2μm附近的半导体可饱和吸收镜被动调Q光纤激光器。

Semiconductor saturable absorber mirror passively Q-switched fiber laser near 2 μm.

作者信息

Yang Weiqiang, Hou Jing, Zhang Bin, Song Rui, Liu Zejin

机构信息

College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China.

出版信息

Appl Opt. 2012 Aug 10;51(23):5664-7. doi: 10.1364/AO.51.005664.

DOI:10.1364/AO.51.005664

PMID:22885579

Abstract

A passively Q-switched fiber laser near 2 μm is achieved with a semiconductor saturable absorber mirror (SESAM) as a saturable absorber. Stable Q-switched pulses are generated from an extremely compact setup with a central wavelength of 1958.2 nm. Under the bidirectional pump configuration, the repetition rate of the fiber laser can be widely tuned from 20 to 80 kHz by increasing the pump power at the same time the pulse width decreases from 1 μs to 490 ns. When the incident pump power is 1.3 W, the average output power, the pulse repetition rate, the pulse width, and the highest single pulse energy are 91 mW, 80 kHz, 490 ns, and 1.14 μJ, respectively. To further optimize the system configuration, the pulse width can be reduced to 362 ns when the cavity length is reduced.

摘要

采用半导体可饱和吸收镜（SESAM）作为可饱和吸收体，实现了一种中心波长接近2μm的被动调Q光纤激光器。通过一个极其紧凑的装置产生了稳定的调Q脉冲，中心波长为1958.2nm。在双向泵浦配置下，通过增加泵浦功率，光纤激光器的重复频率可在20至80kHz范围内广泛调谐，同时脉冲宽度从1μs减小到490ns。当入射泵浦功率为1.3W时，平均输出功率、脉冲重复频率、脉冲宽度和最高单脉冲能量分别为91mW、80kHz、490ns和1.14μJ。为了进一步优化系统配置，当腔长减小时，脉冲宽度可减小到362ns。