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Dynamics in a 1.2 kW quasi-continuous-wave diamond Raman laser with low-coherence pumping (Conference Presentation)
Author(s): Sergei Antipov; Alexander Sabella; Robert J. Williams; Ondrej Kitzler; David J. Spence; Richard P. Mildren

Paper Abstract

A quasi-continuous-wave external cavity diamond Raman laser with 1.2 kW output power was demonstrated using gated pump pulses of 100 µs duration, which was 7 times longer than the time constant for the establishment of steady-state temperature gradients. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained in conversion from a 1.064 µm Nd:YAG pump to a 1.24 µm first Stokes. The transient Stokes behavior from the sharp turn-on was consistent with calculations for the first Stokes build-up time. A brightness enhancement factor of 56 was obtained from the M2 = 15 pump beam. An observed increase in the first Stokes beam quality from M2 = 2.95 to M2 = 1.25 with increase of the Raman laser output power indicated the presence of a steady-state thermal lens in diamond.

Paper Details

Date Published: 13 March 2019
Proc. SPIE 10896, Solid State Lasers XXVIII: Technology and Devices, 1089613 (13 March 2019); doi: 10.1117/12.2509269
Show Author Affiliations
Sergei Antipov, Macquarie Univ. (Australia)
Alexander Sabella, Defence Science and Technology Group (Australia)
Robert J. Williams, Macquarie Univ. (Australia)
Ondrej Kitzler, Macquarie Univ. (Australia)
David J. Spence, Macquarie Univ. (Australia)
Richard P. Mildren, Macquarie Univ. (Australia)

Published in SPIE Proceedings Vol. 10896:
Solid State Lasers XXVIII: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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