基于棒状光子晶体光纤的35W重复频率可调皮秒掺镱光纤激光器  

35W Yb-doped fiber laser with adjustable repetition rate based on rod-type photonic crystal fiber

作　　者：王勇[1] 袁帅[1] 沈嘉伟 司璐 陈嘉宁 曾和平[1] WANG Yong;YUAN Shuai;SHEN Jiawei;SI Lu;CHEN Jianing;ZENG Heping(School of Optical-Electronic Information and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学技术》2022年第4期421-426,共6页Optical Technique

基　　金：国家重点研发计划(2018YFB0504400)。

摘　　要：针对激光切片技术缺少重频可调激光光源,设计了一种脉冲平均功率35.4W,脉宽12ps,重复频率300kHz~1MHz可调的高功率掺镱光纤皮秒脉冲激光器。激光器采用全光纤振荡器及预放大系统,配合基于棒状光子晶体光纤的主放大系统,并通过在级联放大中加入声光调制器(AOM)调控重复频率,从而实现重复频率可调的高功率皮秒脉冲输出。激光器振荡器及预放大部分的全光纤设计,相较于空间耦合放大具有光路结构简单、环境稳定性高等特点,有望推动高能量飞秒光纤激光工业化进程,提升其在复杂使用环境的适应性。A Yb-doped picosecond fiber laser with 35.4 W for average power, 12 ps for pulse duration, and 300 kHz~1 MHz for repetition rate is designed based on cascade amplification. The oscillator and the pre-amplification system are comprized of all fiber. Rod-type photonic crystal fiber is used as the gain medium of the main amplifier. The output repetition rate can be adjust from 300 kHz to 1 MHz by an Acousto-Optic Modulator(AOM). The all-fiber design of the oscillator and the pre-amplifiers has the characteristics of simple optical path structure and high environmental stability, which is expected to promote the industrialization process of high-energy femtosecond fiber laser and improve its adaptability under complex environment.

关 键 词：光纤光学 超短脉冲 高功率激光 光子晶体光纤 棒状光纤 

分 类 号：O43[机械工程—光学工程]