Atomic vapor as a source of tunable, non-Gaussian self-reconstructing optical modes

Jon D Swaim,Kaitlyn N David,Onur Danaci,Ryan T Glasser,Erin M Knutson,Christian Rios

doi:10.1038/srep42311

Abstract

In this manuscript, we demonstrate the ability of nonlinear light-atom interactions to produce tunably non-Gaussian, partially self-healing optical modes. Gaussian spatial-mode light tuned near to the atomic resonances in hot rubidium vapor is shown to result in non-Gaussian output mode structures that may be controlled by varying either the input beam power or the temperature of the atomic vapor. We show that the output modes exhibit a degree of self-reconstruction after encountering an obstruction in the beam path. The resultant modes are similar to truncated Bessel-Gauss modes that exhibit the ability to self-reconstruct earlier upon propagation than Gaussian modes. The ability to generate tunable, self-reconstructing beams has potential applications to a variety of imaging and communication scenarios.

Highlights

CCD C conversion process in this manner should allow for optimization of the self-reconstruction, which we demonstrate for a non-Gaussian beam encountering an obstruction at its center
A small portion of the light is sent to a polarization spectroscopy setup for laser locking, and the remaining optical power is varied by the combination of a half-wave plate and polarizing beam splitter prior to the rubidium cell
Because atomic vapor acts as a nonlinear lens in the conversion process, the defocusing strength of the output mode varies depending on the choice of detuning, input power and cell temperature

Summary

Introduction

CCD C conversion process in this manner should allow for optimization of the self-reconstruction, which we demonstrate for a non-Gaussian beam encountering an obstruction at its center. These findings suggest that tunable, non-Gaussian light generated via atomic vapors may be useful for experiments in quantum information, as well as demonstrating new approaches to optical communication and imaging.

Results

Conclusion