Doubly passively Q-switched Yb:NaY(WO4)2laser with dual-wavelength phenomenon

A diode pumped doubly passively Q-switched laser was realized for the first time to our knowledge. Compared with the singly passively Q-switched laser, this laser can generate a higher repetition rate, and more symmetric and shorter pulses. The highest repetition rate and shortest pulse width was measured to be 82 kHz and 6 ns. At certain pump power, 1022 and 1026 nm dual-wavelength lasers were obtained, and the mechanism of this phenomenon was discussed.