CN102570260A - Method for regulating resonant cavity - Google Patents
Method for regulating resonant cavity Download PDFInfo
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- CN102570260A CN102570260A CN2011101036399A CN201110103639A CN102570260A CN 102570260 A CN102570260 A CN 102570260A CN 2011101036399 A CN2011101036399 A CN 2011101036399A CN 201110103639 A CN201110103639 A CN 201110103639A CN 102570260 A CN102570260 A CN 102570260A
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Abstract
The invention relates to a method for regulating a resonant cavity. According to the method, a signal light output mirror is arranged at one end of the resonant cavity, so that the signal light output mirror, an end resonant cavity mirror of the resonant cavity and a gain medium form a reference light resonant cavity; under the irradiation of pumping light, the signal light output mirror outputs a reference signal laser as the reference laser; and positions of other reflection cavity mirrors in the resonant cavity can be regulated quickly and accurately by using the reference signal laser beam. Compared with the method for regulating the cavity mirrors by using helium and neon light in the prior art, the method is easier and more accurate, and limitation to a use occasion can be avoided; and the method is particularly suitable for debugging, maintenance and the like of outer field equipment under insufficient conditions. Furthermore, a regulating device only comprises the signal light output mirror, so that the regulating device has a simple structure, and is easy to implement and low in cost.
Description
Technical field
The present invention relates to laser technology field, particularly a kind of method of regulating the resonant cavity of laser amplifier.
Background technology
In the adjustment process of existing laser resonant cavity, adopt the most widely method be with helium neon laser as collimated light, regulate the position of each chamber mirror in the resonant cavity.And for psec ultrashort pulse mode locking oscillator and regenerative amplifier; The length of its resonant cavity is longer usually, representative value more than 1m, and for the structure that makes device compact more; Usually will repeatedly turn back than long light path, this has just increased the quantity of chamber mirror to a certain extent.If adopt He-Ne Lasers to regulate as collimation laser, through the propagation of longer distance, it is big that its spot size becomes, and light intensity dies down simultaneously, and optical elements such as the polarizer in the chamber of in addition regenerating, wave plate have increased difficulty for the adjusting of resonant cavity.In addition, be difficult to obtain He-Ne Lasers, can't realize laser maintenance of products and debugging in the inadequate outfield of some conditions, so, adopt He-Ne Lasers to regulate the restriction that laser can receive a lot of use occasions as collimated light.
Summary of the invention
The technical problem that the present invention will solve provides a kind of control method of resonant cavity, and it not only can regulate resonant cavity quickly and accurately, and can also avoid resonant cavity to regulate the restriction of use occasion, improves ease of use.
For solving the problems of the technologies described above, the present invention provides a kind of control method of resonant cavity, comprises the steps:
Step 1: the first end resonator mirror and the second end resonator mirror are separately positioned on the two ends of resonant cavity light path, gain media is arranged between the first end resonator mirror and the second end resonator mirror and near the first end resonator mirror;
Step 2: at least one reflecting cavity mirror is arranged between the gain media and the second end resonator mirror; Make flashlight outgoing mirror and gain media, the first end resonator mirror form the reference light resonant cavity;
Step 3: making outside pump light get into said reference light resonant cavity through the first end resonator mirror and produce vibration, to reflecting cavity mirror, is position that collimated light adjust reflecting cavity mirror with the reference laser by flashlight outgoing mirror output reference laser;
Step 4: shift out the flashlight outgoing mirror.
Further, said step 2 also comprises: when the flashlight outgoing mirror was put into the resonant cavity light path, signalization light outgoing mirror and gain media, the first end resonator mirror were positioned on the same optical axis.
Further, said gain media is the Nd:YVO4 crystal.
Further, said reflecting cavity mirror is a plurality of, and the light path that a plurality of reflecting cavity mirror forms is repeatedly turned back light warp in resonant cavity.
Further, said reflecting cavity mirror is the plane reflection eyeglass.
Useful technique effect of the present invention is: the present invention adds a flashlight outgoing mirror through the end at resonant cavity; Make this flashlight outgoing mirror form a reference light resonant cavity with the end resonator mirror and the gain media of resonant cavity; This flashlight resonant cavity is exported a reference laser under the irradiation of pump light; Utilize this reference laser can regulate the position of other reflecting cavity mirrors in the resonant cavity quickly and accurately, it is easier that it compares the method for utilizing He-Ne light to regulate the chamber mirror in the prior art, accurately; Can also avoid the use of the restriction of occasion, situation such as the inadequate airfield equipment debugging of the condition that is particularly useful for, maintenance.In addition, this adjusting device only comprises a flashlight outgoing mirror, thus simple in structure, realize easily, with low cost.
Description of drawings
Fig. 1 is installed in the structural representation (filled arrows and hollow arrow are represented direction past, that return light respectively among the figure) in the resonant cavity for adjusting device of the present invention;
Fig. 2 is installed in the structural representation (filled arrows and hollow arrow are represented direction past, that return light respectively among the figure) in the regenerative laser amplifier with resonant cavity shown in Figure 1 for adjusting device of the present invention.
Embodiment
The control method of resonant cavity of the present invention comprises following four steps:
Step 1: the two ends that the first end resonator mirror and the second end resonator mirror are separately positioned on the resonant cavity light path; Gain media is arranged between the first end resonator mirror and the second end resonator mirror and near the first end resonator mirror, at least one reflecting cavity mirror is arranged between the gain media and the second end resonator mirror;
Step 2: with the flashlight outgoing mirror put into the resonant cavity light path near gain media and away from a side of the first end resonator mirror, flashlight outgoing mirror and gain media, the first end resonator mirror are positioned on the same optical axis to form the reference light resonant cavity;
Step 3: making outside pump light get into said reference light resonant cavity through the first end resonator mirror and produce vibration, to reflecting cavity mirror, is position that collimated light adjust reflecting cavity mirror with the reference laser by flashlight outgoing mirror output reference laser;
Step 4: shift out the flashlight outgoing mirror.
Through introducing a concrete resonant cavity and laser, specify the control method of above-mentioned resonant cavity below with this resonant cavity.
Consult Fig. 1, this resonant cavity comprises: one first end resonator mirror 11, one second end resonator mirror 17, gain media 12, flashlight outgoing mirror 2 and at least one reflecting cavity mirror.The first end resonator mirror 11 and the second end resonator mirror 17 are separately positioned on the two ends of resonant cavity light path.Gain media 12 is arranged on first, second end resonator mirror 11, between 17 and near the first end resonator mirror 11.Reflecting cavity mirror can be the plane reflection eyeglass, and in the present embodiment, reflecting cavity mirror is four; Be respectively reflecting cavity mirror 13, reflecting cavity mirror 14, reflecting cavity mirror 15 and reflecting cavity mirror 16; It is arranged between the gain media 12 and the second end resonator mirror 17 and along light path and arranges successively, and these four reflecting cavity mirrors are on same optical axis, the light path of its formation make light in resonant cavity through repeatedly turning back; So that the structure of resonant cavity is compact more, and then shorten the length of resonant cavity.
Said flashlight outgoing mirror 2 is when resonant cavity need be regulated; Be loaded in the resonant cavity; During adjusting; Flashlight outgoing mirror 2 is installed in the resonant cavity and is positioned at the side away from the first end resonator mirror 11 of gain media 12, and flashlight outgoing mirror 2, gain media 12 and the first end resonator mirror 11 are positioned on the same optical axis.
This resonant cavity is when regulating; As input mirror, make the first end resonator mirror 11 and gain media 12, the quasi-optical resonant cavity of flashlight outgoing mirror 2 primordials with the first end resonator mirror 11, this reference light resonant cavity is exported a reference laser under the effect of pump light 3; With the position of this reference laser as collimated light accommodation reflex chamber mirror successively 13,14,15,16; Comprise position, the left and right sides and luffing angle, consistent to guarantee flashlight through the height behind the optical element, by that analogy; Position adjustments until last second end resonator mirror 17 finishes; Flashlight can be returned on former road, and remove the flashlight outgoing mirror 2 that adds in the light path this moment, promptly accomplishes the adjusting of resonant cavity.
Fig. 2 has the structural representation of the regenerative laser amplifier of above-mentioned resonant cavity at the adjustment state; As shown in the figure, this regenerative laser amplifier comprises: first polarizer 101, first wave plate 102, electrooptic crystal 103, Faraday Magneto-optical Isolator 104, second wave plate 105, second polarizer 106, seed source 107 and above-mentioned resonant cavity.Wherein, first wave plate 102 is preferably quarter wave plate, and second wave plate 105 is preferably 1/2 wave plate, electrooptic crystal 103 preferred BBO electrooptic crystals.First wave plate 102 and Faraday Magneto-optical Isolator 104 are separately positioned on the light path both sides of first polarizer 101; Electrooptic crystal 103 is arranged on light path one side away from first polarizer 101 of first wave plate 102; Second wave plate 105 is arranged on light path one side away from first polarizer 101 of Faraday Magneto-optical Isolator 104; Second polarizer 106 is arranged on light path one side away from Faraday Magneto-optical Isolator 104 of second wave plate 105, and seed source 107 is arranged on light path one side away from second wave plate 105 of second polarizer 106.This first polarizer 101, first wave plate 102 and electrooptic crystal 103 all are arranged in the light path of resonant cavity, and at the second end resonator mirror 17 of resonant cavity and between the reflecting cavity mirror 15 near the second end resonator mirror 17.
When this regenerative laser amplifier is regulated, at first be installed in flashlight outgoing mirror 2 in the resonant cavity and be positioned at the side of gain media 12, flashlight outgoing mirror 2 and end resonator mirror 11, gain media 12 are positioned on the same optical axis away from end resonator mirror 11.This end resonator mirror 11, gain media 12 and flashlight outgoing mirror 2 constitute a reference light resonant cavity; This reference light resonant cavity is exported a reference laser under the effect of pump light 3, be collimated light with this reference laser, and accommodation reflex chamber mirror 103,104,105 successively; First polarizer 101; First wave plate 102, electrooptic crystal 103 make the above optical element of its vertical incidence, regulate reflection light point and incident spots coincide that the second end resonator mirror 17 makes first polarizer, 101 place's flashlights; Rotate first wave plate 102; Transmission direction at first polarizer 101 can obtain laser output, and the laser of first polarizer, 101 outputs overlaps through the adjustment of the seed light that Faraday Magneto-optical Isolator 104, second wave plate 105 and second polarizer 106 and seed source 107 send, the picosecond laser that then can obtain to regenerate output.At last, remove the flashlight outgoing mirror 2 that adds in the light path, promptly accomplish the adjusting of laser resonant cavity.
The above is merely of the present invention preferable feasible, and unrestricted protection scope of the present invention, and the equivalent structure that all utilizations specification of the present invention and accompanying drawing content have been done changes, and all is included in protection scope of the present invention.
Claims (5)
1. the control method of a resonant cavity is characterized in that, comprises the steps:
Step 1: the first end resonator mirror and the second end resonator mirror are separately positioned on the two ends of resonant cavity light path, gain media is arranged between the first end resonator mirror and the second end resonator mirror and near the first end resonator mirror;
Step 2: at least one reflecting cavity mirror is arranged between the gain media and the second end resonator mirror; Make flashlight outgoing mirror and gain media, the first end resonator mirror form the reference light resonant cavity;
Step 3: making outside pump light get into said reference light resonant cavity through the first end resonator mirror and produce vibration, to reflecting cavity mirror, is position that collimated light adjust reflecting cavity mirror with the reference laser by flashlight outgoing mirror output reference laser;
Step 4: shift out the flashlight outgoing mirror.
2. the control method of resonant cavity as claimed in claim 1 is characterized in that, said step 2 also comprises: when the flashlight outgoing mirror was put into the resonant cavity light path, signalization light outgoing mirror and gain media, the first end resonator mirror were positioned on the same optical axis.
3. the control method of resonant cavity as claimed in claim 1 is characterized in that, said gain media is the Nd:YVO4 crystal.
4. the control method of resonant cavity as claimed in claim 1 is characterized in that, said reflecting cavity mirror is a plurality of, and the light path that a plurality of reflecting cavity mirror forms is repeatedly turned back light warp in resonant cavity.
5. the control method of resonant cavity as claimed in claim 1 is characterized in that, said reflecting cavity mirror is the plane reflection eyeglass.
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| CN2011101036399A CN102570260A (en) | 2011-02-25 | 2011-04-25 | Method for regulating resonant cavity |
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| CN201110045901 | 2011-02-25 | ||
| CN201110045901.9 | 2011-02-25 | ||
| CN2011101036399A CN102570260A (en) | 2011-02-25 | 2011-04-25 | Method for regulating resonant cavity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916331A (en) * | 2012-11-05 | 2013-02-06 | 大恒新纪元科技股份有限公司 | Method for debugging folded laser resonant cavity |
| CN104577684A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院光电研究院 | Dual-cavity excimer laser adopting dual-pass structure |
| CN105680300A (en) * | 2016-04-29 | 2016-06-15 | 江苏师范大学 | Accurate calibration method for He-Ne |
| CN109326948A (en) * | 2018-09-30 | 2019-02-12 | 大恒新纪元科技股份有限公司 | A kind of adjustment method of semiconductor laser pumping Solid State Laser refrative cavity |
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| US4792765A (en) * | 1986-09-19 | 1988-12-20 | United Technologies Corporation | Laser resonator with high aspect ratio gain region and azimuthally symmetric Fresnel number |
| JP2002171015A (en) * | 2000-11-30 | 2002-06-14 | Japan Science & Technology Corp | Resonator-length variable laser resonator and pulse laser light source device |
| CN101098065A (en) * | 2007-07-06 | 2008-01-02 | 中国人民解放军国防科学技术大学 | Unstable resonator automatic cavity-adjusting system and method using self-collimation feedback light path |
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2011
- 2011-04-25 CN CN2011101036399A patent/CN102570260A/en active Pending
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| US4792765A (en) * | 1986-09-19 | 1988-12-20 | United Technologies Corporation | Laser resonator with high aspect ratio gain region and azimuthally symmetric Fresnel number |
| JP2002171015A (en) * | 2000-11-30 | 2002-06-14 | Japan Science & Technology Corp | Resonator-length variable laser resonator and pulse laser light source device |
| CN101098065A (en) * | 2007-07-06 | 2008-01-02 | 中国人民解放军国防科学技术大学 | Unstable resonator automatic cavity-adjusting system and method using self-collimation feedback light path |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916331A (en) * | 2012-11-05 | 2013-02-06 | 大恒新纪元科技股份有限公司 | Method for debugging folded laser resonant cavity |
| CN102916331B (en) * | 2012-11-05 | 2014-05-28 | 大恒新纪元科技股份有限公司 | Method for debugging folded laser resonant cavity |
| CN104577684A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院光电研究院 | Dual-cavity excimer laser adopting dual-pass structure |
| CN105680300A (en) * | 2016-04-29 | 2016-06-15 | 江苏师范大学 | Accurate calibration method for He-Ne |
| CN105680300B (en) * | 2016-04-29 | 2018-09-18 | 江苏师范大学 | A kind of He-Ne essences calibration method |
| CN109326948A (en) * | 2018-09-30 | 2019-02-12 | 大恒新纪元科技股份有限公司 | A kind of adjustment method of semiconductor laser pumping Solid State Laser refrative cavity |
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Application publication date: 20120711 |