1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam

Research output: Contribution to journalArticleResearchpeer-review

Abstract

An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained for conversion from a 1.06 μm pump to the 1.24 μm first Stokes. The pump had an M2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M2 2.95 to M2 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays.

LanguageEnglish
Pages2506-2509
Number of pages4
JournalOptics Letters
Volume44
Issue number10
DOIs
Publication statusPublished - 15 May 2019

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quasi-steady states
Raman lasers
thermal lensing
diamonds
pumps
laser arrays
output
time constant
continuous radiation
lasers
Q factors
amplifiers
diodes
slopes
cavities

Cite this

@article{f19bb6c63b8b4f9abea4a6b343fef249,
title = "1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam",
abstract = "An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83{\%} slope efficiency and a 53{\%} optical-to-optical efficiency were obtained for conversion from a 1.06 μm pump to the 1.24 μm first Stokes. The pump had an M2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M2 2.95 to M2 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays.",
author = "Sergei Antipov and Alexander Sabella and Williams, {Robert J.} and Ondrej Kitzler and Spence, {David J.} and Mildren, {Richard P.}",
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1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam. / Antipov, Sergei; Sabella, Alexander; Williams, Robert J.; Kitzler, Ondrej; Spence, David J.; Mildren, Richard P.

In: Optics Letters, Vol. 44, No. 10, 15.05.2019, p. 2506-2509.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - 1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam

AU - Antipov, Sergei

AU - Sabella, Alexander

AU - Williams, Robert J.

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AU - Spence, David J.

AU - Mildren, Richard P.

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