Abstract

Polarisation squeezing in optical fibres is an efficient means of producing highly squeezed light[l]. Because the experiments operate in a very nonclassical regime, the results are very sensitive to additional nonlinear and thermal effects in the fibre. To quantitatively characterise such experiments, we perform first-principles, quantum dynamical simulations of intense, ultrashort pulses in a fibre, including all significant quantum and thermal noise. We compare simulation and experiments to find excellent agreement over a wide range of pulse energies and fibre lengths[2]. From the simulations, we can identify the particular noise sources that are the limiting factors at high and low input energy. At the optimum energy, we measure squeezing of up to −6.6dB.

© 2007 IEEE