Abstract
The analysis of quantum fluctuation in semiconductor lasers, started from the sixties with the pioneering work of Haug [1], has brought to the prediction of a large reduction of intensity noise below the standard quantum limit by introducing pump noise suppression, as Yamamoto and coworkers [2] have shown. However most experiments have given prominence of a level of noise reduction definitely lower than predicted by the theory of Yamamoto, raising the question of the existence of noise sources which have not been considered in that theory [3].
© 1998 IEEE
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