Modeling of a second harmonic spectrum in passive phase demodulation

Autor:	Bowen Ruan, Xin Zeng, Yan Feng
Rok vydání:	2023
Předmět:	Electrical and Electronic Engineering Engineering (miscellaneous) Atomic and Molecular Physics and Optics
Zdroj:	Applied Optics. 62:2809
ISSN:	2155-3165 1559-128X
DOI:	10.1364/ao.485183
Popis:	Spectral compression by passive phase demodulation provides an effective way to obtain a high-power single-frequency second harmonic (SH) laser. In this method, a single-frequency laser is broadened by (0, π) binary phase modulation for stimulated Brillouin scattering suppression in a high-power fiber amplifier and compressed to single frequency after frequency doubling. The effectiveness of compressing is determined by the properties of the phase modulation system, including the modulation depth, frequency response of modulation system, and modulation signal noise. A numerical model is developed to simulate the influence of these factors on the SH spectrum. The simulation results reproduce the experimental observation well, including the reduction of the compression rate at higher-frequency phase modulation, emergence of spectral sidebands and pedestal.
Databáze:	OpenAIRE
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