A microchip cavity including a half-monolithic Nd:YAG– KNbO<sub>3</sub> chip and a second KNbO<sub>3</sub> crystal is presented. An output power of up to 30 mW at 473 nm pumped by a single stripe 1-W at 808-nm diode is achieved. The laser can be operated in either single-longitudinal or multilongitudinal mode by rotation of the second frequency-doubling crystal to 0° or 90° from the first one. The cw output noise is less than 2% for both cases.
© 2000 Optical Society of America
Volker Gaebler, Baining Liu, Hans Joachim Eichler, Zhiguo Zhang, and Dezhong Shen, "Efficient blue cw Nd:YAG microchip laser with two intracavity frequency doublers," Opt. Lett. 25, 1343-1345 (2000)