Distortion of high-power chirped Gaussian pulse in single-mode fiber

Abstract

Abstract:

Based on nonlinear Schrödinger equation in optical fiber, the factor of distortion of pulse (DIS) is defined to evaluate the distortion of the pulse. The relation among the DIS, critical length of propagation, critical power and initial chirp of the pulse are numerically simulated and analyzed when only dispersion and self-phased modulation is considered. The results show that the distortion of positive chirped pulse is less than that of negative chirped pulse for the given peak power. For the given initial chirp, the critical length of the pulse decreases with the increasing of the peak power of the input pulse, and the critical length of different initial chirp pulses coincides along with increasing of the peak power of the input pulse. When the length of propagation is fixed, critical power is linear with initial chirp, meanwhile the fluctuation of the chirp have more effect on the positive chirped pulse.

Key words: nonlinear optics, factor of distortion, broadening factor, chirped Gauss pulse

CLC Number:

TN253

FU Huai-duo, XU Li-xin，WANG An-ting. Distortion of high-power chirped Gaussian pulse in single-mode fiber[J]. J4, 2011, 28(3): 357-361.

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