115 W fiber laser with an all solid-structure and a large-mode-area multicore fiber

Junhua Ji, Sidharthan Raghuraman, Xiaosheng Huang, Jichao Zang, Daryl Ho, Yanyan Zhou, Yehuda Benudiz, Udi Ben Ami, Amiel A. Ishaaya, Seongwoo Yoo

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We investigate mode-area scaling by means of supermode operation in an all-solid multicore fiber. To obtain a large-mode area (LMA), we designed and fabricated an active double-clad multicore fiber, where each ytterbium-doped core is 19 μm in diameter and has a numerical aperture of 0.067, comparable to the core of the largest available commercial LMA fibers. The six large cores are stacked tightly in a ring structure to enable phase locking of the core fields and supermode operation. The fiber laser performance was investigated in a linear laser cavity with an external Talbot resonator for mode selection. The highest output power achieved was 115 W with an overall 61% slope efficiency corresponding to the pump power. The measured M2 was 1.43 for the central lobe with nearly 70% of the total power.

Original languageEnglish
Pages (from-to)3369-3372
Number of pages4
JournalOptics Letters
Volume43
Issue number14
DOIs
StatePublished - 15 Jul 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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