Abstract
The Q-switch, high peak power oscillation of a laser-diode pumped Er, Yb: glass laser at eye-safe wavelengthhas been realized using a three-mirror coupled-cavity, low-loss and fast piezoelectric actuator Q-switch. Highpeak power of 3 kW was obtained with a pulse width of 4 ns and output energy of 12 μJ. The resonancecondition of the threshold gain of the coupled-cavity laser was calculated. In the case where the free spectralrange (FSR) of the external cavity is selected to be equal to the gain cavity FSR, the multi-axial mode pulse canoscillate and resulted in a high peak output power. By scanning the external mirror, the single-axial modeoscillation was step-tunable from 1535 nm to 1565 nm.
