High Beam Quality Plano-convex Resonator Nd: YVO4 Laser.

It is proposed to achieve high beam quality 1 064 nm laser output by using an 878.6 nm LD end-pumped Nd: YVO₄ crystal. Matlab software is utilized for simulating and analyzing the thermal lens focal length of the crystal, and an appropriate plano-convex resonator cavity configuration is selected through software calculation to alleviate thermal effects and achieve optimal output conditions. At a pump power of 48 W, an average output power of 15.03 W of 1 064 nm continuous light output is obtained. By employing RTP electro-optic Q-switching, stable 1 064 nm pulsed laser output is achieved at a repetition rate of 10 kHz, with a maximum average output power of 8.78 W, a dynamic-to-static conversion efficiency of 72.9%, a pulse width of 8.70 ns, and a beam quality factor of 1.2. The experiments demonstrate that using a pump source at 878.6 nm and employing a flat-convex resonator cavity configuration are beneficial for mitigating crystal thermal effects, improving beam quality, and obtaining fundamental mode pulsed laser output. [ABSTRACT FROM AUTHOR]