AUTHOR=Ling Weijun , Xia Tao , Sun Rui , Chen Chen , Xu Qiang , Zhang Yani 

TITLE=Low Threshold, High Efficiency Passively Mode-Locked Picosecond Tm,Ho:LiLuF4 Laser

JOURNAL=Frontiers in Physics

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2019.00216

DOI=10.3389/fphy.2019.00216

ISSN=2296-424X

ABSTRACT=<p>We experimentally demonstrated a passively mode-locked picosecond Tm,Ho:LiLuF<sub>4</sub> laser with low threshold and high efficiency. The stable continuous-wave (CW) mode-locked operation with 12 ps pulse width is obtained by using a five-mirror cavity structure and semiconductor saturable absorber mirrors (SESAMs). The results indicate that the laser offers a mode-locked threshold power of 1.03 W and maximum mode-locked output power of 350 mW. The repetition rate of mode-locked pulse sequence is 98.04 MHz, corresponding a maximum single pulse energy of 3.51 nJ.</p>