Single-longitudinal-mode operation of a 2.09 μm holmium laser with anti-misalignment corner cube ring cavity

Abstract

A single-longitudinal-mode (SLM) 2.09 µm Ho:YAG laser with anti-misalignment corner cube ring cavity was demonstrated. Unidirectional components composed of a faraday rotator and half-wave plate were used to organize the travelling wave beam propagation and to eliminate the spatial hole-burning effect. The maximum SLM power was 728 mW. The corresponding slope efficiency achieved 23.42% and the optical conversion efficiency was 7.16%. Widely tunable wavelength outputs from 2090.43 nm to 2098.37 nm have been achieved by employing a Fabry-Perot etalon. With the advantage of long cavity length and small volume, this structure of the Ho:YAG SLM laser with corner cube ring cavity is a potentially useful way to ensure narrow linewidth output and strong anti-misalignment stability.

Acousto-Optic Q-Switched Ho:YLF Ring Laser Based on Anti-Misalignment Resonant Cavity

“…The output power decreased by 30% when the angle of the CCR was shifted by 11.8 • , proving the anti-misalignment of the ring oscillator with CCRs. Wu et al demonstrated a narrow linewidth laser with two CCRs at 2.09 µm with a power of 728 mW, the corresponding slope efficiency was 23.42% [21]. In injection-locked lasers, Zhang et al reported a 1.6 µm injection-locked laser system at a repetition rate of 143 Hz [22], which employed a ring oscillator with double CCRs as the slave laser, delivering the energy of approximately 2 mJ.…”