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The effects of raman scattering on modulation instabilities in two-core optical fibers

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Abstract

We systematically explore the effects of Raman scattering (RS) on modulation instabilities (MIs) in nonlinear two-core optical fibers (TCFs) with the symmetric and antisymmetric continuous wave (CW) states. The main contribution of this paper is that the analytical gain spectra with RS effects are given explicitly for both anomalous and normal dispersion regimes. Our results show that the MI spectra with RS effects can be significantly changed. First of all, MI arises for any total power in both normal and anomalous dispersion regimes. Secondly, MI gain can be significantly enhanced especially at large values of perturbation frequencies. In addition, the modulation frequency generating MI expands from the finite frequency domain without RS effects to the infinite frequency domain. The MI analysis is finally verified numerically with wave propagation method.

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Acknowledgement

Partial financial support has been provided by the National Natural Science Foundation of China under Grant Nos. 11605090 and 11447113, and the Innovation and Entrepreneurship Training Program for College Students in NUIST under Grant No. 1214071701133.

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  1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China

    Tingting Sun, Jinhua Li, Shixin Pei, Yunyun Chen, Zhaolou Cao & Fenglin Xian

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  1. Tingting Sun
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  2. Jinhua Li
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Correspondence to Jinhua Li.

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Sun, T., Li, J., Pei, S. et al. The effects of raman scattering on modulation instabilities in two-core optical fibers. Opt Quant Electron 53, 231 (2021). https://doi.org/10.1007/s11082-021-02824-z

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