Nonlinear Polarization Transfer and Control of Two Laser Beams Overlapping in a Uniform Nonlinear Medium

TL;DR

This paper investigates how two laser beams can exchange and control their polarization states in a nonlinear medium, highlighting the importance of geometry and proposing a solution for practical implementation.

Contribution

It introduces a 2D propagation model revealing challenges in polarization control and proposes using a thin slab medium to overcome these issues.

Findings

2D model shows different polarization transfer results compared to 1D

Challenges identified in implementing polarization control in realistic settings

Proposed thin slab medium as a practical solution

Abstract

A scheme for polarization control using two laser beams in a non-linear optical medium is studied using both co- and counter-propagating beam geometries. In particular, we show that under certain conditions it is possible for two laser beams to exchange their polarization states. A model accounting for a more realistic, 2D propagation geometry is presented. The 2D model produces drastically different results (compared to the 1D propagation geometry), creating difficulties for implementing polarization control in a realistic setting. A proposal for overcoming these difficulties by reducing the non-linear optical medium to a thin slab is presented.