AUTHOR=Chen Bin , Bai Zhenxu , Zhao Guijuan , Zhang Yu , Yan Bingzheng , Qi Yaoyao , Ding Jie , Wang Kun , Wang Yulei , Lu Zhiwei 

TITLE=Compound Cavity Passively Q-Switched Single-Longitudinal-Mode Diode-Pumped Laser

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.820177

DOI=10.3389/fphy.2022.820177

ISSN=2296-424X

ABSTRACT=<p>A compact solid-state single-longitudinal-mode (SLM) Q-switched laser based on a compound cavity is demonstrated. SLM operation is achieved through the enhancement of mode competition (<italic>via</italic> manipulation of the effective reflectivity of the resonator mirrors and intracavity field accumulation time) and does not require the use of a feedback loop. In this work, SLM emission with a linewidth of 254.3 MHz is demonstrated, and a high SLM ratio of up to 99.6% is achieved. The laser operates at a repetition rate of 10 Hz, producing 10 ns pulses with a pulse energy of 14.81 mJ.</p>