Realization and characterization of single-frequency tunable 637.2 nm high-power laser

TL;DR

This paper demonstrates a high-power, tunable 637.2 nm laser using sum-frequency generation, with potential applications in UV laser development for atomic physics.

Contribution

The work achieves over 8.75 W of tunable 637.2 nm laser with high efficiency and stability, advancing high-power laser sources in this wavelength.

Findings

Achieved 8.75 W output power at 637.2 nm with 38% efficiency.

Demonstrated good power stability and beam quality.

Potential for generating high-power UV lasers for atomic applications.

Abstract

We report the generation of narrow-linewidth 637.2 nm laser by single-pass sum-frequency generation (SFG) of two infrared lasers at 1560.5 nm and 1076.9 nm in PPMgO:LN crystal. Over 8.75 W of single-frequency continuously tunable 637.2 nm laser is realized, and corresponding conversion efficiency is 38%. We study the behavior of crystals with different poling periods. The detailed experiments show that the output red lasers have very good power stability and beam quality. This high-performance 637.2 nm laser is significant for the realization of high power ultra-violet (UV) 318.6 nm laser via cavity-enhanced frequency doubling. Narrow-linewidth 318.6 nm laser is important for Rydberg excitation of cesium atoms via single-photon transition.