Coherent combining in an Yb doped double core fiber laser

TL;DR

This paper demonstrates high-efficiency coherent combining in a Yb doped double core fiber laser, achieving over 70% slope efficiency with most power in a single mode, using a Michelson interferometer setup.

Contribution

It introduces a novel method for coherent combining in a double core fiber laser with high efficiency and mode purity.

Findings

Over 70% slope efficiency achieved

96% of power in fundamental mode of one core

Effective coupling via biconical fused taper in Michelson interferometer

Abstract

Coherent combining is demonstrated in a clad pumped Yb doped double core fiber laser. A slope efficiency of more than 70 % is achieved with 96 % of the total output power on the fundamental mode of one of the two cores. This high combining efficiency is obtained when both cores are coupled via a biconical fused taper in a Michelson interferometer configuration.