An LD pumped YAG-KTP intracavity frequency doubling laser has been developed. A cw linearly polarized green laser at 532 nm is obtained. The pumping threshold, output power, and slope efficiency are 12 mW, 2.5 mW, and 5%, respectively. The influence of the states of pump light on transverse modes of the frequency doubling laser has been studied. The experimental methods and results are reported briefly.
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