillation light high-reflecting film laser crystal 1 left side, form laser cavity with the concave mirror that is coated with oscillation light partial reflection film, produce laser from the concave mirror outgoing.Pump light is vertical mutually with the polarization direction of oscillating laser.
Embodiment three: shown in accompanying drawing four, optics is an arrowband etalon 203, introduces a kind of structure of pump light by arrowband etalon 203, and this arrowband etalon 203 is designed to realize to oscillation light for high saturating, to pump light is high anti-, and transmission curve as shown in Figure 5.Laser crystal 1 left side is coated with simultaneously to pump light and oscillation light high-reflecting film, forms laser cavity with the concave mirror 3 that is coated with oscillation light partial reflection film, produces laser and penetrates from concave mirror 3.This structure and pumping polarization irrelevant are applicable to the pumped fiber light source in addition, but because the characteristic of etalon itself, system's Insertion Loss is relatively large.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present invention that do not break away from appended claims and limited; can make various variations to the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. laser cavity structure, comprise laser crystal, concave mirror, the laser crystal left side is coated with pump light and oscillation light high-reflecting film, concave mirror is coated with oscillation light partial reflection film, it is characterized in that between laser cavity inner laser crystal and concave mirror, also having a pump light that pump light source is sent to inject laser crystal by refraction introducing or reflection, and to the high saturating optics of oscillating laser.
2. a kind of laser cavity structure as claimed in claim 1 is characterized in that described optics is PBS diaphragm or PBS prism.
3. a kind of laser cavity structure as claimed in claim 1 is characterized in that described optics is the Work-Off crystal.
4. a kind of laser cavity structure as claimed in claim 1 is characterized in that described optics is the arrowband etalon.
5. as claim 2 or 3 described a kind of laser cavity structures, it is characterized in that described laser crystal is the crystal with polarization emission characteristics.
6. a kind of laser cavity structure as claimed in claim 5 is characterized in that described laser crystal is Nd:YVO
4
7. a kind of laser cavity structure as claimed in claim 3 is characterized in that also comprising one with the prism behind the pump light e light deflection, and this prism is between pump light source and Work-Off crystal.
8. as claim 2 or 3 described a kind of laser cavity structures, it is characterized in that pumping source and laser crystal are emitted as the linear polarization emission, and two linear polarizations are vertical.
9. a kind of laser cavity structure as claimed in claim 4, it is characterized in that pumping source and laser crystal the emission can be polarization also can be non-linear polarization.
10. as the described a kind of laser cavity structure of the arbitrary claim of claim 1-4, it is characterized in that going in the chamber nonlinear crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529981 CN101969176A (en) | 2010-11-03 | 2010-11-03 | Laser cavity structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529981 CN101969176A (en) | 2010-11-03 | 2010-11-03 | Laser cavity structure |
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| CN101969176A true CN101969176A (en) | 2011-02-09 |
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| CN 201010529981 Pending CN101969176A (en) | 2010-11-03 | 2010-11-03 | Laser cavity structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390211A (en) * | 1993-08-24 | 1995-02-14 | Spectra-Physics Lasers, Inc. | Optical parametric oscillator with unstable resonator |
| US20040095981A1 (en) * | 2002-11-19 | 2004-05-20 | Masayuki Momiuchi | Solid-state laser device |
| CN2762397Y (en) * | 2005-01-01 | 2006-03-01 | 吴砺 | Semiconductor pumped solid laser of multi-stage end-pumpeding |
| CN200947526Y (en) * | 2006-09-11 | 2007-09-12 | 福州高意通讯有限公司 | Semiconductor end pumped micro laser |
| CN201541050U (en) * | 2009-12-16 | 2010-08-04 | 温州市嘉泰激光科技有限公司 | Double-output end-face pump whole solid state laser |
-
2010
- 2010-11-03 CN CN 201010529981 patent/CN101969176A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390211A (en) * | 1993-08-24 | 1995-02-14 | Spectra-Physics Lasers, Inc. | Optical parametric oscillator with unstable resonator |
| US20040095981A1 (en) * | 2002-11-19 | 2004-05-20 | Masayuki Momiuchi | Solid-state laser device |
| CN2762397Y (en) * | 2005-01-01 | 2006-03-01 | 吴砺 | Semiconductor pumped solid laser of multi-stage end-pumpeding |
| CN200947526Y (en) * | 2006-09-11 | 2007-09-12 | 福州高意通讯有限公司 | Semiconductor end pumped micro laser |
| CN201541050U (en) * | 2009-12-16 | 2010-08-04 | 温州市嘉泰激光科技有限公司 | Double-output end-face pump whole solid state laser |
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Application publication date: 20110209 |