Effects of walk-off on cross-phase modulation induced modulation instability in an optical fibre with high-order dispersion |
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Authors: | Zhong Xian-Qiong and Xiang An-Ping |
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Institution: | Department of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China |
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Abstract: | This paper investigates the effects of walk-off among optical pulses
on cross-phase modulation induced modulation instability in the
normal dispersion region of an optical fibre with high-order
dispersion. The results indicate that, in the case of high-order
dispersion, the walk-off effect takes on new characteristics and will
influence considerably the shape, position and especially the number
of the spectral regions of the gain spectra of modulation
instability.
Not only the group-velocity mismatch, but also the difference
of the third-order dispersion of two optical waves will alter the gain
spectra of modulation instability but in different ways. Depending on the
values of the walk-off parameters, the number of the spectral regions may
increase from two to at most four, and the spectral shape and position may
change too. |
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Keywords: | modulation
instability cross-phase modulation walk-off effect the difference
ofthe third-order dispersion |
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