Spectral and RIN properties of a single-frequency Raman fiber amplifier co-pumped by ASE source

Spectral and relative intensity noise (RIN) characteristics of a single-frequency Raman fiber amplifier co-pumped by amplified spontaneous emission (ASE) sources are investigated experimentally. Due to the relatively lower intensity noise of ASE sources compared to usual fiber laser pumps, the full...

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Bibliographic Details
Published in:Optics express 2021-05, Vol.29 (10), p.15764-15771
Main Authors: Cheng, Xin, Cui, Shuzhen, Zeng, Xin, Zhou, Jiaqi, Feng, Yan
Format: Article
Language:English
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Summary:Spectral and relative intensity noise (RIN) characteristics of a single-frequency Raman fiber amplifier co-pumped by amplified spontaneous emission (ASE) sources are investigated experimentally. Due to the relatively lower intensity noise of ASE sources compared to usual fiber laser pumps, the full width at half maximum (FWHM) linewidth of the signal laser increases negligibly. But there is significant increase in RIN and spectral wings due to the noise transfer at high frequency from the ASE source during the Raman amplification. The deterioration can be suppressed to some extent with ASE of broader linewidth, which has lower intensity noise.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.424063