Preparation of Bi_(2)Te_(3) Based on Saturable Absorption System and Its Application in Fiber Lasers  

作　　者：王浩宇 肖悦嘉 刘齐 邢笑伟 杨胡江 刘文军 Haoyu Wang;Yue-Jia Xiao;Qi Liu;Xiao-Wei Xing;Hu-Jiang Yang;and Wen-Jun Liu(State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《Chinese Physics Letters》2023年第11期62-65,共4页中国物理快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2022YFB4601101);the Beijing Natural Science Foundation(Grant No.JQ21019);the National Natural Science Foundation of China(Grant Nos.11975001,12075034,and 12261131495)。

摘　　要：Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology.Its pulse output can be divided into Q-switched and mode-locked.Achieving ultrashort pulse with narrower pulse duration and higher power is the focus of current research on mode-locked lasers.As an important component of fiber laser systems,saturable absorber(SA) can modulate losses in the optical cavity and generate pulses,enabling the laser system to achieve pulse output under long-term normal operating conditions better.Therefore,expanding the selection range of materials with better saturable absorption properties to improve the quality of pulse output is an important topic in current research.Here,the second generation topological insulator Bi_(2)Te_(3) single crystal is prepared,and a ring fiber laser system is built with the Bi_(2)Te_(3) SA.The mode-locked pulse with a pulse duration of 288 fs and a signal-to-noise ratio of 80.202 dB is realized.This result verifies that Bi_(2)Te_(3),as a member of topological insulator,has good saturable absorption characteristics,and has broad prospects for the application research in lasers.

关 键 词：FIBER SWITCHED MODE 

分 类 号：TN248[电子电信—物理电子学]