Optimization of the frequency response of a semiconductor-optical-amplifier/fiber-Bragg-grating wavelength converter

Summary form only given. Wavelength converters that employ semiconductor optical amplifiers (SOAs) have a finite frequency response that leads to a pattern-dependent response at high bit rates. We recently showed that filtering the corrupted data with the sharp edge of a fiber-grating filter eliminates pattern dependence. Here, we measure the modulation transfer function of the SOA/fiber-grating device and determine the optimum filtering condition for nonreturn-to-zero data in the small-signal regime.