CN102856785A - End face and side face composite pumping device and laser - Google Patents
End face and side face composite pumping device and laser Download PDFInfo
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- CN102856785A CN102856785A CN2012103273266A CN201210327326A CN102856785A CN 102856785 A CN102856785 A CN 102856785A CN 2012103273266 A CN2012103273266 A CN 2012103273266A CN 201210327326 A CN201210327326 A CN 201210327326A CN 102856785 A CN102856785 A CN 102856785A
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Abstract
The invention discloses an end face and side face composite pumping device and a laser. The device comprises two fiber coupled laser diode (LD) modules, two conduction fibers, two optical focusing systems, an LD side face pumping module and a laser crystal. Lasers emitted by the two fiber coupled LD modules respectively pass through the conduction fibers and the optical focusing systems to respectively irradiate on two end faces of the laser crystal, and lasers emitted by the LD side face pumping module pump a side face of the laser crystal. The end face and side face composite pumping device can fully utilize characteristics of high light conversion rate and good light beam quality of the end face pumping technology, and can utilize advantages of large mode size and easiness in realization of high-power laser output of the side face pumping technology, so that an LD pumping solid laser can realize high-power laser output with high efficiency and light beam quality after the composite pumping technology is adopted.
Description
Technical field
The present invention relates to optical technical field, particularly relate to device and the laser of a kind of end face and side recombination pump.
Background technology
In the general diode pumping solid laser system, laser diode (LD, Laser Diode) mainly contains two kinds to the pump mode of laser crystal: end pumping structure and profile pump structure.
In LD end pumping structure, the laser beam of LD radiation through after the optical system shapings such as optical lens, light cone prism or conduction optical fiber, is radiated at the logical light end face of laser crystal usually, produces the gain regions coaxial with laser resonant cavity in its end face area.Figure 1A ~ Fig. 1 C has described in the end pumping structure laser emission of diode to be transported to several primary structures of laser crystal, and it just can finish this Energy transfer by an optical imaging system, the non-imaging and focusing of conduction optical fiber or system respectively.
In LD profile pump structure, the laser of LD radiation is usually perpendicular to the resonant cavity axle of laser, and direct irradiation or by shining the side surface in laser crystal after the light-guide device transmission produces large-area gain regions in laser crystal.Fig. 2 A, Fig. 2 B have described two kinds of typical profile pump structures.
But LD end pumping and the profile pump notable difference on project organization is so that two kinds of pumping configurations have different separately technical characterstics and application.
In the LD end pumping structure, the LD radiation laser beam is from the laser crystal surface feeding sputtering, greatly reduce the coupling loss of pump beam, simultaneously, because this kind pumping configuration is limited at the gain regions that crystal end-face produces, so that laser crystal can have the very high gain of light in less pumping zone, this efficient energy for laser is extracted and high light beam quality output provides good condition; But the gain regions of less also brings the shortcomings such as the end face distortion is serious, power output is limited.Thereby LD end pumping structure often is applicable to the laser of middle low power.
In the LD profile pump structure, the LD radiation laser beam is perpendicular to the optical axis incident of laser crystal, namely vertical with the laser resonant cavity axis, the advantage of this pump mode is can produce large in crystal and uniform gain is regional, for producing, high-power laser provides the foundation, often be applied in the superpower laser, but shortcoming to be the beam quality of Output of laser poor and energy extraction efficiency is low.
Shortcoming and defect for present solid state laser pumping configuration exists has proposed a kind of novel diode pumping pump apparatus, and the application of this device can make solid state laser when producing high power laser light, satisfies the requirement of high light beam quality.
Summary of the invention
The technical problem to be solved in the present invention provides device and the laser of a kind of end face and side recombination pump, and solid state laser can not satisfy the problem that high light beam quality requires in the prior art when producing high power laser light in order to solve.
For solving the problems of the technologies described above, on the one hand, the invention provides the device of a kind of end face and side recombination pump, comprising: two fibre coupled laser diode LD modules, two conduction optical fiber, two optical focusing systems, a LD side pumping module and a laser crystal; Wherein, the laser of a described fiber-coupled LD module emission is radiated on the end face of described laser crystal after through a described conduction optical fiber and a described optical focusing system; Be radiated on another end face of described laser crystal behind laser another described conduction optical fiber of process of another described fiber-coupled LD module emission and another described optical focusing system; The laser of described LD side pumping module emission carries out pumping to described laser crystal side.
Further, described fiber-coupled LD inside modules comprises one or more groups LD bar bar, through converging the end into conduction optical fiber after the inner optical system shaping, in the other end output of conduction optical fiber; Optical focusing system is connected with the conduction fiber-optic output, and what make that conduction optical fiber exports disperses on the end face that LD laser converges at laser crystal.
Further, the crystal pole that described laser crystal core is doping with rare-earth ions, effective pumping Region Matching of its length and side pumping module is at the not doped crystal of described crystal pole two ends difference bonding with matrix.
Further, the LD side pumping module comprises structure stand and is installed in a plurality of horizontal array LD modules on the structure stand.
On the other hand, the present invention also provides a kind of laser that includes above-mentioned end face and side recombination pump device, wherein, adds resonant cavity in described end face and side recombination pump device.
Further, described resonant cavity comprises: two 45 ° of coupling mirrors, a laser total reflective mirror and a laser output mirror; Wherein, two 45 ° of coupling mirrors are separately positioned between optical focusing system and the laser crystal; Described laser total reflective mirror is arranged on 45 ° of coupling mirrors below, and is at 45 ° with these 45 ° of coupling mirrors; Described laser output mirror is arranged on another 45 ° of coupling mirror belows, and is at 45 ° with another 45 ° of coupling mirrors.
Further, described 45 ° of coupling mirrors are thoroughly high to the diode wave band of laser.
Further, described 45 ° of coupling mirrors are high anti-to Output of laser.
Further, described laser total reflective mirror is all-trans to Output of laser.
Further, described laser output mirror is to the transmission of Output of laser wave band part.
Beneficial effect of the present invention is as follows:
Apparatus of the present invention can both take full advantage of the characteristics of end pumping technology light conversion efficiency height, good beam quality, while can be utilized again the large mode volume of profile pump technology, be easy to realize the advantage of high power laser light output, thereby so that after adopting this recombination pump technology, the LD light-pumped solid state laser can high efficiency, the realization high power laser light output of high light beam quality.
Description of drawings
Figure 1A is the structural representation that LD passes through optical imaging system pumping laser crystal in the prior art;
Figure 1B is the structural representation that LD passes through conduction optical fiber pumping laser crystal in the prior art;
Fig. 1 C be in the prior art LD by the structural representation of non-imaging and focusing system pumping laser crystal;
Fig. 2 A is the structural representation that shines after the LD radiation laser transmits by light-guide device in the prior art in crystal on side face;
Fig. 2 B be in the prior art LD radiation laser direct irradiation in the structural representation of crystal on side face;
Fig. 3 is the structural representation of the device of a kind of end face and side recombination pump in the embodiment of the invention;
Fig. 4 is a kind of structural representation that includes the laser of end face and side recombination pump device in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, does not limit the present invention.
The embodiment of the invention relates to the pump mode of the laser crystal that the solid state laser technology particularly must relate in the diode-pumped nd yag laser technology.The diode pumping solid laser technology is the present laser technology of main flow, and wherein one of important link is exactly, the pump technology mode of laser crystal, it to efficient, the high light beam quality of laser, high power, stablely export the conclusive effect that plays.Be different from conventional end pumping or the profile pump structure that adopts separately, based on the power output and the beam quality that improve diode pumping solid laser, the embodiment of the invention relates to the recombination pump constructional device that a kind of end face combines with profile pump, it combines the advantage of profile pump and end pumping structure, in laser crystal, not only produce uniform large volume gain profiles, for the Energy extraction of endovenous laser provides primary condition, produce simultaneously the gain regions of concentrating at the crystal two ends, make the more gain of preferably laser acquisition of beam characteristics, thereby the active that realizes zlasing mode in the chamber is preferred, the utilization of this device not only can solve the poor shortcoming of beam quality under the LD profile pump structure, simultaneously, also solve the limited shortcoming of power stage power ascension under the LD end pumping structure, finally realized the high light beam quality of laser, high-power output.
As shown in Figure 3, the embodiment of the invention relates to the device of a kind of end face and side recombination pump, and this device comprises: two fibre coupled laser diode LD modules 1, two conduction optical fiber 2, two optical focusing systems 3, a LD side pumping module 4 and a laser crystal 5; Wherein, the laser of fiber-coupled LD module 1 emission is radiated on the end face of laser crystal 5 after conducting optical fiber 2 and an optical focusing system 3 through one; The laser of another fiber-coupled LD module 1 emission is radiated on another end face of laser crystal 5 after conducting optical fiber 2 and another optical focusing system 3 through another; The laser of LD side pumping module 4 emissions carries out pumping to laser crystal 5 sides.
Fiber-coupled LD module 1 inside comprises one or more groups LD bar bar, through converging the end into conduction optical fiber 2 after the inner optical system shaping, then exports at the other end of conduction optical fiber 2; Optical focusing system 3 is connected with conduction optical fiber 2 outputs, and what make that conduction optical fiber 2 exports disperses on the end face that LD laser converges at laser crystal 5.
Laser crystal 5 is comprised of three parts, and core is the crystal pole of doping with rare-earth ions, and effective pumping Region Matching of its length and side pumping module is at the not doped crystal of its two ends difference bonding with matrix.
LD side pumping module 4 can carry out pumping to laser crystal 5 sides from a plurality of dimensions mainly by structure stand and be installed in a plurality of horizontal array LD modules on the structure stand, and the uniform gain of large volume distributes in crystal.
Include the laser structure of above-mentioned laser diode (LD) end face and side recombination pump device as shown in Figure 4, on device basic shown in Figure 3, by adding by two 45 ° of coupling mirrors 6, a laser total reflective mirror 7 and the resonant cavity that laser output mirror 8 forms, just consisted of a basic laser.Wherein, two 45 ° of coupling mirrors 6 are separately positioned between optical focusing system 3 and the laser crystal 5, and a laser total reflective mirror 7 is arranged on one 45 ° coupling mirror 6 belows, and is at 45 ° with these 45 ° of coupling mirrors 6; A laser output mirror 8 is arranged on another 45 ° of coupling mirror 6 belows, and is at 45 ° with another 45 ° of coupling mirrors 6.
6 pairs of diode wave band of laser of 45 ° of coupling mirrors high thoroughly (transmissivity 〉=99%) wherein are to Output of laser high anti-(reflectivity 〉=99%); 7 pairs of Output of lasers of laser total reflective mirror are all-trans, 8 pairs of Output of laser wave bands of laser output mirror part transmission (the Output of laser transmissivity is more than or equal to 50% and less than or equal to 98%).
Laser is lower in working order, and the doped portion in the middle of the LD side pumping module 4 pumping laser crystal 5s in the recombination pump device produces the gain regions of large volume at crystals, for the output of high power laser light provides the basis; And fiber-coupled LD module 1 is radiated on the logical light end face of laser crystal 5 after conducting optical fiber 2 and optical focusing system 3, small volume high gain zone in laser crystal 5 interior generations, make low-mode laser preferential acquisition amplification in the oscillatory process in resonant cavity, suppress again simultaneously the generation of higher order mode laser, finally realized the Laser output of high-power and high-lighting beam quality.
As can be seen from the above-described embodiment, apparatus of the present invention can both take full advantage of the characteristics of end pumping technology light conversion efficiency height, good beam quality, while can be utilized again the large mode volume of profile pump technology, be easy to realize the advantage of high power laser light output, thereby so that after adopting this recombination pump technology, the LD light-pumped solid state laser can high efficiency, the realization high power laser light output of high light beam quality.
Although be the example purpose, the preferred embodiments of the present invention are disclosed, it also is possible those skilled in the art will recognize various improvement, increase and replacement, therefore, scope of the present invention should be not limited to above-described embodiment.
Claims (10)
1. the device of an end face and side recombination pump is characterized in that, comprising: two fibre coupled laser diode LD modules, two conduction optical fiber, two optical focusing systems, a LD side pumping module and a laser crystal; Wherein, the laser of a described fiber-coupled LD module emission is radiated on the end face of described laser crystal after through a described conduction optical fiber and a described optical focusing system; Be radiated on another end face of described laser crystal behind laser another described conduction optical fiber of process of another described fiber-coupled LD module emission and another described optical focusing system; The laser of described LD side pumping module emission carries out pumping to described laser crystal side.
2. the device of end face as claimed in claim 1 and side recombination pump, it is characterized in that, described fiber-coupled LD inside modules comprises one or more groups LD bar bar, through converging the end into conduction optical fiber after the inner optical system shaping, in the other end output of conduction optical fiber; Optical focusing system is connected with the conduction fiber-optic output, and what make that conduction optical fiber exports disperses on the end face that LD laser converges at laser crystal.
3. the device of end face as claimed in claim 1 or 2 and side recombination pump, it is characterized in that, the crystal pole that described laser crystal core is doping with rare-earth ions, effective pumping Region Matching of its length and side pumping module is at the not doped crystal of described crystal pole two ends difference bonding with matrix.
4. the device of end face as claimed in claim 3 and side recombination pump is characterized in that, the LD side pumping module comprises structure stand and is installed in a plurality of horizontal array LD modules on the structure stand.
5. a laser that includes each described end face of claim 1 ~ 4 and side recombination pump device is characterized in that, adds resonant cavity in described end face and side recombination pump device.
6. laser as claimed in claim 5 is characterized in that, described resonant cavity comprises: two 45 ° of coupling mirrors, a laser total reflective mirror and a laser output mirror; Wherein, two 45 ° of coupling mirrors are separately positioned between optical focusing system and the laser crystal; Described laser total reflective mirror is arranged on 45 ° of coupling mirrors below, and is at 45 ° with these 45 ° of coupling mirrors; Described laser output mirror is arranged on another 45 ° of coupling mirror belows, and is at 45 ° with another 45 ° of coupling mirrors.
7. laser as claimed in claim 6 is characterized in that, described 45 ° of coupling mirrors are thoroughly high to the diode wave band of laser.
8. laser as claimed in claim 7 is characterized in that, described 45 ° of coupling mirrors are high anti-to Output of laser.
9. laser as claimed in claim 8 is characterized in that, described laser total reflective mirror is all-trans to Output of laser.
10. laser as claimed in claim 9 is characterized in that, described laser output mirror is to the transmission of Output of laser wave band part.
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| CN2012103273266A CN102856785A (en) | 2012-09-06 | 2012-09-06 | End face and side face composite pumping device and laser |
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| CN2012103273266A CN102856785A (en) | 2012-09-06 | 2012-09-06 | End face and side face composite pumping device and laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684692A (en) * | 2016-05-13 | 2017-05-17 | 道中道激光科技有限公司 | Pulse width adjustable laser |
| CN109845142A (en) * | 2016-09-06 | 2019-06-04 | 萨伯康姆有限责任公司 | Space division multiplexing optical communication system and its amplifier |
| CN113889833A (en) * | 2021-08-17 | 2022-01-04 | 中国科学院理化技术研究所 | Hybrid pump laser |
| CN115064929A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber pump light coupling system and method thereof |
Citations (5)
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|---|---|---|---|---|
| US4794615A (en) * | 1987-06-12 | 1988-12-27 | Spectra Diode Laboratories, Inc. | End and side pumped laser |
| CN1547295A (en) * | 2003-12-05 | 2004-11-17 | 清华大学 | Dual wavelength combination pumping method for batten-shaped laser gain medium and its gain module |
| CN101202412A (en) * | 2007-11-30 | 2008-06-18 | 深圳大学 | Solid laser |
| CN101465513A (en) * | 2009-01-09 | 2009-06-24 | 哈尔滨工程大学 | Bistable Tm,Ho:YLE laser with bistable zone and adjustable width - |
| CN202856144U (en) * | 2012-09-06 | 2013-04-03 | 中国电子科技集团公司第十一研究所 | Device for end-side composite pumping and laser |
-
2012
- 2012-09-06 CN CN2012103273266A patent/CN102856785A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794615A (en) * | 1987-06-12 | 1988-12-27 | Spectra Diode Laboratories, Inc. | End and side pumped laser |
| CN1547295A (en) * | 2003-12-05 | 2004-11-17 | 清华大学 | Dual wavelength combination pumping method for batten-shaped laser gain medium and its gain module |
| CN101202412A (en) * | 2007-11-30 | 2008-06-18 | 深圳大学 | Solid laser |
| CN101465513A (en) * | 2009-01-09 | 2009-06-24 | 哈尔滨工程大学 | Bistable Tm,Ho:YLE laser with bistable zone and adjustable width - |
| CN202856144U (en) * | 2012-09-06 | 2013-04-03 | 中国电子科技集团公司第十一研究所 | Device for end-side composite pumping and laser |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684692A (en) * | 2016-05-13 | 2017-05-17 | 道中道激光科技有限公司 | Pulse width adjustable laser |
| CN109845142A (en) * | 2016-09-06 | 2019-06-04 | 萨伯康姆有限责任公司 | Space division multiplexing optical communication system and its amplifier |
| CN109845142B (en) * | 2016-09-06 | 2022-07-15 | 萨伯康姆有限责任公司 | Space division multiplexing optical communication system and amplifier therefor |
| CN113889833A (en) * | 2021-08-17 | 2022-01-04 | 中国科学院理化技术研究所 | Hybrid pump laser |
| CN115064929A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber pump light coupling system and method thereof |
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