Abstract
A single-longitudinal-mode (SLM) Neodymiun-doped Yttrium Aluminium Garnet (Nd:YAG) laser at 1123 nm was first demonstrated with a twisted-mode (TM) cavity. By eliminating the spatial hole burning phenomenon, a stable SLM 1123 nm laser output was obtained. An efficient TM cavity was designed based on the Brewster plate with high reflection under s-polarization radiation. At an incident pump power of 7.65 W, the maximum output power of 689 mW was obtained. The corresponding optical conversion efficiency was about 9%. The center wavelength was 1122.58 nm and the line-width was <140 MHz.
Highlights
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The TM cavity consisted of two cavity mirrors, two quarter-wave plates (QWPs) and a polarization beamsplitter plate (PBP)
The output power was measured by a power meter (PM10, Molectron, America) connected to a Molectron device (EPM2000, Molectron, America)
Summary
Citation: Liu, Y.; Zhang, S.; Cong, Z.; Men, S.; Guan, C.; Xie, Y.; Liu, Z.Single-Longitudinal-Mode Laser at 1123 nm Based on a Twisted-ModeCavity. Crystals 2021, 11, 58. https://doi.org/10.3390/cryst11010058Received: 18 December 2020Accepted: 12 January 2021Published: 13 January 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/).
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