Simulations and Experiments on Polarisation Squeezing in Optical Fibre

Details Simulations and Experiments on Polarisation Squeezing in Optical Fibre Simulations and Experiments on Polarisation Squeezing in Optical Fibre

2008-07-16

arxiv.org/abs/0807.2502v1

Physics

Quantum Physics

19 pages, lots of figures

Scientific paper

10.1103/PhysRevA.78.023831

We investigate polarisation squeezing of ultrashort pulses in optical fibre, over a wide range of input energies and fibre lengths. Comparisons are made between experimental data and quantum dynamical simulations, to find good quantitative agreement. The numerical calculations, performed using both truncated Wigner and exact $+P$ phase-space methods, include nonlinear and stochastic Raman effects, through coupling to phonons variables. The simulations reveal that excess phase noise, such as from depolarising GAWBS, affects squeezing at low input energies, while Raman effects cause a marked deterioration of squeezing at higher energies and longer fibre lengths. The optimum fibre length for maximum squeezing is also calculated.

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