CN201478678U - Tension type folding-cavity laser - Google Patents
Tension type folding-cavity laser Download PDFInfo
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- CN201478678U CN201478678U CN2009201947709U CN200920194770U CN201478678U CN 201478678 U CN201478678 U CN 201478678U CN 2009201947709 U CN2009201947709 U CN 2009201947709U CN 200920194770 U CN200920194770 U CN 200920194770U CN 201478678 U CN201478678 U CN 201478678U
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Abstract
The utility model relates to the field of lasers, in particular to a tension-type folding-cavity (TFR) laser structure. The tension-type folding-cavity laser comprises a pump source of an array semi-conductor laser; pump light is coupled by an optical collimating lens, and then enters a laser gain medium sheet; the laser gain medium sheet is provided with film layer series at both the top side and the bottom side, and is also provided with a reflection cavity mirror and an output cavity mirror on the periphery; resonant light path is folded back and forth in the laser medium sheet; the resonant light path, the reflection cavity mirror and the output cavity mirror on the periphery form a folding resonant cavity structure, wherein the upper side of the laser gain medium sheet is glued with an optical sheet with same matrix as the laser gain medium; the film layer series at the upper side is plated with at the outer surface of the optical sheet; and the lower side of the laser gain medium sheet is plated with the film layer series at the bottom side and is glued with a heat dissipation element. The tension-type folding-cavity (TFR) laser has simple and reasonable structure, improves heat dissipation of the laser gain medium sheet.
Description
Technical field
The utility model relates to field of lasers, relates in particular to a kind of shrunk type refrative cavity (TFR) laser structure.
Background technology
The laser of shrunk type refrative cavity (TFR) structure has improved the operation conditions of high power laser diode light-pumped solid state laser largely.The light path of TEMoo mould in gain media in this TFR structure, its activation volume and pump beam reach optimum Match.The TFR structural design makes the operation of TEMoo mould reach very high efficiency, very high-gain also is provided, allow laser moving above under the threshold power, and obtain very short Q-switched pulse, shrunk type refrative cavity (TFR) also can constitute image intensifer simultaneously provides high-gain to amplify.
Referring to U.S. Patent number is 4,894, in 839 the technical scheme, Nd:YAG is generally adopted in common TFR chamber, laser materials such as Nd:YLF crystal, its TFR structure as shown in Figure 1, array LD is by optical fiber lens coupling wire pumping laser gain media thin slice, and it is anti-reflection that gain medium thin slice bottom is coated with pump light, the high anti-Double-color film of oscillation light, the top is coated with identical Double-color film equally, and places laser mirror in both sides, gain medium thin slice top.High reflective mirror M1 and output coupling mirror M2 make laser beam come back reflective between the upper and lower surfaces of gain medium, and the pip below it is just dropping on the center of LD emitter region.Oscillation light is the Z font in the chamber propagates, and realizes laser output.This pumping provides best overlapping for for how much excitation area and mode volume.But in the pumping zone of this structure, gain medium heat radiation flux is limited, and during high power pumping, thermal effect will be more serious, thereby not obtain extensive use.
The utility model content
Therefore,, the utility model proposes a kind of shrunk type refrative cavity (TFR) laser structure that improves gain medium sheet heat dissipation problem that has, use more widely in the hope of obtaining for overcoming the deficiency of prior art scheme.
The technical solution of the utility model is:
Shrunk type refrative cavity laser of the present utility model, the pumping source that comprises the array semi-conductor laser, enter the gain medium sheet through fiber optic collimator mirror coupling pump light, laser medium sheet both sides up and down is distributed with rete system, its periphery also is provided with reflecting cavity mirror and output cavity mirror, the harmonic light light path is folding back and forth in the laser medium sheet, constitutes the fold resonator structure with the reflecting cavity mirror and the output cavity mirror of periphery.Wherein, the upside gummed of described gain medium sheet has and the optical sheet of gain medium with matrix, the rete system on described upper strata is plated on this optical sheet outer surface, the rete system of the downside plating lower floor of described gain medium sheet, and gummed has heat dissipation element.
Further, can also be provided with adjusting Q crystal, the polarizer, frequency-doubling crystal or other optical elements in the described resonant cavity.
Further, the pumping source of described array semi-conductor laser can be the pumping source of wall scroll high power semiconductor lasers, and the combination coupling pump light of process optical lens and fiber optic collimator mirror enters the gain medium sheet.Perhaps, the pumping source of described array semi-conductor laser can be other pump lights of optical fiber output, and the combination coupling pump light of process optical lens and fiber optic collimator mirror enters the gain medium sheet.
Structure one: described optical sheet is rectangular structure (201B1), its outer surface (S2) is gone up plating pump light antireflective coating and harmonic light high-reflecting film layer, the downside of gain medium sheet (201A1) and heat dissipation element (202) cemented surface (S1) plating pump light and harmonic light high-reflecting film layer, remaining downside (S4) plating pump light and harmonic light antireflective coating, described reflecting cavity mirror (205A) and output cavity mirror (205B) are arranged at the left and right sides, below of gain medium sheet (201A1) respectively.
Structure two: described optical sheet is class rectangular structure (201B2), the vertical plane on its right side corner angle of pruning up and down, form Brewster inclined-plane window, its outer surface (S2) is gone up plating pump light antireflective coating and harmonic light high-reflecting film layer, vertical plane (S3) the plating pump light and the harmonic light high-reflecting film layer in its left side, the downside of gain medium sheet (201A2) and heat dissipation element (202) cemented surface (S6) plating pump light and harmonic light high-reflecting film layer, window inclined-plane, the Brewster inclined-plane (S5 of optical sheet, S6) coatings not, described reflecting cavity mirror (205A) and output cavity mirror (205B) are arranged at the right-hand both sides up and down of optical sheet (201B2) respectively.
It is to constitute the passive Q-regulaitng laser amplifier that the another kind of the utility model structure is used: semiconductor laser (311), optical coupling system (312) and the passive Q-adjusted micro-slice laser (313) that the reflecting cavity mirror in the described fold resonator and output cavity mirror or other optical elements can be replaced by the unidirectional input of light path.
The technical solution of the utility model adopts ultra-thin gain medium, and directly touches mutually with the high thermal conductivity coefficient material, can weaken the influence of thermal effect to laser output effectively, thereby can realize more effective high power pump, can obtain high-quality TEM simultaneously
00Laser output.Therefore the utility model is a kind of simple and reasonable, has improved shrunk type refrative cavity (TFR) laser structure of gain medium sheet heat dissipation problem.
Description of drawings
Fig. 1 is existing TFR laser structure schematic diagram;
Fig. 2 (a) is the structural representation of embodiment 1 of the present utility model;
Fig. 2 (b) is the structural representation of embodiment 2 of the present utility model;
Fig. 2 (c) is the structural representation of embodiment 3 of the present utility model;
Fig. 3 is that structure of the present utility model constitutes passive Q-regulaitng laser amplifier schematic diagram.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Embodiment 1:
Consult shown in Fig. 2 (a), wherein, 201A1 is high-dopant concentration gain medium thin slice or superthin section, 201B1 is with gain medium thin slice 201A1 same matrix but the optical crystal sheet of the active ions material that do not mix, described optical sheet 201B1 is a rectangular structure, 202 is the heat dissipation element that logical flowing liquid, gas etc. constitute in high thermal conductivity coefficient solid material or the hot channel, 203 is the array semi-conductor laser, 204 is the fiber optic collimator rod, 205A, 205B are the laser cavity sheet, and 206,207 is optical elements such as adjusting Q crystal, the polarizer or frequency-doubling crystal.Gain medium thin slice 201A1 and optical crystal sheet 201B1 become one by in-depth optical cement mode.The downside of gain medium sheet 201A1 and heat dissipation element 202 cemented surface S1 plating are to fundamental wave and the high anti-film of pump light, it only covers pump light pumping zone in the line focus vertical direction, the outer surface S2 of optical sheet 201B1 go up plating anti-reflection to pump light, to the high anti-rete of fundamental wave.The ultra-thin gain medium sheet of array semi-conductor laser (LD) 203 wire high power pump 201A1.The setting of chamber mirror 205A, chamber mirror 205B makes laser beam come back reflective between the upper and lower surfaces of gain media, its pip is just dropping on the center of array semi-conductor laser 203 emitter regions, the oscillation light that produces is propagated in light path with the Z font, the heat that gain medium sheet 201A1 produces is taken away rapidly by the heat dissipation element 202 of the high thermal conducting material that is in contact with it, thereby realizes high power pump.In the present embodiment structure, chamber mirror 205A, 205B and optical element 206,207 are arranged on the lower end of gain medium thin slice 201A1, and resonant cavity is " ∧ " type structure.The pump light incident end face of gain medium thin slice 201A1 only covers laser cavity rete S1 in the subregion, remaining edge S4 zone is then anti-reflection to pump light and oscillation light.Array LD203 is by fiber optic collimator rod 204 coupling back pumping laser gain media thin slice 201A1, and the oscillation light of generation is the Z font in the chamber propagates, and realizes laser output.Utilize heat dissipation element 202 efficiently the heat that gain medium thin slice 201A1 produces can be led away fast, obtains stable high power laser light and export.
Embodiment 2:
Consult shown in Fig. 2 (b), its similar is in the embodiment 1 shown in Fig. 2 (a), different is that described optical sheet 201B2 is the class rectangular structure, the vertical plane on its right side corner angle of pruning up and down, form Brewster inclined-plane window, its outer surface S2 goes up plating pump light antireflective coating and harmonic light high-reflecting film layer, the vertical plane S3 plating pump light and the harmonic light high-reflecting film layer in its left side, the downside of gain medium sheet 201A1 and heat dissipation element 202 cemented surface S6 plating pump light and harmonic light high-reflecting film layer, window inclined-plane, the Brewster inclined-plane S5 of optical sheet, S6 is coatings not, and described reflecting cavity mirror 205A and output cavity mirror 205B are arranged at the right-hand both sides up and down of optical sheet 201B1 respectively.Optical element 206,207 is arranged on the right-hand member of gain medium thin slice 201A2 in the structure of present embodiment, and resonant cavity is "＜" type structure.Optical sheet 201B2 directly utilizes total internal reflection to propagate, and this moment, gain medium thin slice 201A2 and heat dissipation element 202 had bigger contact area, can reach better radiating effect.
Embodiment 3:
Consult shown in Fig. 2 (c), its similar is in the embodiment 2 shown in Fig. 2 (b), different is to adopt optical fiber output LASER Light Source 203A, also can adopt wall scroll high power LD light source, and adopt combination to transfer pump light to wire through optical lens 204A and fiber optic collimator mirror 204B, coupling pumping gain medium sheet 201A2.
Consult shown in Figure 3ly, adopt the foldable structure of the embodiment shown in Fig. 2 of the present utility model (a) can constitute the passive Q-regulaitng laser amplifier.Wherein 311 is semiconductor laser, and 312 is optical coupling system, and 313 is passive Q-adjusted micro-slice laser, forms by in-depth optical cement mode as adopting Nd:YAG crystal, Cr:YAG crystal and ktp crystal thin slice.Enter into gain medium 201A1 from the pulse light of passive Q-adjusted micro-slice laser 313 outputs, gain medium 201A1 is under the pump light effect simultaneously, particle is in excitation state, under the flashlight effect, produce strong stimulated radiation, and make it in the flashlight that is added to amplify, thereby obtain higher-wattage output.
Ultra-thin gain medium of the present utility model can weaken the influence of thermal effect to laser output effectively, thereby can realize more effective high power pump owing to directly touch mutually with the high thermal conductivity coefficient material, can obtain high-quality TEM simultaneously
00Laser output.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (9)
1. shrunk type refrative cavity laser, the pumping source that comprises the array semi-conductor laser, enter the gain medium sheet through fiber optic collimator mirror coupling pump light, laser medium sheet both sides up and down is distributed with rete system, its periphery also is provided with reflecting cavity mirror and output cavity mirror, the harmonic light light path is folding back and forth in the laser medium sheet, reflecting cavity mirror and output cavity mirror with the periphery constitute the fold resonator structure, it is characterized in that: the upside gummed of described gain medium sheet has and the optical sheet of gain medium with matrix, the rete system on described upper strata is plated on this optical sheet outer surface, the rete system of the downside plating lower floor of described gain medium sheet, and gummed has heat dissipation element.
2. shrunk type refrative cavity laser according to claim 1 is characterized in that: can also be provided with adjusting Q crystal, the polarizer, frequency-doubling crystal or other optical elements in the described resonant cavity.
3. shrunk type refrative cavity laser according to claim 1, it is characterized in that: the pumping source of described array semi-conductor laser can be the pumping source of wall scroll high power semiconductor lasers, and the combination coupling pump light of process optical lens and fiber optic collimator mirror enters the gain medium sheet.
4. shrunk type refrative cavity laser according to claim 1, it is characterized in that: the pumping source of described array semi-conductor laser can be other pump lights of optical fiber output, and the combination coupling pump light of process optical lens and fiber optic collimator mirror enters the gain medium sheet.
5. according to claim 1 or 2 or 3 or 4 described shrunk type refrative cavity lasers, it is characterized in that: described optical sheet is rectangular structure (201B1), its outer surface (S2) is gone up plating pump light antireflective coating and harmonic light high-reflecting film layer, the downside of gain medium sheet (201A1) and heat dissipation element (202) cemented surface (S1) plating pump light and harmonic light high-reflecting film layer, remaining downside (S4) plating pump light and harmonic light antireflective coating, described reflecting cavity mirror (205A) and output cavity mirror (205B) are arranged at the left and right sides, below of gain medium sheet (201A1) respectively.
6. according to claim 1 or 2 or 3 or 4 described shrunk type refrative cavity lasers, it is characterized in that: described optical sheet is class rectangular structure (201B2), the vertical plane on its right side corner angle of pruning up and down, form Brewster inclined-plane window, its outer surface (S2) is gone up plating pump light antireflective coating and harmonic light high-reflecting film layer, vertical plane (S3) the plating pump light and the harmonic light high-reflecting film layer in its left side, the downside of gain medium sheet (201A2) and heat dissipation element (202) cemented surface (S6) plating pump light and harmonic light high-reflecting film layer, window inclined-plane, the Brewster inclined-plane (S5 of optical sheet, S6) coatings not, described reflecting cavity mirror (205A) and output cavity mirror (205B) are arranged at the right-hand both sides up and down of optical sheet (201B2) respectively.
7. shrunk type refrative cavity laser according to claim 1 and 2 is characterized in that: reflecting cavity mirror in the described fold resonator and output cavity mirror or other optical elements can be replaced by semiconductor laser (311), optical coupling system (312) and the passive Q-adjusted micro-slice laser (313) of the unidirectional input of light path.
8. shrunk type refrative cavity laser according to claim 5 is characterized in that: reflecting cavity mirror in the described fold resonator and output cavity mirror or other optical elements can be replaced by semiconductor laser (311), optical coupling system (312) and the passive Q-adjusted micro-slice laser (313) of the unidirectional input of light path.
9. shrunk type refrative cavity laser according to claim 6 is characterized in that: reflecting cavity mirror in the described fold resonator and output cavity mirror or other optical elements can be replaced by semiconductor laser (311), optical coupling system (312) and the passive Q-adjusted micro-slice laser (313) of the unidirectional input of light path.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201947709U CN201478678U (en) | 2009-09-10 | 2009-09-10 | Tension type folding-cavity laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201947709U CN201478678U (en) | 2009-09-10 | 2009-09-10 | Tension type folding-cavity laser |
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| CN201478678U true CN201478678U (en) | 2010-05-19 |
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| CN2009201947709U Expired - Fee Related CN201478678U (en) | 2009-09-10 | 2009-09-10 | Tension type folding-cavity laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917053A (en) * | 2015-06-25 | 2015-09-16 | 中国电子科技集团公司第四十九研究所 | V-type resonant cavity and laser based on V-type resonant cavity |
| CN108020886A (en) * | 2016-11-04 | 2018-05-11 | 福州高意通讯有限公司 | A kind of MEMS fibre optic attenuators |
| CN109950778A (en) * | 2019-03-29 | 2019-06-28 | 中国空间技术研究院 | A kind of end pumping injection locking pure-tone pulse slab laser device |
| CN114824998A (en) * | 2022-06-30 | 2022-07-29 | 中国工程物理研究院应用电子学研究所 | High-overlapping-efficiency distributed reflection type direct liquid-cooling laser gain device |
-
2009
- 2009-09-10 CN CN2009201947709U patent/CN201478678U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917053A (en) * | 2015-06-25 | 2015-09-16 | 中国电子科技集团公司第四十九研究所 | V-type resonant cavity and laser based on V-type resonant cavity |
| CN108020886A (en) * | 2016-11-04 | 2018-05-11 | 福州高意通讯有限公司 | A kind of MEMS fibre optic attenuators |
| CN109950778A (en) * | 2019-03-29 | 2019-06-28 | 中国空间技术研究院 | A kind of end pumping injection locking pure-tone pulse slab laser device |
| CN114824998A (en) * | 2022-06-30 | 2022-07-29 | 中国工程物理研究院应用电子学研究所 | High-overlapping-efficiency distributed reflection type direct liquid-cooling laser gain device |
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| 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: 20100519 Termination date: 20120910 |