光学学报, 2023, 43 (17): 1714009, 网络出版: 2023-09-22  

高功率高光束质量级联泵浦掺镱光纤激光器研究进展 下载: 1714次特邀综述

Research Progress in Tandem-Pumped High-Power and High-Beam Quality Ytterbium-Doped Fiber Laser
肖虎 1,2李瑞显 1,2吴函烁 1,2黄良金 1,2陈子伦 1,2杨欢 1,2闫志平 1,2王蒙 1,2潘志勇 1,2王泽锋 1,2,*周朴 1,**陈金宝 1,2,***
作者单位
1 国防科技大学前沿交叉学科学院,湖南 长沙 410073
2 国防科技大学南湖之光实验室,湖南 长沙 410073
图 & 表

图 1. 高光束质量YDFL功率提升趋势36

Fig. 1. Power evolution of YDFL with high beam quality[36]

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图 2. 芯径为48 μm、NA=0.065的光纤中弯曲损耗和基模模场面积随弯曲半径的变化。(a)弯曲损耗;(b)基模模场面积

Fig. 2. Variation of bending loss and mode area of fundamental mode with bending radius in 48 μm core diameter and NA=0.065 fibers. (a) Bending loss; (b) mode area

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图 3. LP11o模式的弯曲损耗随光纤芯径和弯曲直径的变化

Fig. 3. Bending loss of LP11o mode varied with fiber core diameter and bending diameter

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图 4. 1080 nm信号回光对1018 nm激光器的影响分析51。(a)实验装置图;(b)1018 nm振荡器功率随注入1080 nm回光变化的实验和仿真结果;(c)不同YDF长度下的1018 nm振荡器功率随注入1080 nm回光变化的仿真结果;(d)不同1080 nm回光功率下的1018 nm振荡器功率随低反光栅反射率变化的仿真结果

Fig. 4. Influence of 1080 nm return signal laser on 1018 nm oscillator[51]. (a) Experimental setup; (b) experimental and simulation results of 1018 nm oscillator power changing with the injected 1080 nm return laser; (c) simulation results of 1018 nm oscillator power changing with the injection of 1080 nm return light under different YDF lengths; (d) simulation results of 1018 nm oscillator power changing with the reflectivity of OC-FBG under different return 1080 nm power

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图 5. 基于25/250 μm双包层YDF的后向级联泵浦放大器51。(a)实验结构图;(b)输出功率;(c)不同功率下的输出光谱;(d)3.94 kW时前向和后向泵浦级联泵浦放大器的输出光谱

Fig. 5. Backward tandem-pumped amplifier based on 25/250 μm double-clad YDF[51]. (a) Experimental setup; (b) output power; (c) output spectra under different power; (d) output spectra of forward and backward tandem-pumped amplifiers at 3.94 kW

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图 6. 基于30/250 μm双包层YDF的双向级联泵浦放大器52。(a)实验结构图;(b)输出功率和效率曲线;(c)不同功率下的光谱;(d)不同功率下的光束质量和光斑形态;(e)6.22 kW时的输出时序和频谱

Fig. 6. Bi-directional tandem-pumped amplifier based on 30/250 μm double-clad YDF[52]. (a) Experimental setup; (b) output power and efficiency curves; (c) output spectra under different power; (d) beam quality and beam profile under different power; (e) output time trace and spectra at 6.22 kW

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图 7. 10 kW激光器测试结果54。(a)输出功率随泵浦功率变化;(b)光谱随输出功率变化;(c)光束质量随功率变化;(d)时序和频谱(插图)

Fig. 7. Experimental results of 10 kW fiber laser[54]. (a) Output power versus pump power; (b) spectra versus output power; (c) beam quality versus output power; (d) power fluctuation and its Fourier spectra (inset)

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图 8. 不同弯曲半径下的模场分布(白色虚线为纤芯范围)

Fig. 8. Mode field distribution under different bending radii ( white dotted line is the core range )

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图 9. 当放大器弯曲半径为0.15 m和0.3 m时,在注入不同模式纯度种子情况下输出激光模式纯度随相对掺杂半径的变化55。(a)0.15 m;(b)0.3 m

Fig. 9. When bending radius of the amplifier is 0.15 m and 0.3 m, output laser mode purity varied with relative doping radius under different mode purity seed injection55. (a) 0.15 m; (b) 0.3 m

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图 10. 放大器输出激光模式纯度随芯径及掺杂比的变化55

Fig. 10. Output laser mode purity of the amplifier varies with the core diameter and doping ratio[55]

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图 11. 基于40/250 μm CYDF的前向级联泵浦放大器62。(a)功率和效率曲线;(b)不同功率下的光谱;(c)基于CYDF放大器的光束质量变化;(d)基于YDF放大器的光束质量变化

Fig. 11. Forward tandem-pumped amplifier based on 40/250 μm CYDF[62]. (a) Power and efficiency curves; (b) output spectra under different power; (c) beam quality of CYDF-based amplifier under different power; (d) beam quality of YDF-based amplifier under different power

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图 12. 基于40/250 μm CYDF的前向级联泵浦放大器实验结果63。(a)纤芯折射率分布;(b)光纤截面照片;(c)不同泵浦功率下的输出功率与光光效率(插图:最高输出功率时的功率计读数);(d)不同激光功率下的输出光谱

Fig. 12. Experimental results of forward tandem-pumped amplifier based on 40/250 μm CYDF[63]. (a) Refractive index distribution of fiber core; (b) cross-section photo of the fiber; (c) output power and optical-to-optical efficiency at different pump power (inset: power meter at maximum output power); (d) output spectra at different power

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图 13. 基于40/250 μm CYDF的双向级联泵浦放大器实验结果64。(a)激光器结构;(b)输出功率随泵浦功率的变化;(c)不同功率下的光谱;(d)最高功率下的时序及频谱;(e)最高功率下的光束质量

Fig. 13. Experimental results of bi-directional tandem-pumped amplifiers based on 40/250 μm CYDF[64]. (a) Laser structure; (b) output power versus pump power; (c) output spectra under different power; (d) output time trace and spectrum at maximum power; (e) beam quality at maximum power

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图 14. 基于40/250 μm CYDF的后向级联泵浦放大器测试结果65。(a)输出功率随泵浦功率的变化;(b)不同功率下的光谱;(c)不同功率下的光束质量

Fig. 14. Experimental results of backward tandem-pumped amplifier based on 40/250 μm CYDF[65]. (a) Output power versus pump power; (b) spectra under different power; (c) beam quality at different power

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图 15. 基于30/250~48/400 μm STYDF的后向级联泵浦放大器实验结果。(a)TYDF纵向截面图;(b)不同功率下的光谱;(c)输出功率随泵浦功率的变化;(d)基于TYDF放大器的光束质量变化;(e)基于YDF放大器的光束质量变化

Fig. 15. Experimental results of backward tandem-pumped amplifiers based on 30/250-48/400 μm STYDF. (a) TYDF longitudinal section; (b) spectra under different power; (c) output power versus pump power; (d) beam quality of TYDF-based amplifier under different power; (e) beam quality of YDF-based amplifier under different power

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图 16. 包层掺氟光纤结构图108。(a)包层截面;(b)包层折射率分布化

Fig. 16. Structure of YDF with F-doped inner cladding[108]. (a) Cross section of inner cladding; (b) 2D refractive index of inner cladding

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图 17. 10 kW单模光纤激光器结构示意图

Fig. 17. Schematic of 10 kW single mode fiber laser

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表 1高功率部分掺杂掺镱光纤激光器的典型实验结果

Table1. Typical experimental results of high power confined doped ytterbium-doped fiber lasers

InstituteCountryYearFiber geometry /μmPower /kWM2Pumping schemeRef.
FujikuraJapan2016/21.2LD56
FujikuraJapan2017/31.3LD57
HUSTChina201825/35/4000.451.5LD58
DSOSingapore201831.5/42/2504.11.59Tandem18
HUSTChina201923/33/3951.21.43LD59
CETCChina202020/30/4002.41.32LD60
CAEPChina202118/30/4003.57

Mx2=1.942

My2=1.774

LD61

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表 2不同光纤弯曲半径时各个模式与掺杂区域的重叠因子

Table2. Overlap factor of each mode with doping region under different fiber bending radii

Bending radius /mOverlap factor /%
LP01LP11oLP11eLP21oLP21eLP02
0.581.6764.3264.1448.6248.6254.21
0.272.5962.0851.2249.2849.2852.62
0.141.8456.1334.8049.5649.7341.62
0.0511.2239.4822.9539.2349.1342.22

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表 3基于STYDF的典型高功率激光实验结果

Table3. Typical experiment results of high power laser employing STYDF

InstituteCountryYearFiber geometry /μmFiber length /mPower /WM2Ref.
TUTFinland20086.5/200-26/80020212<1.0269
TUTFinland200910.8/145-65/83924600<1.0870
TUTFinland201020/320-58/93023.57501.771
INOCanada201635/250-56/4002.8100<1.272
NUDTChina201721.2/417.3-30.4/609.63314701.873
NUDTChina201820/237.1-46.9/579.97.22602.2774
TUTFinland201813/110-96/7923.3701.0975
NUDTChina201920/400-30/6003317202.176
NUDTChina201920/400-30/6002221702.277
NUDTChina202030/250-49/4041.275501.4778
CAEPChina202110/155-26/4001812001.279
NUDTChina202235/250-56/4003.8694<1.3580
NUDTChina202220/400-30/6001740001.4681
NUDTChina202220/400-30/60035.461102.5782
AmpliconyxFinland202210/100-97/9707.5513<283

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表 4基于30/250~48/400 μm TYDF的级联泵浦放大器SRS阈值仿真结果

Table4. Calculated SRS threshold of tandem-pumped amplifier based on 30/250-48/400 μm TYDF

L1L2L3 /mAverage core diameter /μmPSRS /W(forward pump)PSRS /W(backward pump)
40,0,03040449393
5,34,138.1732020259
5,30,539771121326
5,25,1040.125818322393
5,20,1541.25873123295
5,15,2042.375927923871
5,10,2543.5982724363
10,29,136.975677219276
10,25,537.875712420344
10,20,1039759421574
10,15,1540.125810422639
10,10,2041.25865223297
0,0,40481099924939

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肖虎, 李瑞显, 吴函烁, 黄良金, 陈子伦, 杨欢, 闫志平, 王蒙, 潘志勇, 王泽锋, 周朴, 陈金宝. 高功率高光束质量级联泵浦掺镱光纤激光器研究进展[J]. 光学学报, 2023, 43(17): 1714009. Hu Xiao, Ruixian Li, Hanshuo Wu, Liangjin Huang, Zilun Chen, Huan Yang, Zhiping Yan, Meng Wang, Zhiyong Pan, Zefeng Wang, Pu Zhou, Jinbao Chen. Research Progress in Tandem-Pumped High-Power and High-Beam Quality Ytterbium-Doped Fiber Laser[J]. Acta Optica Sinica, 2023, 43(17): 1714009.

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