Generation of five phase-locked harmonics by implementing a divide-by-three optical frequency divider

TL;DR

This paper demonstrates the generation of five phase-locked optical harmonics with exact frequency ratios using a divide-by-three optical frequency divider in high harmonic generation, enabling coherent multi-wavelength sources for practical applications.

Contribution

It introduces a novel method to produce multiple phase-locked harmonics with precise frequency ratios via a divide-by-three optical frequency divider.

Findings

Generated five phase-locked harmonics with exact ratios

Achieved high phase coherence in time and space

Potential for practical multi-wavelength applications

Abstract

We report the generation of five phase-locked harmonics, f_1: 2403 nm, f_2: 1201 nm, f_3: 801 nm, f_4: 600 nm, and f_5: 480 nm with an exact frequency ratio of 1 : 2 : 3 : 4 : 5 by implementing a divide-by-three optical-frequency divider in the high harmonic generation process. All five harmonics are generated coaxially with high phase coherence in time and space, which are applicable for various practical uses.