Abstract

We report new experiments on polarization squeezing using ultrashort photonic pulses in a single pass of a birefringent fiber. We measure what is to our knowledge a record squeezing of 6.8±0.3dB in optical fibers, which when corrected for linear losses is 10.4±0.8dB. The measured polarization squeezing as a function of optical pulse energy, which spans a wide range from 3.5178.8pJ, shows a very good agreement with the quantum simulations, and for the first time we see the proof experimentally that Raman effects limit and reduce squeezing at high pulse energy.

© 2008 Optical Society of America

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