Analysis of FWM wavelength conversion in a SOA integrated DFB laser using coupled-wave approach and FD-BPM method

摘要

In this paper we have numerically analyzed terahertz-range wavelength conversion using nondegenerate four wave mixing (NDFWM) in a SOA integrated DFB laser (exper-iments reported both in MIT electronics and Fujitsu research laboratories). For analyzing semiconductor optical amplifier (SOA), we use finite-difference beam propagation method (FD-BPM) based on modified nonlinear Schr¨ odinger equation and for distributed feedback (DFB) laser we use coupled-wave approach. We investigated wavelength conversion up to 4THz probe-pump detuning with a conversion efficiency -5dB in 1THz probe-pump detuning for a SOA integrated quantum-well λ/4-shifted DFB laser. We have successfully estimated for the first time FWM conversion efficiency in the tested device. This results compared with experiment measurements demonstrates suitable compatibility.