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Analysis of basic four-wave mixing characteristics in a semiconductor optical amplifier by the finite-difference beam propagation method

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3 Author(s)
Das, N.K. ; Fac. of Eng., Yamagata Univ., Yonezawa, Japan ; Yamayoshi, Y. ; Kawaguchi, Hitoshi

We have numerically analyzed nondegenerate four-wave mixing (FWM) among short optical pulses in a semiconductor optical amplifier (SOA) by the finite-difference beam propagation method (FD-BPM). We used the nonlinear propagation equation taking into account gain spectrum dynamic gain saturation which depends on carrier depression, carrier heating, and spectral hole-burning, group velocity dispersion, self-phase modulation, and two-photon absorption. To analyze FWM in an SOA, the evolution in time and spectral domain of two input optical pulses with different frequencies during propagation was calculated. From this simulation, it has become clear that the method me used here is a very useful technique for simulating FWM characteristics in SOA's. We also found that the wavelength dependence of the gain is crucial if the detuning is larger than 1 THz.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:36 ,  Issue: 10 )