中国物理B ›› 2017, Vol. 26 ›› Issue (6): 64206-064206.doi: 10.1088/1674-1056/26/6/064206

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

Optical pulse evolution in the presence of a probe light in CW-pumped nonlinear fiber

Wei Chen(陈伟), Xue-Liang Zhang(张学亮), Xiao-Yang Hu(胡晓阳), Zhang-Qi Song(宋章启), Zhou Meng(孟洲)   

  1. Academy of Ocean Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2016-12-20 修回日期:2017-02-13 出版日期:2017-06-05 发布日期:2017-06-05
  • 通讯作者: Wei Chen E-mail:kevinkobegames@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61505258) and the Scientific Research Project of National University of Defense Technology (Grant No. JC15-11-02).

Optical pulse evolution in the presence of a probe light in CW-pumped nonlinear fiber

Wei Chen(陈伟), Xue-Liang Zhang(张学亮), Xiao-Yang Hu(胡晓阳), Zhang-Qi Song(宋章启), Zhou Meng(孟洲)   

  1. Academy of Ocean Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2016-12-20 Revised:2017-02-13 Online:2017-06-05 Published:2017-06-05
  • Contact: Wei Chen E-mail:kevinkobegames@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61505258) and the Scientific Research Project of National University of Defense Technology (Grant No. JC15-11-02).

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摘要： We investigate theoretically and numerically the evolutions of optical pulses in the time domain due to modulation instability (MI), where CW pump accompanied with a probe is used as the input of nonlinear fiber. As the fiber length increases, we show that it exhibits beat frequency between the pump and the probe first when the probe lies outside the MI resonance region, and then gradually transforms into a pulse train resulting from spontaneous MI rather than induced MI. However, the regular pulse train is easier to generate in the whole fiber if the probe exists in MI resonance region, and the period of the pulse train is inversely proportional to the frequency spacing between the pump and the probe. It is emphasized that the pulse period can be adjusted only when the probe is in MI resonance region. The numerical simulations are in agreement with the theoretical results. The obtained results are guidable for generating and manipulating the optical pulse train in the fiber.

关键词: modulation instability, pulse, fiber, resonance region

Abstract: We investigate theoretically and numerically the evolutions of optical pulses in the time domain due to modulation instability (MI), where CW pump accompanied with a probe is used as the input of nonlinear fiber. As the fiber length increases, we show that it exhibits beat frequency between the pump and the probe first when the probe lies outside the MI resonance region, and then gradually transforms into a pulse train resulting from spontaneous MI rather than induced MI. However, the regular pulse train is easier to generate in the whole fiber if the probe exists in MI resonance region, and the period of the pulse train is inversely proportional to the frequency spacing between the pump and the probe. It is emphasized that the pulse period can be adjusted only when the probe is in MI resonance region. The numerical simulations are in agreement with the theoretical results. The obtained results are guidable for generating and manipulating the optical pulse train in the fiber.

Key words: modulation instability, pulse, fiber, resonance region

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics) 42.65.Tg (Optical solitons; nonlinear guided waves) 42.81.Dp (Propagation, scattering, and losses; solitons)