Output power saturation characteristics of the CW- operated semiconductor Raman laser

摘要

The intensity noise of a CW-operated semiconductor Raman laser with a tapered waveguide structure with GaP core and Al_xGa_1-xP cladding layers has been measured and it has been found that the noise spectral intensity in the frequency range 10Hz-100kHz was reduced to 34dB below that of the incident pump light under saturation conditions. This effect has been interpreted as coupling between the pump light, the first Stokes light and the second Stokes light, assuming a very small contribution of nonlinear absorption.