强激光与粒子束, 2011, 23 (9): 2315, 网络出版: 2011-10-27
超低频率全正色散半导体可饱和吸收镜被动锁模光纤激光器
Ultralow repetition rate allnormaldispersion passively modelocked fiber laser based on SESAM
光纤激光器 被动锁模 半导体可饱和吸收镜 腔长 fiber laser passively modelocking semiconductor saturable absorber mirror cavity length
摘要
通过延长激光器环形腔腔长,利用高浓度掺杂的单模掺镱光纤,搭建了超低重复频率、全正色散结构的半导体可饱和吸收镜被动锁模光纤激光器。激光器的中心波长、重复频率、平均功率及单脉冲能量分别为1 064 nm,281.5 kHz,11 mW和39 nJ。为了稳定中心波长,实现自启动,激光器腔体内接入了一个带通滤波器。该激光器运行稳定,无调Q不稳定现象,极大减小了半导体可饱和吸收镜被损坏的机会。
Abstract
An ultralowrepetitionrate, allnormaldispersion fiber laser is proposed which is passively modelocked by an SESAM (semiconductor saturable absorber mirror) with ultra long cavity length and high concentration single mode ytterbiumdoped fiber. The central wavelength, repetition rate, average power and energy of a single output pulse are 1 064 nm, 281.5 kHz, 11 mW and 39 nJ, respectively. A bandpass filter is employed in the cavity to stabilize the central wavelength and realize selfstart operation. The laser operates stably and has no Qswitching instabilities, which greatly reduces the damage probability of the SESAM.
宋锐, 陈胜平, 侯静, 陆启生, 冯庆奇. 超低频率全正色散半导体可饱和吸收镜被动锁模光纤激光器[J]. 强激光与粒子束, 2011, 23(9): 2315. Song Rui, Chen Shengping, Hou Jing, Lu Qisheng, Feng Qingqi. Ultralow repetition rate allnormaldispersion passively modelocked fiber laser based on SESAM[J]. High Power Laser and Particle Beams, 2011, 23(9): 2315.