中国物理B ›› 2019, Vol. 28 ›› Issue (2): 24212-024212.doi: 10.1088/1674-1056/28/2/024212

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

Li-Wen Sheng(盛立文), De-Xin Ba(巴德欣), Zhi-Wei Lv(吕志伟)   

  1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2018-09-17 修回日期:2018-10-15 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: De-Xin Ba, Zhi-Wei Lv E-mail:dexinba@hit.edu.cn;lvzw@hit.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61605034).

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

Li-Wen Sheng(盛立文), De-Xin Ba(巴德欣), Zhi-Wei Lv(吕志伟)   

  1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
  • Received:2018-09-17 Revised:2018-10-15 Online:2019-02-05 Published:2019-02-05
  • Contact: De-Xin Ba, Zhi-Wei Lv E-mail:dexinba@hit.edu.cn;lvzw@hit.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61605034).

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摘要： 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.

关键词: Brillouin gain spectrum, bandwidth, intensity modulation, low distortion amplification

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.

Key words: Brillouin gain spectrum, bandwidth, intensity modulation, low distortion amplification

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
42.65.-k (Nonlinear optics) 42.65.Yj (Optical parametric oscillators and amplifiers)