302 W quasi-continuous cascaded diamond Raman laser at 1.5 microns with large brightness enhancement

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report a second Stokes diamond Raman laser at 1.49 μm capable of high power and large-scale-factor brightness enhancement. Using a quasi-continuous 1.06 μm pump of power 823 W (0.85% duty cycle) and M2 up to 6.4, a maximum output power of 302 W was obtained with an M2 = 1.1 providing an overall brightness enhancement factor of 6.0. The pulse length of ~210 μs was selected to ensure operation was representative of steady-state continuous lasing conditions in the diamond bulk. Accompanying theoretical calculations indicate that even more strongly aberrated pumps may be used to efficiently generate high beam quality output and with higher brightness enhancement factors. This diamond-based beam conversion technique addresses needs for high brightness and efficient eye-safe sources using low-brightness 1 μm pumps and reveals a widely-applicable route to practical high brightness lasers of increased wavelength range.

LanguageEnglish
Pages19797-19803
Number of pages7
JournalOptics Express
Volume26
Issue number16
DOIs
Publication statusPublished - 6 Aug 2018

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Raman lasers
brightness
diamonds
augmentation
pumps
output
lasing
routes
cycles
pulses
wavelengths
lasers

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@article{28289af4ae514e8c8b3a88aa380997a3,
title = "302 W quasi-continuous cascaded diamond Raman laser at 1.5 microns with large brightness enhancement",
abstract = "We report a second Stokes diamond Raman laser at 1.49 μm capable of high power and large-scale-factor brightness enhancement. Using a quasi-continuous 1.06 μm pump of power 823 W (0.85{\%} duty cycle) and M2 up to 6.4, a maximum output power of 302 W was obtained with an M2 = 1.1 providing an overall brightness enhancement factor of 6.0. The pulse length of ~210 μs was selected to ensure operation was representative of steady-state continuous lasing conditions in the diamond bulk. Accompanying theoretical calculations indicate that even more strongly aberrated pumps may be used to efficiently generate high beam quality output and with higher brightness enhancement factors. This diamond-based beam conversion technique addresses needs for high brightness and efficient eye-safe sources using low-brightness 1 μm pumps and reveals a widely-applicable route to practical high brightness lasers of increased wavelength range.",
author = "Zhenxu Bai and Williams, {Robert J.} and Ondrej Kitzler and Soumya Sarang and Spence, {David J.} and Mildren, {Richard P.}",
year = "2018",
month = "8",
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doi = "10.1364/OE.26.019797",
language = "English",
volume = "26",
pages = "19797--19803",
journal = "Optics Express",
issn = "1094-4087",
publisher = "OPTICAL SOC AMER",
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302 W quasi-continuous cascaded diamond Raman laser at 1.5 microns with large brightness enhancement. / Bai, Zhenxu; Williams, Robert J.; Kitzler, Ondrej; Sarang, Soumya; Spence, David J.; Mildren, Richard P.

In: Optics Express, Vol. 26, No. 16, 06.08.2018, p. 19797-19803.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AU - Bai,Zhenxu

AU - Williams,Robert J.

AU - Kitzler,Ondrej

AU - Sarang,Soumya

AU - Spence,David J.

AU - Mildren,Richard P.

PY - 2018/8/6

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AB - We report a second Stokes diamond Raman laser at 1.49 μm capable of high power and large-scale-factor brightness enhancement. Using a quasi-continuous 1.06 μm pump of power 823 W (0.85% duty cycle) and M2 up to 6.4, a maximum output power of 302 W was obtained with an M2 = 1.1 providing an overall brightness enhancement factor of 6.0. The pulse length of ~210 μs was selected to ensure operation was representative of steady-state continuous lasing conditions in the diamond bulk. Accompanying theoretical calculations indicate that even more strongly aberrated pumps may be used to efficiently generate high beam quality output and with higher brightness enhancement factors. This diamond-based beam conversion technique addresses needs for high brightness and efficient eye-safe sources using low-brightness 1 μm pumps and reveals a widely-applicable route to practical high brightness lasers of increased wavelength range.

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