Abstract

A continuous-wave high-power single-frequency laser with dual-wavelength output at 1064 and 532 nm is presented. The dependencies of the output power on the transmission of the output coupler and the phase-matching temperature of the ${\mathrm{LiB}}_3{\mathrm{O}}_5$ (LBO) crystal are studied. An output coupler with transmission of 19% is used, and the temperature of LBO is controlled to the optimal phase-matching temperature of 422 K; measured maximal output powers of 33.7 W at 1064 nm and of 1.13 W at 532 nm are obtained with optical–optical conversion efficiency of 45.6%. The laser can be single-frequency operated stably and mode-hop-free, and the measured frequency drift is less than 15 MHz in 1 min. The measured $M_x^2$ and $M_y^2$ for the 1064 nm laser are 1.06 and 1.09, respectively. The measured $M_x^2$ and $M_y^2$ for the 532 nm laser are 1.12 and 1.11, respectively.

© 2014 Optical Society of America

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