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

Abstract

, P. M. (2007). 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. In P. E. Powers (Ed.), Proceedings of SPIE (Vol. 6455 ABSTRACTWe 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.

An efficient, tunable, and robust source of narrow-band photon pairs at the 87Rb D1 line

“…However, on longer timescales changes of the triple resonance frequencies that could not be compensated by changing the piezo voltage and temperature occurred. We attribute these changes to pump-induced gray tracking 46,47 that affects the cavity modes. When the tuning range is thus exhausted a major readjustment is required to bring the source back within range of the desired atomic transition.…”