Longitudinal-Mode stabilization in semiconductor lasers with wavelength-selective external feedback.
01 January 1986
In optical communication systems operating near the zero-dispersion wavelength of the fiber, the wavelength of semiconductor lasers should remain stabilized to minimize the effects of fiber dispersion. We analyze theoretically the requirements for the mode stablization when external dispersive feedback is used to select a longitudinal mode. By a suitable choice of laser parameters, a multimode laser can remain stablized in the vicinity of the feedback-selected wavelength even when the free-running wavelength has drifted by more than 10 nm.