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Physics Letters A

Observation of quantum-phase and quantum-amplitude noise for a laser below and above threshold

Harald Gerhardt, H. Welling, A. Güttner

Published Jul 1, 1972• 4 citations
Publisher
DOI
10.1016/0375-9601(72)90650-0

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A quantum-beat laser without inversion is proposed for producing two-mode suqeezing. Using the dressed-atom-dressed-mode approach, the master equation is derived and the variances in the sum mode intensity and in the relative amplitude and phase are calculated. When the laser is operated well above threshold, the intensity fluctuations in the sum mode are reduced below the shot noise limit with an optimum Mandel parameter of -0.5. At the same time, the fluctuations in the relative amplitude and phase are retained at their vaccum noise levels.