中国激光, 2010, 37 (1): 64, 网络出版: 2010-01-16
自由耦合输出的高功率全正色散光子晶体光纤飞秒激光器
Free-Output-Coupler High-Power All-Normal-Dispersion Femtosecond Photonic Crystal Fiber Laser
激光器 飞秒激光 光纤激光器 全正色散 自由耦合输出 光子晶体光纤 锁模 lasers femtosecond laser fiber laser all-normal-dispersion free-output-coupler photonic crystal fiber mode-locked
摘要
报道了一种工作于全正色散(ANDi)区,具有自由耦合输出特点,腔型结构极为简单的高功率被动锁模飞秒光纤激光器。该激光器利用具有极低非线性系数的掺Yb3＋双包层大模场面积光子晶体光纤作为激光增益介质,光纤一端打磨成光滑的0角作为一端腔镜及自由耦合输出端,提供4％的反馈光用于维持腔内激光振荡。利用半导体可饱和吸收镜 (SESAM) 启动并维持稳定锁模,直接输出得到平均功率2.5 W,脉冲宽度2 ps的高功率超短脉冲,对应单脉冲能量44 nJ,脉冲经腔外压缩至430 fs。
Abstract
A simple dispersion-compensation-free high power mode-locked femtosecond fiber laser with free output coupler is demonstrated. A segment of ytterbium(Yb)-doped double cladding large-mode-area photonic crystal fiber is explored as gain media of the laser. One end-face of the fiber is polished to 0° providing 4% feedback serves as a cavity mirror and a free output coupler. Stable mode-locking is obtained by using a high modulation semiconductor saturable absorber mirror(SESAM). The laser system generates 2.5 W,2 ps,44 nJ pulses that can be dechirped to 430 fs duration outside the cavity.
张玉颖, 张驰, 胡明列, 宋有建, 王清月. 自由耦合输出的高功率全正色散光子晶体光纤飞秒激光器[J]. 中国激光, 2010, 37(1): 64. Zhang Yuying, Zhang Chi, Hu Minglie, Song Youjian, Wang Qingyue. Free-Output-Coupler High-Power All-Normal-Dispersion Femtosecond Photonic Crystal Fiber Laser[J]. Chinese Journal of Lasers, 2010, 37(1): 64.
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