CN202384632U - Coherent beam-combination high power fiber laser based on short line cavity - Google Patents
Coherent beam-combination high power fiber laser based on short line cavity Download PDFInfo
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- CN202384632U CN202384632U CN2011205441657U CN201120544165U CN202384632U CN 202384632 U CN202384632 U CN 202384632U CN 2011205441657 U CN2011205441657 U CN 2011205441657U CN 201120544165 U CN201120544165 U CN 201120544165U CN 202384632 U CN202384632 U CN 202384632U
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Abstract
The utility model discloses a coherent beam-combination high power fiber laser based on a short line cavity, which comprises a first pumping source, a first fiber bragg grating, a second fiber bragg grating, first erbium/ytterbium co-doped fiber, an all-fiber isolator, a second pumping source, a third pumping source, a fourth pumping source, a first wavelength division multiplexer, a second wavelength division multiplexer, a third wavelength division multiplexer, second erbium/ytterbium co-doped fiber, third erbium/ytterbium co-doped fiber, fourth erbium/ytterbium co-doped fiber, a first coupler, a second coupler, a third coupler, a first filter, a second filter, a third filter, a first polarization controller, a second polarization controller, a third polarization controller, a first phase modulator, a second phase modulator, a third phase modulator, first single mode fiber, second single mode fiber, third single mode fiber and a beam combination device which are connected to form at least three stages of amplification structures. The coherent beam-combination high power fiber laser is suitable for the fields of laser weapons, space optical communication, laser processing, remote sensing, laser radars, and the like, which require high laser output power and good light beam quality.
Description
Technical field
The utility model relates to field of lasers, relates in particular to a kind of coherent beam combination high-capacity optical fiber laser based on the short-term chamber.
Background technology
It is swift and violent with its compact conformation, superiority development that energy conversion efficiency is high that the generation of superpower laser and development have promoted commercial production and national defense construction, especially solid state laser greatly, and wherein fiber laser becomes the up-and-coming youngster.Owing on the optical fiber laser structure, make its beam quality will be higher than other laser far away, but high-power aspect is slightly inadequate.Along with development of technology, fiber laser constantly has new method to propose in high-power development process.
At first, attracted people's extensive concern with characteristics such as its good beam quality, conversion efficiency height and compact conformations based on the fiber laser of covering pumping technology.The single fiber power output of fiber laser in 2004 reaches a kilowatt magnitude, and IPG company reports in 2009 have been realized the single-mode laser output of single fiber myriawatt.But along with the increase of power, various nonlinear effects such as SBS, SRS and FWM make beam quality seriously reduce, and become the huge obstacle of further increase laser power.The proposition of big mode field area fibers becomes a kind of feasible method, increases fiber radius and can effectively increase the luminous power that optical fiber can carry under the constant situation of optical power density keeping, for the preparation of high power fiber laser provides necessary precondition.But because the fiber radius increasing degree is limited, excessive fiber radius makes the complicacy that the mould field becomes, beam quality can not get guaranteeing, so this method problem that can solve receives the restriction of fiber size.MOPA can effectively increase laser power, and exports being of high quality of laser, but receives the restriction of simple optical fiber luminous power bearing capacity equally.
At present, the beam combination of multi-channel optical fibre laser becomes a kind of more efficiently method that realizes high power laser output.In order when increasing power output, farthest to guarantee to export the beam quality of laser, can make each road export identical, the Phase synchronization of polarization state of laser with phase place through the polarization state of adjusting each road laser, beam combination efficient and laser stability are all very high.
But output spectrum broad in the present existing laser coherence scheme, complex structure, poor stability.
The utility model content
The technical problem that the utility model solves is to provide a kind of coherent beam combination high-capacity optical fiber laser based on short linear cavity, advantages such as that this laser has is simple in structure, stability height, high power, narrow linewidth output.
In order to overcome the above problems; The utility model provides a kind of coherent beam combination high-capacity optical fiber laser based on the short-term chamber; Comprise: first pumping source 101, first fiber grating 102, second fiber grating 103, first erbium/ytterbium co-doped fiber 104, full fibre optic isolater 105, second pumping source 201, the 3rd pumping source 202, the 4th pumping source 203, first wavelength division multiplexer 204, second wavelength division multiplexer 205, the 3rd wavelength division multiplexer 206, second erbium/ytterbium co-doped fiber 207, the 3rd erbium/ytterbium co-doped fiber 208, the 4th erbium/ytterbium co-doped fiber 209, first coupler 210, second coupler 211, the 3rd coupler 212, first filter 213, second filter 214, the 3rd filter 215, first Polarization Controller 216, second Polarization Controller 217, the 3rd Polarization Controller 218, first phase-modulator 219, second phase-modulator 220, third phase position modulator 221, first monomode fiber 301, second monomode fiber 302, the 3rd monomode fiber 303 and beam combination device 304; An end of output termination first fiber grating 102 of first pumping source 101 wherein; One end of another termination first erbium/ytterbium co-doped fiber 104 of first fiber grating 102; One end of another termination second fiber grating 103 of first erbium/ytterbium co-doped fiber 104; The input of the full fibre optic isolater 105 of another termination of second fiber grating 103; 2042 ports of output termination first wavelength division multiplexer 204 of full fibre optic isolater 105; 2041 ports of first wavelength division multiplexer 204 connect the output of second pumping source 201; 2043 ports of first wavelength division multiplexer 204 connect an end of second erbium/ytterbium co-doped fiber 207; 2102 ports of another termination first coupler 210 of second erbium/ytterbium co-doped fiber 207; 2103 ports of first coupler 210 connect 2052 ports of second wavelength division multiplexer 205; 2104 ports of first coupler 210 connect an end of first filter 213; One end of another termination first Polarization Controller 216 of first filter 213; One end of another termination first phase-modulator 219 of first Polarization Controller 216, an end of another termination first monomode fiber 301 of first phase-modulator 219, the other end of first monomode fiber 301 is contained on the beam combination device 304; 2051 ports of second wavelength division multiplexer 205 connect the output of the 3rd pumping source 202; 2053 ports of second wavelength division multiplexer 205 connect an end of the 3rd erbium/ytterbium co-doped fiber 208; 2112 ports of another termination second coupler 211 of the 3rd erbium/ytterbium co-doped fiber 208; 2113 ports of second coupler 211 connect 2062 ports of the 3rd wavelength division multiplexer 206; 2114 ports of second coupler 211 connect an end of second filter 214, an end of another termination second Polarization Controller 217 of second filter 214, an end of another termination second phase-modulator 220 of second Polarization Controller 217; One end of another termination second monomode fiber 302 of second phase-modulator 220, the other end of second monomode fiber 302 is contained on the beam combination device 304; 2061 ports of the 3rd wavelength division multiplexer 206 connect the output of the 4th pumping source 203; 2063 ports of the 3rd wavelength division multiplexer 206 connect an end of the 4th erbium/ytterbium co-doped fiber 209; 2122 ports of another termination the 3rd coupler 212 of the 4th erbium/ytterbium co-doped fiber 209; 2124 ports of the 3rd coupler 212 connect an end of the 3rd filter 215; One end of another termination the 3rd Polarization Controller 218 of the 3rd filter 215, an end of another termination third phase position modulator 221 of the 3rd Polarization Controller 218, an end of another termination the 3rd monomode fiber 303 of third phase position modulator 221; The other end of the 3rd monomode fiber 303 is contained on the beam combination device 304; First monomode fiber 301, second monomode fiber 302, the 3rd monomode fiber 303 outputs carry out multi-form arrangement through beam combination device 304, connect at least three grades of structure for amplifying, and first pumping source 101, second pumping source 201, the 3rd pumping source 202 are identical long wavelength laser with the 4th pumping source 203.
By first, second fiber grating 102 and 103 and the short-term property resonant cavity formed of first erbium/ytterbium co-doped fiber 104 can produce the single-frequency laser signal, this laser signal width, laser output is stable; Follow-up amplifications at different levels all thus the output laser of short cavity laser as seed light; Make that the frequency of the laser that export on each road is in full accord; Then adjust the polarization state and the phase place of each road output laser respectively through Polarization Controller and phase-modulator; Make every road output laser have identical phase place and polarization state, the coherence is strong, can realize the high power of coherent beam combination, the laser output of high light beam quality effectively.
Description of drawings
When combining accompanying drawing to consider; Through with reference to following detailed, can more completely understand the utility model better and learn wherein many attendant advantages easily, accompanying drawing described herein is used to provide the further understanding to the utility model; Constitute the part of the utility model; Illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model, wherein:
Fig. 1 is based on the coherent beam combination high-capacity optical fiber laser sketch map of short linear cavity;
Fig. 2 fiber-optic output arrangement mode.
Among the figure: 101, first pumping source; 102, first fiber grating; 103, second fiber grating; 104, first erbium/ytterbium co-doped fiber; 105, full fibre optic isolater; 201, second pumping source; 202, the 3rd pumping source; 203, the 4th pumping source; 204, first wavelength division multiplexer; 205, second wavelength division multiplexer; 206, the 3rd wavelength division multiplexer; 207, second erbium/ytterbium co-doped fiber; 208, the 3rd erbium/ytterbium co-doped fiber; 209, the 4th erbium/ytterbium co-doped fiber; 210, first coupler; 211, second coupler; 212, the 3rd coupler; 213, first filter; 214, second filter; 215, the 3rd filter; 216, first Polarization Controller; 217, second Polarization Controller; 218, the 3rd Polarization Controller; 219, first phase controller; 220, second phase controller; 221, third phase level controller; 301, first monomode fiber; 302, second monomode fiber; 303, the 3rd monomode fiber; 304, beam combination device.
Embodiment
Followingly the embodiment of the utility model is described with reference to Fig. 1-2.
For make above-mentioned purpose, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the utility model done further detailed explanation.
As shown in Figure 1, the structure of the utility model comprises seed light source part, three grades of amplifier sections and beam combination part; Wherein seed light source part comprises first pumping source 101, first fiber grating 102, first erbium/ytterbium co-doped fiber 104, second fiber grating 103 and full fibre optic isolater 105 successively; Three grades of amplifier sections comprise second pumping source 201; The 3rd pumping source 202; The 4th pumping source 203; First wavelength division multiplexer 204; Second wavelength division multiplexer 205; The 3rd wavelength division multiplexer 206; Second erbium/ytterbium co-doped fiber 207; The 3rd erbium/ytterbium co-doped fiber 208; The 4th erbium/ytterbium co-doped fiber 209; First coupler 210; Second coupler 211; The 3rd coupler 212; First filter 213; Second filter 214; The 3rd filter 215; First Polarization Controller 216; Second Polarization Controller 217; The 3rd Polarization Controller 218; First phase controller 219; Second phase controller 220 and third phase level controller 221; Beam combination partly comprises first monomode fiber 301, second monomode fiber 302, the 3rd monomode fiber 303 and beam combination device 304; An end of output termination first fiber grating 102 of first pumping source 101 wherein; One end of another termination first erbium/ytterbium co-doped fiber 104 of first fiber grating 102; One end of another termination second fiber grating 103 of first erbium/ytterbium co-doped fiber 104; The input of the full fibre optic isolater 105 of another termination of second fiber grating 103; 2042 ports of output termination first wavelength division multiplexer 204 of full fibre optic isolater 105; 2041 ports of first wavelength division multiplexer 204 connect the output of second pumping source 201, and 2043 ports of first wavelength division multiplexer 204 connect an end of second erbium/ ytterbium co-doped fiber 207,2102 ports of another termination first coupler 210 of second erbium/ytterbium co-doped fiber 207; 2103 ports of first coupler 210 connect 2052 ports of second wavelength division multiplexer 205; 2104 ports of first coupler 210 connect an end of first filter 213, an end of another termination first Polarization Controller 216 of first filter 213, an end of another termination first phase-modulator 219 of first Polarization Controller 216; One end of another termination first monomode fiber 301 of first phase-modulator 219, the other end of first monomode fiber 301 is contained on the beam combination device 304; 2051 ports of second wavelength division multiplexer 205 connect the output of the 3rd pumping source 202; 2053 ports of second wavelength division multiplexer 205 connect an end of the 3rd erbium/ytterbium co-doped fiber 208; 2112 ports of another termination second coupler 211 of the 3rd erbium/ytterbium co-doped fiber 208; 2113 ports of second coupler 211 connect 2062 ports of the 3rd wavelength division multiplexer 206; 2114 ports of second coupler 211 connect an end of second filter 214, an end of another termination second Polarization Controller 217 of second filter 214, an end of another termination second phase-modulator 220 of second Polarization Controller 217; One end of another termination second monomode fiber 302 of second phase-modulator 220, the other end of second monomode fiber 302 is contained on the beam combination device 304; 2061 ports of the 3rd wavelength division multiplexer 206 connect the output of the 4th pumping source 203; 2063 ports of the 3rd wavelength division multiplexer 206 connect an end of the 4th erbium/ytterbium co-doped fiber 209; 2122 ports of another termination the 3rd coupler 212 of the 4th erbium/ytterbium co-doped fiber 209; 2124 ports of the 3rd coupler 212 connect an end of the 3rd filter 215; One end of another termination the 3rd Polarization Controller 218 of the 3rd filter 215, an end of another termination third phase position modulator 221 of the 3rd Polarization Controller 218, an end of another termination the 3rd monomode fiber 303 of third phase position modulator 221; The other end of the 3rd monomode fiber 303 is contained on the beam combination device 304; First monomode fiber 301, second monomode fiber 302, the 3rd monomode fiber 303 outputs carry out multi-form arrangement through beam combination device 304, connect at least three grades of structure for amplifying, and first pumping source 101, second pumping source 201, the 3rd pumping source 202 are identical long wavelength laser with the 4th pumping source 203.
The length of second erbium/ytterbium co-doped fiber 207, the 3rd erbium/ytterbium co-doped fiber 208 and the 4th erbium/ytterbium co-doped fiber 209 is generally less than 10 meters, and concrete length is decided according to the pumping source 201,202 and 203 of actual selection.
From 2104 ports of first coupler 210,2114 ports of second coupler 211 and the 2124 ports output of the 3rd coupler 212,5% component is from 2103 ports of first coupler 210,2113 ports of second coupler 211 and the 2123 ports output of the 3rd coupler 212 from 95% component of the light of the 2122 ports input of 2112 ports of 2102 ports of said first coupler 210, second coupler 211 and the 3rd coupler 212.
Shown in accompanying drawing 2, beam combination device 304 is arranged in equilateral triangle with 3 monomode fiber output cross sections and distributes.
First phase-modulator 219, second phase-modulator 220 and third phase position modulator 221 can be regulated the phase place of the laser of three tunnel outputs, make three tunnel output light have identical output phase.
The concrete implementation of the utility model is: first pumping source 101 is input to the 980nm laser of given power in first erbium/ytterbium doped fiber 104; Make erbium ion be in the population inversion distribution; First fiber grating 102 and second fiber grating, the 103 composition optical resonators that have identical resonance wavelength then carry out the wavelength selection to spontaneous emission light, and the light of the wavelength that is selected is exaggerated formation laser in resonant cavity.Because the total length of resonant cavity is less than 10cm, the laser of provable generation is the single polarization laser of single-frequency.The reflectivity of cause second fiber grating 103 is 90%, and the laser of this moment 10% is exported from resonant cavity as seed light and got into amplifier sections through full fibre optic isolater 105.Seed light at first gets in second erbium/ytterbium doped fibers through first wavelength division multiplexer 204 with the output laser of second pumping source 201 of given power jointly, and this moment, seed light was exaggerated laser after the amplification and seed light same frequency.The light that the light of laser after the amplification through first coupler 210 back 95% enters into first filter 213,5% gets in the next stage amplification system as seed light, and the like.There is the light of 95% after the amplification to get into first filter 213, second filter 214 and the 3rd filter 215 respectively, filters 980nm pump light residual in the light path respectively.Three road light signals are all the single polarization laser of single-frequency, but maybe polarization state different, so the polarization state of regulating three road laser through first Polarization Controller 121, second Polarization Controller 122 and the 3rd Polarization Controller 123 respectively obtains three the tunnel with same polarization laser frequently.Then; Through regulating the phase place that first phase controller 124, second phase controller 125 and third phase level controller 126 are regulated three road laser respectively; Make three road laser respectively through having identical output phase behind first monomode fiber 301, second monomode fiber 302 and the 3rd monomode fiber 303; Last three road monomode fiber outputs carry out beam combination by optical fibre set bundle device 304, and output becomes equilateral triangle arranged distribution (shown in accompanying drawing 2).Can obtain frequency stability height, narrow linewidth, high power and high-brightness laser at last.
Three grades of structure for amplifying described in the utility model are not limited only to three grades, can adopt more multistage structure for amplifying according to actual needs, and output can carry out multi-form arrangement through beam combination device 304 according to actual needs.
As stated, the embodiment of the utility model has been carried out explanation at length, but as long as break away from the inventive point and the effect of the utility model in fact a lot of distortion can not arranged, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection range of the utility model.
Claims (9)
1. coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; Comprise: first pumping source (101), first fiber grating (102), second fiber grating (103), first erbium/ytterbium co-doped fiber (104), full fibre optic isolater (105), second pumping source (201), the 3rd pumping source (202), the 4th pumping source (203), first wavelength division multiplexer (204), second wavelength division multiplexer (205), the 3rd wavelength division multiplexer (206), second erbium/ytterbium co-doped fiber (207), the 3rd erbium/ytterbium co-doped fiber (208), the 4th erbium/ytterbium co-doped fiber (209), first coupler (210), second coupler (211), the 3rd coupler (212), first filter (213), second filter (214), the 3rd filter (215), first Polarization Controller (216), second Polarization Controller (217), the 3rd Polarization Controller (218), first phase-modulator (219), second phase-modulator (220), third phase position modulator (221), first monomode fiber (301), second monomode fiber (302), the 3rd monomode fiber (303) and beam combination device (304); An end of output termination first fiber grating (102) of first pumping source (101) wherein; One end of another termination first erbium/ytterbium co-doped fiber (104) of first fiber grating (102); One end of another termination second fiber grating (103) of first erbium/ytterbium co-doped fiber (104); The input of the full fibre optic isolater of another termination (105) of second fiber grating (103); (2042) port of output termination first wavelength division multiplexer (204) of full fibre optic isolater (105); (2041) port of first wavelength division multiplexer (204) connects the output of second pumping source (201); (2043) port of first wavelength division multiplexer (204) connects an end of second erbium/ytterbium co-doped fiber (207); (2102) port of another termination first coupler (210) of second erbium/ytterbium co-doped fiber (207); (2103) port of first coupler (210) connects (2052) port of second wavelength division multiplexer (205); (2104) port of first coupler (210) connects an end of first filter (213); One end of another termination first Polarization Controller (216) of first filter (213); One end of another termination first phase-modulator (219) of first Polarization Controller (216); One end of another termination first monomode fiber (301) of first phase-modulator (219), the other end of first monomode fiber (301) are contained on the beam combination device (304); (2051) port of second wavelength division multiplexer (205) connects the output of the 3rd pumping source (202); (2053) port of second wavelength division multiplexer (205) connects an end of the 3rd erbium/ytterbium co-doped fiber (208); (2112) port of another termination second coupler (211) of the 3rd erbium/ytterbium co-doped fiber (208); (2113) port of second coupler (211) connects (2062) port of the 3rd wavelength division multiplexer (206); (2114) port of second coupler (211) connects an end of second filter (214), an end of another termination second Polarization Controller (217) of second filter (214), an end of another termination second phase-modulator (220) of second Polarization Controller (217); One end of another termination second monomode fiber (302) of second phase-modulator (220), the other end of second monomode fiber (302) are contained on the beam combination device (304); (2061) port of the 3rd wavelength division multiplexer (206) connects the output of the 4th pumping source (203); (2063) port of the 3rd wavelength division multiplexer (206) connects an end of the 4th erbium/ytterbium co-doped fiber (209); (2122) port of another termination the 3rd coupler (212) of the 4th erbium/ytterbium co-doped fiber (209); (2124) port of the 3rd coupler (212) connects an end of the 3rd filter (215); One end of another termination the 3rd Polarization Controller (218) of the 3rd filter (215); One end of another termination third phase position modulator (221) of the 3rd Polarization Controller (218); One end of another termination the 3rd monomode fiber (303) of third phase position modulator (221), the other end of the 3rd monomode fiber (303) are contained on the beam combination device (304), and first monomode fiber (301), second monomode fiber (302), the 3rd monomode fiber (303) output carry out multi-form arrangement through beam combination device (304); Connect at least three grades of structure for amplifying, first pumping source (101), second pumping source (201), the 3rd pumping source (202) and the 4th pumping source (203) are identical long wavelength laser.
2. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; Said structure for amplifying is three grades of amplifications, and beam combination device (304) is arranged in the equilateral triangle distribution with first monomode fiber (301), second monomode fiber (302), the 3rd monomode fiber (303) output cross section.
3. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that said first pumping source (101), second pumping source (201), the 3rd pumping source (202) and the 4th pumping source (203) are the 980nm long wavelength semiconductor laser.
4. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; Said first fiber grating (102) and second fiber grating (103) directly write on first erbium/ytterbium co-doped fiber (104) through the phase mask method, and have identical resonance wavelength; The resonance wavelength peak reflectivity of first fiber grating (102) is that the resonance wavelength peak reflectivity of 99%, the second fiber grating (103) is 90%; The total length of first fiber grating (102), second fiber grating (103) and first erbium/ytterbium co-doped fiber (104) is less than 10 centimetres.
5. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber is characterized in that, the length of said second erbium/ytterbium co-doped fiber (207), the 3rd erbium/ytterbium co-doped fiber (208) and the 4th erbium/ytterbium co-doped fiber (209) is less than 10 meters.
6. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; From (2104) port of first coupler (210), (2114) port of second coupler (211) and (2124) port output of the 3rd coupler (212), 5% component is from (2103) port of first coupler (210), (2113) port of second coupler (211) and (2123) port output of the 3rd coupler (212) from 95% component of the light of (2122) port input of (2112) port of (2102) port of said first coupler (210), second coupler (211) and the 3rd coupler (212).
7. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that said first filter (213), second filter (214) and the 3rd filter (215) filter out pump light remaining in the optical fiber and the flashlight of generation is passed through fully.
8. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; The polarization state of the laser of three tunnel outputs is regulated through said first Polarization Controller (216), second Polarization Controller (217) and the 3rd Polarization Controller (218), has identical output polarization attitude.
9. a kind of according to claim 1 coherent beam combination high-capacity optical fiber laser based on the short-term chamber; It is characterized in that; The phase place of the laser of three tunnel outputs is regulated through said first phase-modulator (219), second phase-modulator (220) and third phase position modulator (221), has identical output phase.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409954A (en) * | 2014-11-19 | 2015-03-11 | 中国科学院上海光学精密机械研究所 | 1.5 micrometer nanosecond pulse double pass and double clad fiber amplifier |
| CN109742644A (en) * | 2019-03-11 | 2019-05-10 | 安徽天琢激光科技有限公司 | A kind of high power column vector optical fiber laser |
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2011
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409954A (en) * | 2014-11-19 | 2015-03-11 | 中国科学院上海光学精密机械研究所 | 1.5 micrometer nanosecond pulse double pass and double clad fiber amplifier |
| CN109742644A (en) * | 2019-03-11 | 2019-05-10 | 安徽天琢激光科技有限公司 | A kind of high power column vector optical fiber laser |
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Granted publication date: 20120815 Termination date: 20131222 |