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Impact of higher-order dispersion in the modulational instability spectrum of a relaxing coupled saturable media

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Abstract

A theoretical analysis of modulational instability (MI) of optical pulses propagating near the zero dispersion wavelength of a lossless fibre with the effect of delayed saturable nonlinear response is presented. We calculate the exact dispersion relation with the effect of higher dispersion for the harmonic perturbation. We analysed the impact of fourth-order dispersion effects in the MI spectrum. We examine the possibility of MI in both dispersion regimes, regardless of the sign of the group velocity dispersion.

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Acknowledgements

KP wishes to thank the DST, DAE–BRNS and UGC, Government of India, for the financial support through major projects.

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Authors and Affiliations

  1. Department of Physics, Pondicherry University, Puducherry, 605 014, India

    K NITHYANANDAN, T UTHAYAKUMAR & K PORSEZIAN

  2. School of Electrical and Electronics Engineering, SASTRA University, Thanjavur, 613 401, India

    R V J RAJA

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  1. K NITHYANANDAN
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  2. R V J RAJA
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  3. T UTHAYAKUMAR
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  4. K PORSEZIAN
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Correspondence to K NITHYANANDAN.

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NITHYANANDAN, K., RAJA, R.V.J., UTHAYAKUMAR, T. et al. Impact of higher-order dispersion in the modulational instability spectrum of a relaxing coupled saturable media. Pramana - J Phys 82, 339–345 (2014). https://doi.org/10.1007/s12043-014-0687-8

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  • DOI: https://doi.org/10.1007/s12043-014-0687-8

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