High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Yuxuan Liu; Chengjie Zhu; Yuxiang Sun; Richard P. Mildren; Zhenxu Bai; Baitao Zhang; Weibiao Chen; Dijun Chen; Muye Li; Xuezong Yang; Yan Feng

doi:10.1017/hpl.2023.67

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Yuxuan Liu, Chengjie Zhu, Yuxiang Sun, Richard P. Mildren, Zhenxu Bai, Baitao Zhang, Weibiao Chen, Dijun Chen, Muye Li^*, Xuezong Yang^*, Yan Feng

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

Original language	English
Article number	e67
Pages (from-to)	1-6
Number of pages	6
Journal	High Power Laser Science and Engineering
Volume	11
DOIs	https://doi.org/10.1017/hpl.2023.67
Publication status	Published - 15 Aug 2023

Bibliographical note

© The Author(s), 2023. Published by Cambridge University Press in association with Chinese Laser Press. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

delay self-heterodyning
diamond Raman laser
linewidth
single-longitudinal mode
stimulated Brillouin scattering

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10.1017/hpl.2023.67Licence: CC BY

Publisher version (open access)Final published version, 1.76 MBLicence: CC BY

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title = "High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering",

abstract = "A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.",

keywords = "delay self-heterodyning, diamond Raman laser, linewidth, single-longitudinal mode, stimulated Brillouin scattering",

author = "Yuxuan Liu and Chengjie Zhu and Yuxiang Sun and Mildren, {Richard P.} and Zhenxu Bai and Baitao Zhang and Weibiao Chen and Dijun Chen and Muye Li and Xuezong Yang and Yan Feng",

note = "{\textcopyright} The Author(s), 2023. Published by Cambridge University Press in association with Chinese Laser Press. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

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month = aug,

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doi = "10.1017/hpl.2023.67",

language = "English",

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TY - JOUR

T1 - High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

AU - Liu, Yuxuan

AU - Zhu, Chengjie

AU - Sun, Yuxiang

AU - Mildren, Richard P.

AU - Bai, Zhenxu

AU - Zhang, Baitao

AU - Chen, Weibiao

AU - Chen, Dijun

AU - Li, Muye

AU - Yang, Xuezong

AU - Feng, Yan

N1 - © The Author(s), 2023. Published by Cambridge University Press in association with Chinese Laser Press. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2023/8/15

Y1 - 2023/8/15

N2 - A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

AB - A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

KW - delay self-heterodyning

KW - diamond Raman laser

KW - linewidth

KW - single-longitudinal mode

KW - stimulated Brillouin scattering

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JO - High Power Laser Science and Engineering

JF - High Power Laser Science and Engineering

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ER -

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

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