Efficient Raman Frequency Conversion by Feedbacks of Pump and Stokes Fields

TL;DR

This paper demonstrates a simple method for efficient Raman frequency conversion in atomic vapor using feedback of pump and generated fields, achieving high conversion efficiencies suitable for various optical applications.

Contribution

The study introduces a feedback-based approach for Raman conversion in atomic vapor, enhancing efficiency and simplicity over previous methods.

Findings

Achieved 40-50% efficiency for Stokes conversion

Achieved 20-30% efficiency for anti-Stokes conversion

Applicable to various Raman media for broader applications

Abstract

We experimentally demonstrate efficient Raman conversion to respective Stokes and anti-Stokes fields in both pulsed and continuous modes with a Rb-87 atomic vapor cell. The conversion efficiency is about 40-50% for the Stokes field and 20-30% for the anti-Stokes field, respectively. This conversion process is realized with feedback of both the Raman pump and the frequency-converted fields (Stokes or anti-Stokes). The experimental setup is very simple and can be applied easily to produce the light source with larger frequency difference using other Raman media. They may have wide applications in nonlinear optics, atomic physics, quantum optics and precise measurement.