High-gain and low-distortion Brillouin amplification based on pump multi-frequency intensity modulation

doi:10.1088/1674-1056/28/2/024212

Abstract Using a pump with a multi-line spectrum to broaden the Brillouin gain bandwidth is an effective way to achieve low-distortion amplification with high gain. Here, we theoretically and experimentally investigate the generation of a broadband Brillouin gain spectrum based on multi-frequency intensity modulation in an optical fiber. The arbitrary bandwidth of the Brillouin gain spectrum of stimulated Brillouin scattering (SBS) can be obtained as expected. In our experiment, a broadband Brillouin gain spectrum with a bandwidth of about 200 MHz is demonstrated. We also achieve a low-distortion amplification of a weak signal, whose maximum magnification is 65 dB for a -68-dBm input power signal.

Keywords: Brillouin gain spectrum bandwidth intensity modulation low distortion amplification

Received: 17 September 2018
Revised: 15 October 2018
Accepted manuscript online:

PACS:	42.65.Es	(Stimulated Brillouin and Rayleigh scattering)
	42.65.-k	(Nonlinear optics)
	42.65.Yj	(Optical parametric oscillators and amplifiers)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61605034).

Corresponding Authors: De-Xin Ba, Zhi-Wei Lv
E-mail: dexinba@hit.edu.cn;lvzw@hit.edu.cn

Cite this article:

Li-Wen Sheng(盛立文), De-Xin Ba(巴德欣), Zhi-Wei Lv(吕志伟) High-gain and low-distortion Brillouin amplification based on pump multi-frequency intensity modulation 2019 Chin. Phys. B 28 024212

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High-gain and low-distortion Brillouin amplification based on pump multi-frequency intensity modulation

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