NASA NTRS · 19960025073
Quantum Noise in Laser Diodes
Abstract
We have investigated the intensity noise of single mode laser diodes, either free-running or using different types of line narrowing techniques at room temperature. We have measured an intensity squeezing of 1.2 dB with grating-extended cavity lasers and 1.4 dB with injection locked lasers (respectively 1.6 dB and 2.3 dB inferred at the laser output). We have observed that the intensity noise of a free-running nominally single mode laser diode results from a cancellation effect between large anti-correlated fluctuations of the main mode and of weak longitudinal side modes. Reducing the side modes by line narrowing techniques results in intensity squeezing.
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Giacobino, E., Marin, F., Bramati, A., Jost, V., Poizat, J. Ph., Roch, J.-F., Grangier, P., Zhang, T.-C.. 1996-01-01. Quantum Noise in Laser Diodes. https://ntrs.nasa.gov/citations/19960025073
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