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Quantum Electronics and Laser Science Conference

Laser with injected squeezed vacuum: phase-diffusion rate, linewidth, and intensity fluctuations

Perry R. Rice, Xiaosong Yin, James Walden, Julio R. Gea-Banacloche, Leno M. Pedrotti

Published May 10, 1992• 0 citations
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It is predicted that a laser's phase-diffusion rate (its Schawlow-Townes linewidth) may be reduced by as much as one-half when the laser is coupled out to ``squeezed vacuum'' as opposed to ordinary vacuum. The effect is important because it is directly related to spontaneous emission in a squeezed vacuum. It shows that a part of spontaneous emission is due to amplified zero-point noise and that, therefore, in a squeezed field the random phases of the spontaneously emitted photons are no longer uniformly distributed.