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Published April 26, 1995 | Published
Book Section - Chapter Open

Generation of amplitude-squeezed light from a pump-suppressed semiconductor laser with dispersive optical feedback

Abstract

Amplitude-squeezed states are generated from a room-temperature semiconductor laser using a combination of pump suppression and dispersive optical feedback. The laser amplitude noise is found to be sensitive to extremely weak feedback levels, of the order of 10^(-8) of the output power. a reduction of the noise from 2% below the standard quantum limit (SQL) under free-running conditions to 19% below the SQL under optimal feedback conditions is obtained. A single mode theory is presented but is found to be inadequate in explaining the measured dependence of the noise reduction on the feedback power. A multimode theory including asymmetrical cross-mode nonlinear gain is proposed to explain this discrepancy.

Additional Information

© 1995 Society of Photo-Optical Instrumentation Engineers (SPIE).

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