Abstract
Intensity fluctuations of semiconductor lasers due to optical feedback were theoretically analyzed by using modified rate equations which include a refractive index fluctuation. Photon density fluctuations were simulated, and their Fourier transformed spectra were obtained and analyzed. Optical beating of the external cavity modes, which generates the fluctuation of the refractive indices of the semiconductor materials, is proved to be an origin of the reflection noise.
© 1989 Optical Society of America
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