CN201247904Y - Small-scale long cavity laser - Google Patents
Small-scale long cavity laser Download PDFInfo
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- CN201247904Y CN201247904Y CNU2008201028413U CN200820102841U CN201247904Y CN 201247904 Y CN201247904 Y CN 201247904Y CN U2008201028413 U CNU2008201028413 U CN U2008201028413U CN 200820102841 U CN200820102841 U CN 200820102841U CN 201247904 Y CN201247904 Y CN 201247904Y
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- laser
- beam expanding
- cavity
- expanding telescope
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Abstract
The utility model relates to a laser, in particular to a small-sized long cavity laser with a beam expanding telescope and an optical path folding reflection cavity. The laser comprises a pump light source, an optical coupling system, a front cavity lens, a laser gain medium and a back cavity lens which are all sequentially arranged. More importantly, the laser also comprises the beam expanding telescope and the optical path folding reflection cavity, wherein the beam expanding telescope is arranged at the back of the laser gain medium to enlarge the diameter of a laser mode field emitted by the laser gain medium; and the optical path folding reflection cavity is arranged at the back of the beam expanding telescope to fold and reflect laser beams and extend the laser light path. A passive mode-locking optical component is arranged between the laser gain medium and the beam expanding telescope to form a small-sized long cavity laser with mode-locked output, or a frequency-doubling crystal is arranged to form a small-sized long cavity laser with low noise output. The utility model has the advantages of simple structure, small size, stable long-cavity output, and the like.
Description
Technical field
The utility model relates to a kind of laser, relates in particular to a kind of undersized long cavity laser with beam expanding telescope and light path folding reflection cavity.
Background technology
In common mode-locked laser, the chamber is long to reach 1 meter-2 meters usually, most of states adopt Z type three chambeies or more the multi-cavity sheet constitute laser, but whole laser volume is still very big.In semiconductor pumped intracavity frequency doubling laser, for obtaining low noise, people also adopt long chamber many longitudinal modes bundle cancellation green glow noise on the other hand.Patent 200520069615.6, the refrative cavity structure is proposed to reduce volume, it is by being made up of in same planar alignment the rhombic prism group, be integral by gluing between the rhombic prism, perhaps rhombic prism independence and certain intervals is arranged separately perhaps is made up of two groups of right-angle prism combination optical media, again, optical medium is arranged between the right-angle prism, and is integral by gluing, perhaps adopts the optical glass of light-plated total reflection film.Small size long chamber output can be realized in its common simple chamber, but is difficult for realizing the stable output in long chamber.
Summary of the invention
For realizing a kind of undersized and stable laser of exporting in long chamber, the utility model adopts following technical scheme:
A kind of undersized long cavity laser of the present utility model comprises pump light source, optical coupling system, ante-chamber eyeglass, gain medium, back cavity eyeglass, and described each parts are arranged in order.Main, also comprise beam expanding telescope, light path folding reflection cavity.After described beam expanding telescope is arranged at gain medium, expansion of laser light gain media emitting laser mode field diameter; After described light path folding reflection cavity was arranged at beam expanding telescope, folding reflection lasering beam prolonged laser optical path.
Further, described beam expanding telescope is the transmission-type beam expanding telescope.
Further, described light path folding reflection cavity is two plane-parallel mirror groups.Perhaps described light path folding reflection cavity is some right-angle prism groups.
Further, between described gain medium and described beam expanding telescope, the passive mode locking optical element is set, constitutes the long cavate laser of small size of locked mode output.
Further, described passive mode locking optical element is coordinated Q crystal or semiconductor absorber SSAM.
Further, perhaps between described gain medium and described beam expanding telescope, frequency-doubling crystal is set, constitutes the long cavate laser of small size of low noise output.
Above-described each optical element can discretely be arranged and be constituted or described each optical element is combined on the identical platform, constitutes single whole small size device.
Because the employing technique scheme the utlity model has size little and long chamber output and stablizes cancellation green glow noise.Then can constitute the small size mode-locked laser if in the chamber, add the passive mode locking optical element.
Description of drawings
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is that light path folding reflection cavity of the present utility model adopts two plane-parallel mirror group schematic diagrames;
Fig. 3 is that passive mode locking optical element of the present utility model adds rhombic prism or other form total internal reflection prism schematic diagrames;
Fig. 4 is that light path folding reflection cavity of the present utility model adopts some right-angle prism group structure charts;
Fig. 5 is the utility model most preferred embodiment schematic diagram.
Embodiment
Now in conjunction with the accompanying drawings the utility model is further specified.
As Fig. 1, shown in Figure 5, a kind of undersized long cavity laser of the present utility model, comprise pump light source (108), optical coupling system (107), ante-chamber eyeglass (101), gain medium (102), back cavity eyeglass (105), described each parts are arranged in order.Main, also comprise beam expanding telescope (104), light path folding reflection cavity (304).After described beam expanding telescope (104) is arranged at gain medium (102), expansion of laser light gain media (102) emitting laser mode field diameter; After described light path folding reflection cavity (304) was arranged at beam expanding telescope (104), folding reflection lasering beam prolonged laser optical path.
Operation principle of the present utility model places laser cavity with beam expanding telescope (104) exactly, to expand bundle to satisfy long chamber Len req from gain medium (102) emitting laser mode field diameter by beam expanding telescope (104), the endovenous laser behind the expansion bundle repeatedly reflects by small size or full injection folded optical path constitutes the long cavity laser of small size.
Further, described beam expanding telescope (104) is the transmission-type beam expanding telescope.Usually beam expanding telescope is reflective beam expanding telescope, and folded optical path is difficult for regulating, and the utility model adopts the transmission-type beam-expanding system more easy to operate.
As Fig. 2, shown in Figure 3, described light path folding reflection cavity is two plane-parallel mirror groups.Two plane-parallel mirrors (106A, 106B) realize that laser repeatedly reflects to reduce the laser size significantly in the laser cavity, because through beam expanding telescope (104), its laser beam is similar to directional light, then can be in parallel plane reflection repeatedly reflecting surface do not influence beam quality.
Further, between described gain medium (102) and described beam expanding telescope (104), passive mode locking optical element (103) is set, constitutes the long cavate laser of small size of locked mode output.
Further, described passive mode locking optical element (103) is coordinated Q crystal or semiconductor absorber SSAM.
As shown in Figure 3, introduce rhombic prism or other form total internal reflection prisms (1031), is one with passive mode locking optical element (103) by optical cement or in-depth optical cement with rhombic prism or other form total internal reflection prisms (1031), adopts prism can avoid aberration.The locked mode material of facing semiconductor absorber formula adopts with total internal reflection prism and can further reduce the complex structure that common low-angle reflection brings by in-depth optical cement mode.
Gain medium (102), passive mode locking optical element (103) can be less near front cavity mirror (101) fundamental mode volume, thereby can make gain medium (102) obtain higher oblique efficient, in passive mode locking optical element (103), obtain enough power densities simultaneously, optical mirror slip group (104A, 104B) constitutes beam expanding telescope (104) can make basic mode enlarged-diameter in the laser cavity, and long reach still keeps laser cavity to be in stable state thereby make beam expanding telescope (104) have very to back cavity eyeglass (105).
As shown in Figure 4, described light path folding reflection cavity (304) also can constitute for some right-angle prism groups.Two vertical planes of right-angle prism (305) are coated with complete reflectance coating, and laser optical path reflects between each right-angle prism (305), thereby obtain long light path.
Further, perhaps between described gain medium and described beam expanding telescope, frequency-doubling crystal is set, then can constitutes the long cavate laser of small size of low noise output.
As shown in Figure 5, be the schematic diagram of most preferred embodiment of the present utility model.102 are gain medium and be coated with the ante-chamber film, replace ante-chamber eyeglass (101), 103 is the passive mode locking optical element, gain medium (102) can be combined as a whole with passive mode locking optical element (103), 104 is beam expanding telescope, 304 is that one group of right-angle prism constitutes the light path folding reflection cavity, 305 are band reflectance coating right-angle prism, 306 is substrate, passive mode locking optical element (103), beam expanding telescope (104), right-angle prism constitutes light path folding reflection cavity (304), substrate (306) can be combined into single integral body, and 108 is the semiconductor pumping sources laser, 107 is coupled lens, and then its integral body can constitute single whole small size laser.
Above-described each optical element can discretely be arranged and be constituted or described each optical element is combined on the identical platform, constitutes single whole small size device.
The utility model to improve this regional power density, down obtains better locked mode effect thereby realize hanging down pump power owing to adopt transmission-type telescope chamber can make gain medium and locked mode optical element in the less basic mode size work of very short length.
Claims (11)
1, a kind of undersized long cavity laser comprises pump light source, optical coupling system, ante-chamber eyeglass, gain medium, back cavity eyeglass, and described each parts are arranged in order, and it is characterized in that: also comprise beam expanding telescope, light path folding reflection cavity; After described beam expanding telescope is arranged at gain medium, expansion of laser light gain media emitting laser mode field diameter; After described light path folding reflection cavity was arranged at beam expanding telescope, folding reflection lasering beam prolonged laser optical path.
2, undersized long cavity laser as claimed in claim 1, it is characterized in that: described beam expanding telescope is the transmission-type beam expanding telescope.
3, undersized long cavity laser as claimed in claim 1 is characterized in that: described light path folding reflection cavity is two plane-parallel mirror groups.
4, undersized long cavity laser as claimed in claim 1 is characterized in that: described light path folding reflection cavity is some right-angle prism groups.
5, as the arbitrary described undersized long cavity laser of claim 1-4, it is characterized in that: between described gain medium and described beam expanding telescope, the passive mode locking optical element is set.
6, as the arbitrary described undersized long cavity laser of claim 1-4, it is characterized in that: between described gain medium and described beam expanding telescope, frequency-doubling crystal is set.
7, undersized long cavity laser as claimed in claim 5 is characterized in that: between described gain medium and described beam expanding telescope frequency-doubling crystal is set.
8, undersized long cavity laser as claimed in claim 5 is characterized in that: described passive mode locking optical element is coordinated Q crystal or semiconductor absorber SSAM.
9, as claim 1,2,3,4,7,8 arbitrary described undersized long cavity lasers is characterized in that: described each optical element is discrete arranges or described each optical element is combined on the identical platform, constitutes single whole small size device.
10, undersized long cavity laser as claimed in claim 5 is characterized in that: described each optical element is discrete arranges or described each optical element is combined on the identical platform, constitutes single whole small size device.
11, undersized long cavity laser as claimed in claim 6 is characterized in that: described each optical element is discrete arranges or described each optical element is combined on the identical platform, constitutes single whole small size device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201028413U CN201247904Y (en) | 2008-06-26 | 2008-06-26 | Small-scale long cavity laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201028413U CN201247904Y (en) | 2008-06-26 | 2008-06-26 | Small-scale long cavity laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247904Y true CN201247904Y (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201028413U Expired - Fee Related CN201247904Y (en) | 2008-06-26 | 2008-06-26 | Small-scale long cavity laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132644A (en) * | 2016-02-29 | 2017-09-05 | 西安诺瓦电子科技有限公司 | Image detection device and optics cavity |
| CN107132645A (en) * | 2016-02-29 | 2017-09-05 | 西安诺瓦电子科技有限公司 | Image detection device and optics cavity |
-
2008
- 2008-06-26 CN CNU2008201028413U patent/CN201247904Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132644A (en) * | 2016-02-29 | 2017-09-05 | 西安诺瓦电子科技有限公司 | Image detection device and optics cavity |
| CN107132645A (en) * | 2016-02-29 | 2017-09-05 | 西安诺瓦电子科技有限公司 | Image detection device and optics cavity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20130626 |