中国激光, 2013, 40 (4): 0405003, 网络出版: 2013-04-16
高功率纳秒光纤激光器抽运锥形光子晶体光纤产生超连续谱
Supercontinuum Generation from a Tapered Photonic Crystal Fiber Pumped with a High-Power Nanosecond Fiber Laser
激光器 主振荡功率放大 纳秒光纤激光器 锥形光子晶体光纤 超连续谱 lasers master oscillator power amplifier nanosecond fiber laser tapered photonic crystal fiber supercontinuum
摘要
对半导体激光器进行调制得到了中心波长为1060.14 nm、谱宽为0.63 nm、重复频率为1.55 MHz、脉宽为11 ns的纳秒种子激光,进而对其进行三级主振荡功率放大(MOPA),实现了18.2 W高功率、高重复频率纳秒光纤激光器。利用此纳秒光纤激光器及自主研制的光纤模场适配器,抽运145 m锥形光子晶体光纤,实现了最大输出功率为2.2 W的全光纤化白光超连续谱光源,光谱范围为440~1700 nm,在整个光谱可探测范围内具有15 dB的光谱平坦度。
Abstract
By modulating the laser diode, a nanosecond laser with center wavelength of 1064.14 nm, spectral width of 0.63 nm, repetition frequency of 1.55 MHz and pulse width of 11 ns is realized. This seed laser is then amplified to a high-power, high-repetition rate nanosecond fiber laser with an average output power of 18.2 W using a tri-stage master oscillator power amplifier (MOPA) configuration. This nanosecond fiber laser is used to pump a 145 m long tapered photonic crystal fiber with a self-made mode field adaptor (MFA), and a 2.2 W all-fiber white light supercontinuum source is realized with a 15 dB spectral flatness in the detected spectral range from 440 nm to 1700 nm. The spectral edge also corresponds well with the theoretical value.
郭春雨, 欧阳德钦, 阮双琛, 闫培光, 韦会峰, 林怀钦, 伍一鸣, 杨锦辉. 高功率纳秒光纤激光器抽运锥形光子晶体光纤产生超连续谱[J]. 中国激光, 2013, 40(4): 0405003. Guo Chunyu, Ouyang Deqin, Ruan Shuangchen, Yan Peiguang, Wei Huifeng, Lin Huaiqin, Wu Yiming, Yang Jinhui. Supercontinuum Generation from a Tapered Photonic Crystal Fiber Pumped with a High-Power Nanosecond Fiber Laser[J]. Chinese Journal of Lasers, 2013, 40(4): 0405003.