Conversion of out-of-phase to in-phase order in coupled laser arrays with second harmonics

TL;DR

This paper introduces a novel technique using second harmonic generation to convert out-of-phase laser arrays into in-phase arrays, enabling tighter focusing, demonstrated across various geometries with both experimental and theoretical validation.

Contribution

The paper presents a new method leveraging second harmonic generation to achieve phase conversion in coupled laser arrays across multiple geometries.

Findings

Successful phase conversion demonstrated in square, honeycomb, and triangular geometries.

Experimental results align well with theoretical calculations.

Enhanced focusing capability achieved through phase control.

Abstract

A novel method for converting an array of out-of-phase lasers into one of in-phase lasers that can be tightly focused is presented. The method exploits second harmonic generation and can be adapted for different laser arrays geometries. Experimental and calculated results, presented for negatively coupled lasers formed in a square, honeycomb, and triangular geometries are in good agreement.