808-nm diode-pumped dual-wavelength passively Q-switched Nd:LuLiF4 laser with Bi-doped GaAs

• Passively Q-switched Nd:LuLiF4 laser with Bi-doped GaAs is first investigated.
• Simultaneous CW and QS dual-wavelength laser at 1047 and 1053 nm is realized.
• The largest single pulse energy is achieved by the higher transmission of OC.
• The minimal pulse duration is obtained by the lower transmission of OC.

Diode-pumped CW and passively Q-switched Nd:LuLiF4 lasers with stable, synchronous dual-wavelength operations near 1047 and 1053 nm were demonstrated for the first time. The maximal CW output power of 821 mW was obtained at an incident pump power of 6.52 W. Employing high quality Bi-doped GaAs as saturable absorber, stable dual-wavelength Q-switched operation was realized. Under 6.52 W incident pump power, the minimal pulse duration of 1.5 ns, the largest single pulse energy of 11.32 μJ, and the highest peak power of 7.25 kW were achieved.