MOPA结构脉冲光纤激光器输出特性的实验研究
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摘要
采用双包层掺镱光纤作为增益介质,多模连续泵浦激光二极管作为泵浦源,构造了两级光放大系统;采用电路直接调制的半导体激光器作为种子源,研制了主振荡功率放大结构全光纤化脉冲光纤激光器。对不同脉冲宽度、重复频率下的激光器输出功率特性和二级放大器的增益特性进行了实验研究。在一级泵浦光功率为2 W、二级泵浦光功率为31 W的条件下,通过对种子源直接调制,得到了中心波长为1.06μm、峰值功率为10.4kW、最大平均功率为21.3 W的脉冲激光输出。在900kHz重复频率下具有最高增益16.7dB。实验结果表明,脉冲宽度和重复频率与激光输出功率呈正相关;在高重复频率下,光放大器增益特性与脉冲宽度呈负相关。
A two-stage optical amplification system is constructed by using double-clad Yb-doped fiber as the gain medium and multi-mode continuous pumped laser diode as the pump source.The circuit-direct modulated semiconductor laser is used as seed source to develop Master-Oscillator Power-Amplified(MOPA)fiberized pulsed fiber lasers.The output power characteristics of the fiber laser and gain characteristics of the secondary amplifier under different pulse width and repetition frequency are studied experimentally.A pulsed laser output with central wavelength of 1.06μm,peak power of 10.4 kW and maximum average power of 21.3 Wis obtained by adjusting the seed source under the condition that the primary pumped power is 2 W and secondary pumped power is 31 W.The maximum gain can reach 16.7 dB at 900 kHz repetition frequency.The experimental results show that the pulse width and repetition frequency are positively correlated with the laser output power.At high repetition frequency,the gain characteristics of optical amplifier are positively correlated with the pulse width.
A two-stage optical amplification system is constructed by using double-clad Yb-doped fiber as the gain medium and multi-mode continuous pumped laser diode as the pump source.The circuit-direct modulated semiconductor laser is used as seed source to develop Master-Oscillator Power-Amplified(MOPA)fiberized pulsed fiber lasers.The output power characteristics of the fiber laser and gain characteristics of the secondary amplifier under different pulse width and repetition frequency are studied experimentally.A pulsed laser output with central wavelength of 1.06μm,peak power of 10.4 kW and maximum average power of 21.3 Wis obtained by adjusting the seed source under the condition that the primary pumped power is 2 W and secondary pumped power is 31 W.The maximum gain can reach 16.7 dB at 900 kHz repetition frequency.The experimental results show that the pulse width and repetition frequency are positively correlated with the laser output power.At high repetition frequency,the gain characteristics of optical amplifier are positively correlated with the pulse width.
引文
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[2]张振荣,胡志云,黄梅生,等.纳秒级激光脉冲展宽系统的分析及应用[J].光学精密工程,2011,19(2):310-315.
[3]楼祺洪.高功率光纤激光器及其应用[M].合肥:中国科学技术大学出版社,2010.
[4]王慧,张江波.基于SESAM的被动锁模掺Yb3+激光器[J].中国集成电路,2016,(4):34-37.
[5]刘伟,陈滔,戴建宁,等.全光纤化的被动式亚纳秒脉冲Yb光纤激光器研究[J].光学学报,2011,31(12):166-170.
[6]Ye W,Wang J,Chen T,et al.Multi-Wavelength Mode-Locked Er/Yb Co-Doped Fiber Laser with Square Nono-Second Pulse Output[J].Laser Phys,2011,21(10):1784-1788.
[7]吕可诚,刘伟伟,李乙钢,等.高效率掺Yb双包层光纤激光器[J].中国激光,2000,27(8):755-756.
[8]孙伟,衣茂斌,王艳辉,等.增益开关半导体激光器产生高重复率的ps光脉冲[J].半导体学报,1991,12(9):575-577.
[9]Gu Chun,Xu Lixin,Chung W H,et al.Gain Switching of an Yb-doped DFB Fiber Laser[J].Optoelectronic Devices and Integration II,2007,6838(08):1-8.
[10]Jiang P P,Yang D Z,Wang Y X,et al.All-Fiberized MOPA Structured Single-Mode Pulse Yb Fiber Laser with a Linearly Polarized Output Power of 30 W[J].Laser Physics Letters,2009,6(5):384-387.
[11]粟荣涛,周朴,肖虎,等.MOPA结构的单频纳秒脉冲全光纤激光器[J].中国激光,2011,38(11):75-78.
[12]Xu Jiangming,Su Rongtao,Xiao Hu,et al.90.4-W All-Fiber Single-Frequency Polarization-Maintained1 083-nm MOPA Laser Employing Ring-Cavity SingleFrequency Seed Oscillator[J].Chinese Optics Lettters,2012,10(3):51-53.
[13]Zawischa I,Plamann K,Fallnich C,et al.All-SolidState Neodymium-based Single-Frequency Master-Oscillator Fiber Power-Amplifier System Emitting 5.5 W of Radiation at 1 064 nm[J].Optics Letter,1999,24(7):469-471.
[14]Zhou C,Liu Y,Zhu R,et al.High-Energy Nanosecond All-Fiber Yb-Doped Amplifier[J].Chinese Optical Letter,2013,11(8):0814031-0814033.