Linewidth narrowing in free-space-running diamond Brillouin lasers

Duo Jin; Zhenxu Bai; Zhongan Zhao; Yifu Chen; Wenqiang Fan; Yulei Wang; Richard P. Mildren; Zhiwei Lü

doi:10.1017/hpl.2023.48

Linewidth narrowing in free-space-running diamond Brillouin lasers

Duo Jin, Zhenxu Bai^*, Zhongan Zhao, Yifu Chen, Wenqiang Fan, Yulei Wang^*, Richard P. Mildren, Zhiwei Lü^*

^*Corresponding author for this work

MQ Photonics Research Centre

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

9 Citations (Scopus)

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Abstract

This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously. The results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the system. Experimentally, a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%, which is nearly 2.5 times compressed compared with the linewidth of the pump (7.36 kHz). In addition, the theorical analysis shows that at a pump power of 60 W and a coupling mirror reflectivity of 96%, a Stokes output with a linewidth of 1.6 kHz and up to 80% optical conversion efficiency can be achieved by reducing the insertion loss of the intracavity. This study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.

Original language	English
Article number	e47
Pages (from-to)	1-8
Number of pages	8
Journal	High Power Laser Science and Engineering
Volume	11
DOIs	https://doi.org/10.1017/hpl.2023.48
Publication status	Published - 6 Jun 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

high power
narrow linewidth
single-frequency laser
stimulated Brillouin scattering

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10.1017/hpl.2023.48Licence: CC BY

Publisher version (open access)Final published version, 1.82 MBLicence: CC BY

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title = "Linewidth narrowing in free-space-running diamond Brillouin lasers",

abstract = "This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously. The results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the system. Experimentally, a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%, which is nearly 2.5 times compressed compared with the linewidth of the pump (7.36 kHz). In addition, the theorical analysis shows that at a pump power of 60 W and a coupling mirror reflectivity of 96%, a Stokes output with a linewidth of 1.6 kHz and up to 80% optical conversion efficiency can be achieved by reducing the insertion loss of the intracavity. This study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.",

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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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doi = "10.1017/hpl.2023.48",

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T1 - Linewidth narrowing in free-space-running diamond Brillouin lasers

AU - Jin, Duo

AU - Bai, Zhenxu

AU - Zhao, Zhongan

AU - Chen, Yifu

AU - Fan, Wenqiang

AU - Wang, Yulei

AU - Mildren, Richard P.

AU - Lü, Zhiwei

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 - 2023/6/6

Y1 - 2023/6/6

N2 - This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously. The results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the system. Experimentally, a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%, which is nearly 2.5 times compressed compared with the linewidth of the pump (7.36 kHz). In addition, the theorical analysis shows that at a pump power of 60 W and a coupling mirror reflectivity of 96%, a Stokes output with a linewidth of 1.6 kHz and up to 80% optical conversion efficiency can be achieved by reducing the insertion loss of the intracavity. This study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.

AB - This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously. The results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the system. Experimentally, a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%, which is nearly 2.5 times compressed compared with the linewidth of the pump (7.36 kHz). In addition, the theorical analysis shows that at a pump power of 60 W and a coupling mirror reflectivity of 96%, a Stokes output with a linewidth of 1.6 kHz and up to 80% optical conversion efficiency can be achieved by reducing the insertion loss of the intracavity. This study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.

KW - high power

KW - narrow linewidth

KW - single-frequency laser

KW - stimulated Brillouin scattering

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JO - High Power Laser Science and Engineering

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ER -

Linewidth narrowing in free-space-running diamond Brillouin lasers

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