CN103368050A - Optical pumping device for weakly adsorbing gain medium - Google Patents
Optical pumping device for weakly adsorbing gain medium Download PDFInfo
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- CN103368050A CN103368050A CN2013102824514A CN201310282451A CN103368050A CN 103368050 A CN103368050 A CN 103368050A CN 2013102824514 A CN2013102824514 A CN 2013102824514A CN 201310282451 A CN201310282451 A CN 201310282451A CN 103368050 A CN103368050 A CN 103368050A
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Abstract
The invention belongs to the field of laser engineering and discloses an optical pumping device for weakly adsorbing a gain medium. The device mainly comprises an unsteady optical resonant cavity, the gain medium and an output mirror, wherein the unsteady optical resonant cavity is formed by a primary mirror and a secondary mirror; and the output mirror is plated with a bicolor film layer. The output mirror is plated with the bicolor film layer, so that the output mirror has high reflectivity for a maser wavelength and has high permeability for a pump light wavelength; pump light is injected in the direction opposite to the unsteady optical resonant cavity and by utilizing a convergence wave effect of the unsteady optical resonant cavity, the gain medium is injected into an optical axis region after the pump light is repeatedly subjected to convergence reinforcement, so that pumping intensity is improved; and the pump light which is not adsorbed by the gain medium is diffused again in the optical axis region at the center of the unsteady optical resonant cavity so as to implement multipass and overlapped adsorption, thereby further improving the pumping intensity. The optical pumping device for weakly adsorbing the gain medium, which is disclosed by the invention, has a simple structure and allows expansion of the number of the pump light; and the pumping intensity and the adsorption distance can be effectively improved.
Description
Technical field
The invention belongs to the laser engineering field, relate to a kind of optical pumping device for weak absorption gain media.
Background technology
At present, optical pumping structure mainly comprises the modes such as one way pump technology, round trip pump technology and oblique journey pump technology.The main feature of different pump modes has: (1) one way pump technology: this technical pattern is simple, need not to add isolator before pump laser, but absorptive pumping light is limited in one's ability, can't improve the efficient of light pumped laser; (2) round trip pump technology: can realize that at most round trip absorbs, can improve absorption efficiency to a certain extent, but must before pump laser, add isolator, prevent that pump light from turning back to pump laser, disturb the pump laser operating state; (3) oblique journey pump technology: this technology is to the no requirement (NR) of cavity mirror plating film, but complex structure, the bad coupling of pump light pattern and zlasing mode.
Summary of the invention
The present invention is used for realizing the weak efficient pumping that absorbs light pumped laser, relates to following demand:
(1) making pump light and laser coexist as one simply in the compact structure, does not interfere with each other;
(2) make pump light obtain operative constraint, realize that repeatedly coming and going in gain media absorbs;
(3) pump light intensities is effectively strengthened, realize the high strength pumping to gain media;
The object of the invention is to by a kind of novel laser structure, solve the weak gain media that absorbs and need to repeatedly come and go the problem that absorbs to pump light, solution need improve the problem of pump intensity simultaneously, solves the problem of laser structure complexity.
The technical solution used in the present invention is:
A kind of optical pumping device for weak absorption gain media, comprise gain media 4 resonant cavity, described resonant cavity comprises primary mirror 1, secondary mirror 2 and outgoing mirror 3, described primary mirror 1 is concave mirror, secondary mirror 2 is convex reflecting mirror or concave mirror, primary mirror 1 and secondary mirror 2 consist of empty confocal arrangement according to confocal point mode arranged in co-axial alignment; Described gain media 4 is placed on the axis zone of primary mirror 1 and secondary mirror 2; Borehole in the middle of the described outgoing mirror 3, the shape in described hole can have any shape, size is less than the size of gain media, outgoing mirror 3 is between primary mirror 1 and secondary mirror 2, near secondary mirror 2 slant settings, outgoing mirror 3 plates optical maser wavelength highly reflecting films layer near primary mirror 1 one sides, and at two plated surface pumping wavelength anti-reflection films.
Pump beam oppositely enters described resonant cavity from secondary mirror 2 one sides, through injecting described gain media 4 in the optical axis zone after repeatedly converging, is not again dispersed in the optical axis zone by the pump light that gain media absorbs, and refills described gain media 4.
Further, described outgoing mirror 3 is the 30-60 degree with respect to the angle of inclination of optical axis.
Further, described outgoing mirror 3 is 45 degree with respect to the angle of inclination of optical axis.
Further, described gain media is to have the stable molecule gain media of absorption in over-frequency band or have the quasi-molecule gain media of weak absorption band or be rare-earth-ion-doped disc solid state gain medium near absorbing main peak.
Further, described stable molecule gain media with absorption in over-frequency band is HF, DF, HCl, HBr, CO and CO
2In one or more gases.
Further, having the quasi-molecule gain media of weak absorption band near the described absorption main peak is CsRb or RbAr.
Further, described rare-earth-ion-doped disc solid state gain medium is for being mixed with Nd
3+Or Yb
3+The disc solid state gain medium of rare earth ion.
The present invention is at the double-colored rete of outgoing mirror plating of astable optical resonator, it is grown tall instead to laser wave, thoroughly high to the pump light wavelength, pump light is injected from the opposite direction of astable optical resonator, utilize the wave effect that converges of astable optical resonator, make pump light after repeatedly converging enhancing, inject gain media in the optical axis zone, improve pump intensity; The pump light that is not absorbed by gain media is dispersed again in astable optical resonator central optical axis zone, realizes multipass, overlapping absorption, further improves pump intensity.
The present invention compared with prior art, the technique effect of obtaining is:
1, the present invention has utilized traditional astable optical resonator structures, does not increase additional components;
2, pump light of the present invention and laser effective separation, both are non-coaxial, can allow pump light quantity to expand on the structure;
3, the present invention has utilized the wave effect that converges of being inverted astable optical resonator structures, and can effectively increase pump intensity;
4, the present invention can constrain in pump light in the astable optical resonator, realizes repeatedly round-trip transmission, can significantly increase effective absorption distance.
Description of drawings
Fig. 1 is for just propping up empty confocal astable optical resonator pumping configuration schematic diagram;
Fig. 2 is negative empty confocal astable optical resonator pumping configuration schematic diagram.
Embodiment
The invention will be further described below in conjunction with concrete the drawings and specific embodiments.
Be illustrated in figure 1 as first embodiment of the present invention, number in the figure is: 1. concave surface primary mirror; 2. convex surface secondary mirror; 3. outgoing mirror; 4. gain media; 5. pump beam; 6. laser beam.
Primary mirror 1 and secondary mirror 2 consist of empty confocal astable optical resonator according to confocal point mode arranged in co-axial alignment in the present embodiment, and primary mirror adopts concave mirror, and secondary mirror adopts convex reflecting mirror, forms just propping up empty confocal arrangement.Gain media 4 is placed on the axis zone of primary mirror 1 and secondary mirror 2; Borehole in the middle of the outgoing mirror 3 is placed according to 45 degree near secondary mirror 2, near primary mirror 1 one sides plating optical maser wavelength highly reflecting films layer, laser beam 6 is derived optical resonator; 3 liang of plated surface pumping wavelengths of outgoing mirror anti-reflection film, pump beam 5 oppositely enters astable optical resonator from secondary mirror 2 one sides, and one of every reflection back and forth beam sizes just reduces M doubly, and M is by primary mirror 1 and the secondary mirror 2 common unstable resonator magnification ratios that determine; When pump beam 5 after repeatedly coming back reflective to narrow down to can't to dwindle again, again amplify; Repeatedly by gain media 4, pump beam 5 will be completely absorbed totally through repeatedly.
Be illustrated in figure 2 as second embodiment of the present invention, number in the figure is: 1. concave surface primary mirror; 2. concave surface secondary mirror; 3. outgoing mirror; 4. gain media; 5. pump beam; 6. laser beam.Different from first embodiment is that secondary mirror 2 adopts concave mirror to consist of in the present embodiment, forms a negative empty confocal arrangement.
Gain media is the stable molecule gain media with absorption in over-frequency band among the present invention, such as HF, DF, HCl, HBr, CO and CO
2Deng gas; Perhaps for absorbing near the quasi-molecule gain media that has weak absorption band of main peak, such as gain medias such as CsRb, RbAr; Perhaps be rare-earth ion-doped (such as Nd
3+, Yb
3+Deng) the disc solid state gain medium.
Claims (7)
1. optical pumping device that is used for weak absorption gain media, comprise gain media (4) resonant cavity, it is characterized in that: described resonant cavity comprises primary mirror (1), secondary mirror (2) and outgoing mirror (3), described primary mirror (1) is concave mirror, secondary mirror (2) is convex reflecting mirror or concave mirror, primary mirror (1) and secondary mirror (2) consist of empty confocal arrangement according to confocal point mode arranged in co-axial alignment; Described gain media (4) is placed on the axis zone of primary mirror (1) and secondary mirror (2); Borehole in the middle of the described outgoing mirror (3), the size in described hole is less than the size of gain media, outgoing mirror (3) is positioned between primary mirror (1) and the secondary mirror (2), near secondary mirror (2) slant setting, outgoing mirror (3) plates optical maser wavelength highly reflecting films layer near primary mirror (1) one side, and at two plated surface pumping wavelength anti-reflection films.
2. the optical pumping device for weak absorption gain media according to claim 1, it is characterized in that: described outgoing mirror (3) is the 30-60 degree with respect to the angle of inclination of optical axis.
3. the optical pumping device for weak absorption gain media according to claim 2 is characterized in that: described outgoing mirror (3) is 45 degree with respect to the angle of inclination of optical axis.
4. the optical pumping device for weak absorption gain media according to claim 1 is characterized in that: described gain media is to have the stable molecule gain media of absorption in over-frequency band or have the quasi-molecule gain media of weak absorption band or be rare-earth-ion-doped disc solid state gain medium near absorbing main peak.
5. the optical pumping device for weak absorption gain media according to claim 4, it is characterized in that: described stable molecule gain media with absorption in over-frequency band is HF, DF, HCl, HBr, CO and CO
2In one or more gases.
6. the optical pumping device for weak absorption gain media according to claim 4 is characterized in that: having the quasi-molecule gain media of weak absorption band near the described absorption main peak is CsRb or RbAr.
7. the optical pumping device for weak absorption gain media according to claim 4, it is characterized in that: described rare-earth-ion-doped disc solid state gain medium is for being mixed with Nd
3+Or Yb
3+The disc solid state gain medium of rare earth ion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102824514A CN103368050A (en) | 2013-07-05 | 2013-07-05 | Optical pumping device for weakly adsorbing gain medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102824514A CN103368050A (en) | 2013-07-05 | 2013-07-05 | Optical pumping device for weakly adsorbing gain medium |
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| CN103368050A true CN103368050A (en) | 2013-10-23 |
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| CN2013102824514A Pending CN103368050A (en) | 2013-07-05 | 2013-07-05 | Optical pumping device for weakly adsorbing gain medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488474A (en) * | 2019-09-24 | 2019-11-22 | 西安佐威光电科技有限公司 | A kind of heavy caliber dual paraboloid reflecting module parallel light tube |
Citations (5)
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|---|---|---|---|---|
| US5173907A (en) * | 1991-10-23 | 1992-12-22 | United Technologies Corporation | Modelocked high power laser having an adjoint feedback beam |
| US5615043A (en) * | 1993-05-07 | 1997-03-25 | Lightwave Electronics Co. | Multi-pass light amplifier |
| 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 |
| CN102044832A (en) * | 2010-11-16 | 2011-05-04 | 苏州大恒光学精密机械有限公司 | Multi-optical path sheet type laser amplifier |
| CN103022884A (en) * | 2012-12-26 | 2013-04-03 | 长春理工大学 | Disc laser emitting 305nm continuous laser by pumping of Pr:KYF at 482.5nm |
-
2013
- 2013-07-05 CN CN2013102824514A patent/CN103368050A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5173907A (en) * | 1991-10-23 | 1992-12-22 | United Technologies Corporation | Modelocked high power laser having an adjoint feedback beam |
| US5615043A (en) * | 1993-05-07 | 1997-03-25 | Lightwave Electronics Co. | Multi-pass light amplifier |
| 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 |
| CN102044832A (en) * | 2010-11-16 | 2011-05-04 | 苏州大恒光学精密机械有限公司 | Multi-optical path sheet type laser amplifier |
| CN103022884A (en) * | 2012-12-26 | 2013-04-03 | 长春理工大学 | Disc laser emitting 305nm continuous laser by pumping of Pr:KYF at 482.5nm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488474A (en) * | 2019-09-24 | 2019-11-22 | 西安佐威光电科技有限公司 | A kind of heavy caliber dual paraboloid reflecting module parallel light tube |
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Application publication date: 20131023 |