All-solid-state acousto-optic mode-locked laser operating at 660 nm

Red lasers with a picosecond pulse width are widely used in various fields such as industrial, medical, scientific research and information strorage due to their narrow pulse width and high peak power. This paper presents an all -solid-state laser, operating at 660 nm with picosecond pulse width, narrow band, and high conversion efficiency, which is demonstrated by the acousto-optic mode -locked (AOML) method. By optimizing the cavity and implementing external frequency doubling with two LiB3O5 (LBO) crystals along with various techniques, a mode -locked red laser source with a maximum output power of 8.6 W is developed. The laser operates in a pulsed side -pumped regime and contains the mode -locked pulses with a frequency of 100 MHz and a pulse width of 887 ps. The optical -to -optical conversion efficiency from 1 319 nm to 660 nm can reach up to 41%.