CN101364704B - Micro chip type sum frequency laser - Google Patents
Micro chip type sum frequency laser Download PDFInfo
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- CN101364704B CN101364704B CN2008100986104A CN200810098610A CN101364704B CN 101364704 B CN101364704 B CN 101364704B CN 2008100986104 A CN2008100986104 A CN 2008100986104A CN 200810098610 A CN200810098610 A CN 200810098610A CN 101364704 B CN101364704 B CN 101364704B
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Abstract
The invention relates to the laser field, particularly to a microchip sum-frequency laser of a composite resonant cavity formed by adopting a simple optical element. The sum-frequency laser comprises two pump lasers, two pump optical coupling systems and the composite resonant cavity; pump light of the two pump lasers respectively travels through the pump optical coupling systems to relatively enter both sides of the composite resonant cavity; the composite resonant cavity adopts two pieces of gain mediums; the composite cavities of two laser resonant cavities are formed on a nonlinear sum-frequency crystal; meanwhile, a frequency doubling crystal is arranged at the overlap part of the two cavities; each of the two laser resonant cavities is provided with a cavity piece, which is arranged in the other cavity, and the two cavity pieces form a sum-frequency resonant cavity; different polarizing optical elements are arranged according to different gain mediums. Therefore, the sum-frequency laser has the advantages of reasonable and simple structure, small volume and easy mass production.
Description
Technical field
The present invention relates to field of lasers, relate in particular to a kind of adopt microchip that simple optical elements constitutes composite resonant cavity and frequency laser.
Background technology
Traditional generally comprises semiconductor laser with frequency laser, optical coupling system, reflecting cavity mirror, gain medium and frequency crystal, two output coupling mirrors; On the optical axis of the semiconductor laser emitted laser bundle direction of propagation, the focal plane of optical coupling system drops in the gain medium, reflecting cavity mirror and two output coupling mirrors constitute two laserresonators with intersection, with the frequency crystal in two resonant cavitys, during laser works, produce the transition of two different wave lengths in the gain medium, two fundamental frequency light are arranged, outside fundamental frequency light passes through and crystal generation frequently the is new wavelength and frequency light and output cavity respectively at two internal oscillations.
Usually constitute Compound Cavity by PBS film or Walk-off crystal with frequency laser, adopt separate type more, thereby integrally-regulated, shortcoming is that complex structure is not easy to operate.
Summary of the invention
At the deficiency of existing and frequency laser laser technique, the invention provides a kind of simple, microchip and frequency laser that volume is little rational in infrastructure.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
The present invention includes two pump lasers, two pump optical coupled systems and composite resonant cavity, the pump light of two pump lasers enters the both sides of composite resonant cavity respectively relatively by the pump optical coupled system, main,
A chamber sheet also is set in one of them pump optical coupled system, and this chamber sheet is to the pump light transmission, to exporting the light reflection with frequency;
Described composite resonant cavity, adopt two gain medias, Compound Cavity and frequency crystal that non-linear and frequency crystal constitutes two laserresonators place two chamber laps simultaneously, these two laserresonators respectively have a chamber sheet in another chamber, and these two chamber sheets constitute and the frequency resonant cavity.
Further, described gain medium is a birefringece crystal, and when having the polarization emission characteristics, can by with the required arrangement gain medium of frequency crystal optical axis direction.
Described gain medium is the uniform gain medium, can not produce when determining the polarization direction polarised light, can add polarisation and learn element in laserresonator.
It can be following three kinds that described polarisation learned element: 1. birefringece crystal angle of wedge sheet is right, angle of wedge sheet to optical axis on same plane; 2.Walk-off crystal; 3. the polarizer that thin Walk-off crystal and planoconvex spotlight constitute.
Certain, the gain medium of composite resonant cavity both sides can be to be birefringece crystal on one side, can by with the required arrangement gain medium of frequency crystal optical axis direction; Be the uniform gain medium on one side, can add in its laserresonator that any plays polarisation element in above-mentioned three kinds.
Described each optical element can bond together by optical cement, in-depth optical cement, gummed.
The utility model adopts two pump lasers, two pump optical coupled systems and composite resonant cavity, the pump light of two pump lasers respectively by the pump optical coupled system enter relatively the both sides of composite resonant cavity and one be arranged in the pump optical coupled system to the pump light transmission, to learning element with the film of frequently exporting the light reflection and the corresponding polarisation that rises, by optical cement, in-depth optical cement or gummed are bonded to an integral body.Therefore, it is rational in infrastructure simply, volume is little, is easy to produce in enormous quantities.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is the utility model first embodiment schematic diagram;
Fig. 3 is the utility model second embodiment schematic diagram;
Fig. 4 is the utility model the 3rd embodiment schematic diagram;
Fig. 5 is the utility model the 4th embodiment schematic diagram;
Fig. 6 is the utility model the 5th embodiment schematic diagram.
Wherein, (101), (103) are pump laser, (102), (104A), (104B) are the pump optical coupled system, (105) be the chamber sheet, (106) for producing wavelength X 1 gain medium, (107) are and the frequency crystal, and (108) are for producing the gain medium of wavelength X 2, (109), (110) be the polarization polarizer, (111), (112) are planoconvex spotlight.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
In conjunction with Fig. 1, operation principle of the present utility model is described.
Wherein, 101,103 is pump laser, 102,104A, 104B are the pump optical coupled system, and 105 is to the pump light transmission, to frequency output reflection chamber sheet, 106 is to produce wavelength X 1 gain medium, and 108 for producing the gain mediums of wavelength X 2, and 107 are and the frequency crystal.
S1 and S3 constitute the resonant cavity of λ 1, and S2 and S4 constitute λ 2 resonant cavitys.S2 is high anti-to λ 2, and to λ 1 transmission, S3 is high anti-to λ 1, to λ 2 transmissions.
Operation principle of the present utility model is: S1 and S2 constitute the chamber and produce in λ 1 and λ 2 chambeies, λ 1 and λ 2 with the frequency crystal in produce wavelength X 3, i.e. 1/ λ 1+1/ λ, 2 → 1/ λ 3, λ 3 is by S3, the S4 transmission is by 105 reflection outputs.Two pump lights are pumping laser gain media respectively from the microplate two ends, guarantee simultaneously to produce λ 1 and λ 2 with the frequency crystal in conllinear.
The utility model comprises two pump lasers, two pump optical coupled systems and composite resonant cavity, and the pump light of two pump lasers enters the both sides of composite resonant cavity respectively relatively by the pump optical coupled system, main,
A chamber sheet also is set in one of them pump optical coupled system, and this chamber sheet is to the pump light transmission, to exporting the light reflection with frequency;
Described composite resonant cavity, adopt two gain medias, Compound Cavity and frequency crystal that non-linear and frequency crystal constitutes two laserresonators place two chamber laps simultaneously, these two laserresonators respectively have a chamber sheet in another chamber, and these two chamber sheets constitute and the frequency resonant cavity.
Because and frequently crystal normally two fixed polarisation state first-harmonics and frequently.This patent has the different cavity structure at the different gains medium.
In general can adopt I class and II quasi-nonlinear crystal with the frequency crystal, identical to the I class two different wave length first-harmonic polarization directions, vertical mutually to two first-harmonic polarization directions of II class.
Further, described gain medium is a birefringece crystal, and when having the polarization emission characteristics, can by with the required arrangement gain medium of frequency crystal optical axis direction.
Described gain medium can not produce when determining the polarization direction polarised light for being the uniform gain medium, can add polarisation and learn element in laserresonator.
Embodiment 1: as Fig. 2, the both sides gain medium of expression composite resonant cavity is all for by the birefringece crystal gain media and do not add the polarizer, and its first-harmonic polarization direction is definite by birefringece crystal gain media oneself.
It can be following three kinds that described polarisation learned element: 1. birefringece crystal angle of wedge sheet is right, angle of wedge sheet to optical axis on same plane; 2.Walk-off crystal; 3. the polarizer that thin Walk-off crystal and planoconvex spotlight constitute.
Fig. 3, Fig. 4, gain media is a uniform dielectric among Fig. 5, promptly gain media itself can not produce fixedly polarization direction, inserts the different polarizers first-harmonic polarization direction is determined.
Embodiment 2: in Fig. 3,109,110 is the birefringece crystal angle of wedge to as the polarizer, the angle of wedge to optical axis on same plane.
Embodiment 3: in Fig. 4,109,110 is the Walk-off crystal, and 111,112 is planoconvex spotlight, 109 and 111,110, the 112 structure polarizers, and promptly thin Walk-off crystal and planoconvex spotlight constitute the polarization polarizer.
Embodiment 4: in Fig. 5,109,110 make the polarizer for the Walk-off crystal, i.e. Walk-off crystal long enough, and its e light direction light causes loss to the edge.
Certain, the gain medium of composite resonant cavity both sides can be to be birefringece crystal on one side, can by with the required arrangement gain medium of frequency crystal optical axis direction; Be the uniform gain medium on one side, can add in its laserresonator that any plays polarisation element in above-mentioned three kinds.
Embodiment 5: in Fig. 6,106 is the birefringece crystal gain media, its polarization direction can be determined by self, and another sheet gain media 108 is the uniform gain medium, in its chamber, insert the polarizer, its polarizer can be that the birefringece crystal crystal angle of wedge is right, the Walk-off crystal, and Walk-off crystal and planoconvex spotlight are right.Each above-mentioned optical element can pass through optical cavity, the in-depth optical cement, and gummed bonds together.
Claims (8)
1. microchip and frequency laser comprise two pump lasers, two pump optical coupled system and composite resonant cavities, and the pump light of two pump lasers enters the both sides of composite resonant cavity respectively relatively by the pump optical coupled system, it is characterized in that: wherein,
One chamber sheet also is set in the one pump optical coupled system, and this chamber sheet is to the pump light transmission, to exporting the light reflection with frequency;
Composite resonant cavity adopts two gain medias, non-linear and frequently crystal constitute the Compound Cavity of dual-laser resonant cavity and frequently crystal place two chamber laps simultaneously, this dual-laser resonant cavity respectively has a chamber sheet in another chamber, this two chambeies sheet constitutes and resonant cavity frequently.
2. a kind of microchip as claimed in claim 1 and frequency laser is characterized in that: described gain medium is a birefringece crystal, and when having the polarization emission characteristics, can by with the required arrangement gain medium of frequency crystal optical axis direction.
3. a kind of microchip as claimed in claim 1 and frequency laser is characterized in that: described gain medium is the uniform gain medium, can not produce when determining the polarization direction polarised light, can add polarisation and learn element in laserresonator.
4. a kind of microchip as claimed in claim 3 and frequency laser is characterized in that: it is that birefringece crystal angle of wedge sheet is right that described polarisation learned element, angle of wedge sheet to optical axis on same plane.
5. a kind of microchip as claimed in claim 3 and frequency laser is characterized in that: it is the Walk-off crystal that described polarisation learned element.
6. a kind of microchip as claimed in claim 3 and frequency laser is characterized in that: it is the polarizer that thin Walk-off crystal and planoconvex spotlight constitute that described polarisation learned element.
7. a kind of microchip as claimed in claim 1 and frequency laser is characterized in that: the gain medium of described composite resonant cavity both sides can be to be on one side birefringece crystal, can by with the required arrangement gain medium of frequency crystal optical axis direction; Be the uniform gain medium on one side, can add in its laserresonator as described any of claim 4 to 6 and play polarisation element.
8. as described a kind of microchip of claim 1 to 7 and frequency laser, it is characterized in that: each optical element that described gain media and frequency crystal, a polarisation are learned element can bond together by optical cement, in-depth optical cement, gummed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100986104A CN101364704B (en) | 2008-05-30 | 2008-05-30 | Micro chip type sum frequency laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100986104A CN101364704B (en) | 2008-05-30 | 2008-05-30 | Micro chip type sum frequency laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101364704A CN101364704A (en) | 2009-02-11 |
| CN101364704B true CN101364704B (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100986104A Expired - Fee Related CN101364704B (en) | 2008-05-30 | 2008-05-30 | Micro chip type sum frequency laser |
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| CN (1) | CN101364704B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199430A (en) * | 2013-03-20 | 2013-07-10 | 厦门大学 | Frequency doubling self-regulating Q green laser inside double-doped chrome yttrium aluminum garnet composite photassium titanyl phosphate cavity |
| CN111458951B (en) * | 2020-04-14 | 2022-03-01 | 中国地质大学（北京） | Compound crystal device of deep ultraviolet laser output technology |
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- 2008-05-30 CN CN2008100986104A patent/CN101364704B/en not_active Expired - Fee Related
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| CN101364704A (en) | 2009-02-11 |
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Granted publication date: 20101013 Termination date: 20170530 |