200 mW at 488 nm From a ppMgO:LN Ridge Waveguide by Frequency Doubling of a Laser Diode Module

Published in:
IEEE Photonics Technol. Lett., vol. 22, no. 17, pp. 1282-1284 (2010).
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Abstract:
We report on second-harmonic generation in a single-pass bench top configuration using a MgO-doped periodically poled LiNbO₃ ridge waveguide (RW) and a hybrid integrated master oscillator power amplifier laser module at 976 nm. A coupling efficiency into the crystal RW of 66% was realized and 200 mW of continuous-wave radiation at 488 nm at room temperature were reached. A conversion efficiency of 43% with regard to the coupled near-infrared radiation was obtained. The experimental results agreed well with simulations including material inhomogeneities, higher optical absorption, and thermal effects.

Index Terms:
Frequency conversion, nonlinear optics, optical waveguides, second-harmonic generation (SHG), semiconductor laser.

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