# Generation of polarization squeezed light with an optical parametric amplifier at 795 nm

## TL;DR

This paper demonstrates the generation of polarization squeezed light at 795 nm using an optical parametric amplifier, achieving significant squeezing and anti-squeezing, with potential applications in quantum information and precision measurement.

## Contribution

First experimental realization of polarization squeezing at 795 nm combining quadrature squeezed and coherent beams using a PPKTP-based OPA.

## Key findings

- Achieved -3.8 dB Stokes parameter squeezing
- Observed +5.0 dB anti-squeezing
- Resonant with rubidium D1 line for quantum applications

## Abstract

We report the experimental demonstration of polarization squeezed beam at 795 nm by combining a quadrature squeezed beam with a coherent beam. The quadrature squeezed beam is generated by a degenerate optical parametric amplifier based on a PPKTP crystal. Stokes parameter squeezing of -3.8 dB and anti squeezing of +5.0 dB is observed. This polarization squeezed beam resonant to rubidium D1 line has potential applications in quantum information networks and precise measurement beyond the shot noise limit.

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Source: https://tomesphere.com/paper/1705.08696