Transverse mode selective laser with gain regulation by a digital micromirror device

TL;DR

This paper introduces a flexible laser system that uses a digital micromirror device to dynamically regulate gain distribution, enabling quick and easy generation of structured laser beam patterns for various applications.

Contribution

The novel use of a digital micromirror device for real-time gain regulation in a laser system allows on-demand, customizable beam pattern generation with high flexibility.

Findings

Effective gain regulation via DMD patterns demonstrated

Rapid switching enables dynamic beam pattern control

Flexible system capable of generating various structured laser beams

Abstract

A transverse mode selective laser system with gain regulation by a digital micromirror device (DMD) is presented in this letter. The gain regulation in laser medium is adjusted by the switch of the patterns loaded on DMD. Structured pump beam patterns can be obtained after the reflection of the loaded patterns on DMD, and then it's defocused into a microchip laser medium by a short focal lens, so that the pump patterns can be transferred to the gain medium to regulate the gain distribution. Corresponding structured laser beams can be generated by this laser system. The laser beam pattern can be regulated easily and quickly, by switching the loaded patterns on DMD. Through this method, we show a simple and flexible laser system to generate on-demand laser beam patterns.