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 |
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Article number | e47 |
Pages (from-to) | 1-8 |
Number of pages | 8 |
Journal | High Power Laser Science and Engineering |
Volume | 11 |
DOIs | |
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