Intensity self-pulsations in (GaAl)As injection lasers operating in an external cavity

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Abstract
We present an experimental and theoretical study of a self‐pulsing (GaAl)As injection laser operating in an external cavity. We have observed suppression of the self‐pulsations when the external cavity is in the range 6<L<10 cm. Suppression of self‐pulsations can also be obtained by using a multimode graded index optical fiber as the external resonator. These results can be explained by a model which includes the effects of an external cavity and electron trapping. For long cavity lengths, the self‐pulsation frequency locks to an external cavity harmonic with no significant quenching, as observed in some earlier experiments.