Frequency doubling of near-infrared radiation enhanced by a multi-pass cavity for the second-harmonic wave
D. Jedrzejczyk, R. Güther, K. Paschke, G. Erbert
Published in:
Proc. SPIE 9347, Photonics West, San Francisco, USA, Feb. 07-12, 934709 (2015).
Abstract:
In this work, we demonstrate frequency doubling of a DBR tapered diode laser operating around 1064 nm in a nonlinear bulk crystal enhanced by a multi-pass cavity resonant for the generated green light. This novel approach to generate visible laser radiation is characterized by an increased conversion efficiency in comparison to a single-pass configuration. Through the proper choice of the standing wave plane-parallel cavity parameters, the introduced concept requires no impedance matching and frequency locking. A maximum second-harmonic power of 1 W at a conversion efficiency of 20 % is achieved.
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Keywords:
second-harmonic generation (SHG), frequency doubling, cavity enhanced SHG, multiple-pass SHG, tapered diode laser.
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