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Critical Petermann K Factor for Intensity Noise Squeezing

Abstract : We investigate the impact of the Petermann-excess-noise factor K≥1 on the possibility of intensity noise squeezing of laser light below the standard quantum limit. Using an N-mode model, we show that squeezing is limited to a floor level of 2(k-1) times the shot noise limit. Thus, even a modest Petermann factor significantly impedes squeezing, which becomes impossible when K ≥1.5. This appears as a serious limitation for obtaining sub-shot-noise light from practical semiconductor lasers. We present experimental evidence for our theory.
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Submitted on : Monday, January 10, 2011 - 3:34:23 PM
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A. M. van der Lee, N. J. Van Druten, M. P. Van Exter, J. P. Woerdman, Jean-Philippe Poizat, et al.. Critical Petermann K Factor for Intensity Noise Squeezing. Physical Review Letters, American Physical Society, 2000, 85 (22), pp.4711. ⟨hal-00554272⟩

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