High power single-longitudinal-mode cyan laser at 500.8 nm

Abstract

An all solid state single longitudinal mode (SLM) laser at 500.8 nm with 830 mW output power has been demonstrated for the first time. By using a new resonator for doubly resonant, Nd:GdVO 4 and Nd:YAG were pumped by two laser diode arrays coupled by optical fiber, respectively. In the two sub cavities, SLM wavelengths of 1064 and 946 nm were induced by using the twisted mode technique and then mixed into SLM 500.8 nm laser with sum frequency technology. The SLM 500.8 nm laser output of 830 mW was obtained at the incident pump power of 20 W for Nd:GdVO 4 and 23 W for Nd:YAG. The experimental results showed that the intracavity sum frequency mixing by twisted mode technique is an effective method for SLM 500.8 nm laser.