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Photon fluctuations in injection lasers and their consequences

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Abstract

This paper presents a theoretical study of photon fluctuations in the light output of semiconductor injection lasers. Statistics on laser photon fluctuations are obtained by simulating the dynamic behavior of the laser through numerical solutions of noise-driven rate equations. Photon probability distributions can be computed just as in a real experiment by counting the frequency of the occurrence of preselected photon numbers in suitable time intervals. It data are collected on simulated free running lasers, the results are useful for predicting photon fluctuations in laser pulses obtained by gating the output of a free running laser with an external modulator. The operation of a pulsed laser can also be simulated by counting photons in the output of a (simulated) laser whose drive current is raised above threshold only during the desired time interval.

© 1985 Optical Society of America

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