IEEE Photonics Journal (Jan 2022)

Dynamics Simulation and Experimental Investigation of Q-Switching in a Self-Mode-Locked Semiconductor Disk Laser

  • Peng Zhang,
  • Renjiang Zhu,
  • Tao Wang,
  • Yadong Wu,
  • Cunzhu Tong,
  • Lijie Wang,
  • Yanrong Song

DOI
https://doi.org/10.1109/JPHOT.2022.3201986
Journal volume & issue
Vol. 14, no. 5
pp. 1 – 8

Abstract

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Q-switching in a mode-locked laser not only makes the amplitude of every single output pulse unequal, but also limits the time width and peak power of output pulses. This paper investigates the Q-switching in a self-mode-locked semiconductor disk laser numerically and experimentally. By using the delay differential equations for passively mode-locking, conditions of Q-switching in a self-mode-locked semiconductor disk laser are numerically analyzed for the first time. Meanwhile, based on the experimental results, the causes of Q-switching tendency including the change of nonlinear refractive index and the change of soft aperture, are also discussed. Some possible measures to suppress Q-switching instability, i.e., to obtain stable continuous-wave mode-locking in a self-mode-locked semiconductor disk laser are proposed.

Keywords