Improving Polarisation Squeezing In Sagnac Interferometer Configuration Using Photonic Crystal Fibre

TL;DR

This paper uses detailed numerical simulations to analyze the limitations of polarization squeezing in photonic crystal fibres within a Sagnac interferometer, considering various physical effects.

Contribution

It provides a comprehensive numerical model that identifies key physical factors limiting squeezing in photonic crystal fibres.

Findings

Loss and phase noise significantly reduce squeezing

Dispersion and self-steepening impact squeezing performance

Physical limitations prevent surpassing standard fibre squeezing levels

Abstract

The greater confinement of light that is possible in photonic crystal fibres leads to a greater effective nonlin- earity, which promises to yield greater quantum squeezing than is possible in standard optical fibre. However, experimental work to date has not achieved improvements over standard fibre. We present a comprehensive numerical investigation of polarisation squeezing in photonic crystal fibre in a Sagnac configuration. By including loss, a non-instantaneous Raman response, excess phase-noise, second- and third-order dispersion and self-steepening, the simulations are able to identify the physical factors that limit current photonic crystal fibre squeezing experiments.