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

Robert J. Williams; Ondrej Kitzler; Aaron McKay; Richard P. Mildren

doi:10.1364/OL.39.004152

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 journal › Article › peer-review

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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 language	English
Pages (from-to)	4152-4155
Number of pages	4
Journal	Optics Letters
Volume	39
Issue number	14
DOIs	https://doi.org/10.1364/OL.39.004152
Publication status	Published - 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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title = "Investigating diamond Raman lasers at the 100W level using quasi-continuous-wave pumping",

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.",

author = "Williams, {Robert J.} and Ondrej Kitzler and Aaron McKay and Mildren, {Richard P.}",

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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AB - 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.

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

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