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

Abstract

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 (via 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.

Stokes linewidth narrowing by stimulated Brillouin scattering in liquid media

“…The seed source was a 1064 nm passively Qswitched Nd:YAG laser with a pulse width of 7.4 ns and a repetition rate of 1 Hz. 32) The seed laser beam passed through two Nd:YAG amplifiers, achieving an output energy of 340 mJ, which was measured using a laser energy meter (OPHIR PE50BB-DIF-C and OPHIR NOVA II). P 1 , P 2 , FR, and HWP 1 formed a spatial optical isolator.…”