吉赫兹级窄线宽、高峰值功率纳秒光纤激光器
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摘要
报道了基于主振荡功率放大(MOPA)工作方式的吉赫兹级窄线宽、高峰值功率光纤激光器。该激光器以脉冲调制的分布反馈式单频半导体激光器为种子源,波长为1064.12nm,脉冲宽度为3.92ns,重复频率在10~50kHz内连续可调。采用光纤双程放大结构的预放大级以增加小信号放大能力并抑制强抽运下的自发放大辐射,优化功率放大级光纤长度以抑制窄线宽激光放大过程中的受激布里渊散射,在重复频率为10kHz时,获得光谱线宽为1.5GHz、峰值功率达15kW的脉冲激光输出。实验研究了不同重复频率时的输出激光脉冲特性。
A GHz narrow-linewidth high-peak power nanosecond fiber laser based on the master oscillator power amplifier(MOPA)is reported.The modulated distributed feedback single-frequency diode laser seed delivers pulses with wavelength of 1064.12 nm,pulse width of 3.92 ns,and tunable repetition rate from 10 kHz to 50 kHz.A double-pass structure is used in the preamplifier to boost small signal and suppress amplification of spontaneous emission under intense pump.In the power amplifier the stimulated Brillouin scattering is avoided by shortening fiber length.Pulsed laser with 1.5GHz linewidth and 15 kW peak power is obtained at a repetition rate of 10 kHz.The output pulse characteristics at different repetition rates are studied.
A GHz narrow-linewidth high-peak power nanosecond fiber laser based on the master oscillator power amplifier(MOPA)is reported.The modulated distributed feedback single-frequency diode laser seed delivers pulses with wavelength of 1064.12 nm,pulse width of 3.92 ns,and tunable repetition rate from 10 kHz to 50 kHz.A double-pass structure is used in the preamplifier to boost small signal and suppress amplification of spontaneous emission under intense pump.In the power amplifier the stimulated Brillouin scattering is avoided by shortening fiber length.Pulsed laser with 1.5GHz linewidth and 15 kW peak power is obtained at a repetition rate of 10 kHz.The output pulse characteristics at different repetition rates are studied.
引文
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5 Teodoro F D,Morais J,Mccomb T S,etal..SBS-managed high-peak-power nanosecond-pulse fiber-based master oscillator power amplifier[J].Optics Letters,2013,38(13):2162-2164.
6 Saracco M J,Logan D,Green J,et al..Compact 17 Waverage power 100kW peak power nanosecond fiber laser system[C].SPIE,2013,8601:86012U.
7 Zhou Cuiyun,Liu Yuan,Du Songtao,et al..1030nm high repetition rate nanosecond pulse all fiber amplifier[J].Chinese J Lasers,2011,38(8):0802010.周翠芸,刘源,杜松涛,等.1030nm高重复频率纳秒脉冲全光纤放大器[J].中国激光,2011,38(8):0802010.
8 Yang Yan,Yu Dunhe,Wu Yaofang,et al..Design of a novel drive power for narrow pulse laser diode[J].Chinese JLasers,2011,38(2):0202003.杨燕,俞敦和,吴姚芳,等.新型窄脉冲半导体激光器驱动电源的研制[J].中国激光,2011,38(2):0202003.
9 Teodoro F D,Belden P,Ionov P,et al..High-power ns-pulse fiber laser sources for remote sensors[J].Optical Fiber Technology,2014,20(6):688-693.
10 Ran Yang,Wang Xiaolin,Su Rongtao,et al..Research progress of stimulated Brillouin scattering suppression in narrow linewidth fiber amplifiers[J].Laser&Optoelectronics Progress,2015,52(4):040003.冉阳,王小林,粟荣涛,等.窄线宽光纤放大器中受激布里渊散射抑制研究进展[J].激光与光电子学进展,2015,52(4):040003.
11 Ran Yang,Wang Xiaolin,LüHaibin,et al..Novel suppression method study for stimulated Brillouin scattering by simultaneous phase and intensity modulation in fiber amplifiers[J].Chinese J Lasers,2015,42(8):0805003.冉阳,王小林,吕海斌,等.种子相位和强度同时调制抑制光纤激光放大器SBS的新方法研究[J].中国激光,2015,42(8):0805003.
12 Kong Lingfeng,Lou Qihong,Zhou Jun,et al..Frequency response and transient gain of Yb-doped double clad fiber amplifier[J].Acta Photonica Sinica,2004,33(11):1286-1289.孔令峰,楼祺洪,周军,等.掺Yb双包层光纤放大器的瞬态增益和频率响应[J].光子学报,2004,33(11):1286-1289.
2 Koroshetz J E.Fiber lasers for lidar[C].IEEE Optical Fiber Communication Conference,Washington,2005.
3 Feng Yutong,Du Songtao,Yang Yan,et al..All-fiber laser based on LD pulse-modulated MOPA architecture[J].Chinese J Lasers,2009,36(8):1932-1936.冯宇彤,杜松涛,杨燕,等.基于LD脉冲调制的全光纤MOPA结构激光器[J].中国激光,2009,36(8):1932-1936.
4 Lou Qihong,Du Songtao,Zhou Jun.Advanced fiber laser technology[J].Infrared and Laser Engineering,2008,37(S):1-7.楼祺洪,杜松涛,周军.先进光纤激光技术[J].红外与激光工程,2008,37(S):1-7.
5 Teodoro F D,Morais J,Mccomb T S,etal..SBS-managed high-peak-power nanosecond-pulse fiber-based master oscillator power amplifier[J].Optics Letters,2013,38(13):2162-2164.
6 Saracco M J,Logan D,Green J,et al..Compact 17 Waverage power 100kW peak power nanosecond fiber laser system[C].SPIE,2013,8601:86012U.
7 Zhou Cuiyun,Liu Yuan,Du Songtao,et al..1030nm high repetition rate nanosecond pulse all fiber amplifier[J].Chinese J Lasers,2011,38(8):0802010.周翠芸,刘源,杜松涛,等.1030nm高重复频率纳秒脉冲全光纤放大器[J].中国激光,2011,38(8):0802010.
8 Yang Yan,Yu Dunhe,Wu Yaofang,et al..Design of a novel drive power for narrow pulse laser diode[J].Chinese JLasers,2011,38(2):0202003.杨燕,俞敦和,吴姚芳,等.新型窄脉冲半导体激光器驱动电源的研制[J].中国激光,2011,38(2):0202003.
9 Teodoro F D,Belden P,Ionov P,et al..High-power ns-pulse fiber laser sources for remote sensors[J].Optical Fiber Technology,2014,20(6):688-693.
10 Ran Yang,Wang Xiaolin,Su Rongtao,et al..Research progress of stimulated Brillouin scattering suppression in narrow linewidth fiber amplifiers[J].Laser&Optoelectronics Progress,2015,52(4):040003.冉阳,王小林,粟荣涛,等.窄线宽光纤放大器中受激布里渊散射抑制研究进展[J].激光与光电子学进展,2015,52(4):040003.
11 Ran Yang,Wang Xiaolin,LüHaibin,et al..Novel suppression method study for stimulated Brillouin scattering by simultaneous phase and intensity modulation in fiber amplifiers[J].Chinese J Lasers,2015,42(8):0805003.冉阳,王小林,吕海斌,等.种子相位和强度同时调制抑制光纤激光放大器SBS的新方法研究[J].中国激光,2015,42(8):0805003.
12 Kong Lingfeng,Lou Qihong,Zhou Jun,et al..Frequency response and transient gain of Yb-doped double clad fiber amplifier[J].Acta Photonica Sinica,2004,33(11):1286-1289.孔令峰,楼祺洪,周军,等.掺Yb双包层光纤放大器的瞬态增益和频率响应[J].光子学报,2004,33(11):1286-1289.