Single-frequency Ti:Er:LiNbO3 distributed Bragg reflector waveguide laser with thermally fixed photorefractive cavity

The first single-frequency Ti:Er:LiNbO3 distributed Bragg reflector waveguide laser with two thermally fixed photorefractive gratings as resonator mirrors is reported. The optically pumped (λp=1480 nm,120-mW incident power) laser emits up to 1.1 mW at λs=1561.1 nm. The threshold pump power is 70 mW.