Investigating diamond Raman lasers at the 100W level using quasi-continuous-wave pumping

Robert J. Williams*, Ondrej Kitzler, Aaron McKay, Richard P. Mildren

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Citations (Scopus)
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Abstract

Quasi-cw pumping is used to investigate the high-power characteristics of cw beam conversion in diamond Raman lasers (DRLs). We show that thermal gradients establish in DRLs at approximately 50 μs for a 100 μm pump beam diameter, and thus that the steady state for cw operation can be reached within the 100-300 μs pulse duration of conventional quasi-cw pump laser technology. Using this approach, a steady-state on-time output power of 108 W was obtained from an external-cavity DRL during 250 μs pulses with 34% conversion efficiency. No thermal lens in the diamond was evident, showing excellent prospects for further power scaling.

Original languageEnglish
Pages (from-to)4152-4155
Number of pages4
JournalOptics Letters
Volume39
Issue number14
DOIs
Publication statusPublished - 15 Jul 2014

Bibliographical note

This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-14-4152. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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