High-power eye-safe KTA-OPO driven by YVO_(4)/Nd:YVO_(4) composite laser

摘要

We present a high-power 1.53 (mu)m laser based on intracavity KTA-OPO driven by diode-end-pumped acoustooptical Q-switched YVO_(4)/Nd:YVO_(4) composite. The composite crystal was utilized for reducing the thermal effect, and the mode mismatch compensating OPO cavity was designed for efficient OPO conversion. The output power of eye-safe laser at 1535 nm was up to 4.4 W with the pump power of 27 W, corresponding to a diode-to-signal conversion efficiency of 16.3percent. To our knowledge, this is the highest output power in diode-end-pumped circumstances. In the experiment, the strong yellow light generated by Raman conversion and frequency doubling in the KTA crystal was observed.