A semiconductor-based optical amplifier using optically-pumped stimulated scattering
includes an optical signal source (pump) and a wavelength selective coupler. The
coupler is connected to receive an input optical signal and the pump signal and
output the combined signals in a waveguide having a semiconductor core. The intensity
of the pump signal is selected so that stimulated scattering occurs when the pump
signal is propagated in the semiconductor core. Further, the wavelength of the
pump signal is selected so that the stimulated scattering causes emission of a
signal shifted in wavelength to be substantially equal to the wavelength of the
optical input signal. Consequently, the input signal is amplified as it propagates
with the pump signal. The amplifier can be disposed between reflectors to form
a laser.
