Characterization of the sideband noise of a cavity-enhanced second harmonic generator

Weiquan Wang; Yong Shen; Xiaokang Tang; Xiang Zhang; Yongzhuang Zhou; Hongxin Zou

doi:10.1117/12.3031626

18 July 2024 Characterization of the sideband noise of a cavity-enhanced second harmonic generator

Weiquan Wang, Yong Shen, Xiaokang Tang, Xiang Zhang, Yongzhuang Zhou, Hongxin Zou

Proceedings Volume 13179, International Conference on Optics and Machine Vision (ICOMV 2024); 131790H (2024) https://doi.org/10.1117/12.3031626
Event: International Conference on Optics and Machine Vision (ICOMV 2024), 2024, Nanchang, China

Abstract

Narrow linewidth ultraviolet (UV) lasers are widely used in high-resolution spectroscopy. Due to the limitation of gain materials, UV lasers are usually generated via optical nonlinear process. In this paper, the noise characteristics of UV lasers generated in a cavity-enhanced second harmonic generator (SHG) is studied both theoretically and experimentally. Evolution of the laser noise is calculated with the noise ellipse rotation model. Due to the interaction with the optical cavity, noise of the two quadratures of the input field are intercoupled. Therefore, the power spectrum density (PSD) of the generated second harmonic can significantly deviate from that of the fundamental. This effect is verified by measuring the PSD of a 388 nm SHG pumped by a common diode laser. The results in this paper give an insight into the research of noise suppression for UV lasers

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Weiquan Wang, Yong Shen, Xiaokang Tang, Xiang Zhang, Yongzhuang Zhou, and Hongxin Zou "Characterization of the sideband noise of a cavity-enhanced second harmonic generator", Proc. SPIE 13179, International Conference on Optics and Machine Vision (ICOMV 2024), 131790H (18 July 2024); https://doi.org/10.1117/12.3031626

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