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 +/- 0.3 dB in optical fibers which when corrected for linear losses is -10.4 +/- 0.8 dB. The measured polarization squeezing as a function of optical pulse energy, which spans a wide range from 3.5-178.8 pJ, shows a very good agreement with the quantum simulations and for the first time we see the experimental proof that Raman effects limit and reduce squeezing at high pulse energy.
@article{arxiv.0709.2280,
title = {Raman-induced limits to efficient squeezing in optical fibers},
author = {Ruifang Dong and Joel Heersink and Joel F. Corney and Peter D. Drummond and Ulrik L. Andersen and Gerd Leuchs},
journal= {arXiv preprint arXiv:0709.2280},
year = {2009}
}