Generation of more than 300 mW diffraction-limited light at 405 nm by second-harmonic generation of a tapered diode laser with external cavity feedback
O.B. Jensena, J. Holma B. Sumpfb, G. Erbertb, P.E. Andersena, and P.M. Petersena
Published in:
Proc. SPIE, vol. 6455, no. 645503 (2007).
Abstract:
We have constructed a blue laser source consisting of a single-frequency tapered diode laser with external cavity feedback that is frequency doubled by a quasi-phase matched KTP (PPKTP) in a bowtie ring cavity and extract more than 360 mW of power at 405 nm. The conversion efficiency from fundamental laser power to second harmonic power is 35%, while it is 64% from coupled fundamental power to extracted blue light. Thermal effects and gray tracking set an upper limit on the amount of generated blue light.
a Risø National Laboratory, Optics and Plasma Research Department, Frederiksborgvej 399, Dk-4000 Roskilde, Denmark
b Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
Keywords:
Second harmonic generation, external cavity diode lasers, PPKTP, external cavity second harmonic generation, tapered diode laser.
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