Pump combiner with chirally coupled core fibers for side pumped single frequency all fiber amplifiers

authored by: Eike Brockmüller, Sven Hochheim, Peter Wessels, Joona Koponen, Tyson Lowder, Steffen Novotny, Jörg Neumann, Dietmar Kracht
Abstract: We present the development of an all-fiber side-fused signal-pump-combiner based on an integrated 3C ® feedthrough fiber. This specialty fiber uses a 34 μm single-mode core and shows great potential to enable further output power scaling while maintaining high beam quality. The side-fusing technique has the advantage of an uninterrupted signal core and can be used in co- and counter-pumped fiber lasers and amplifiers. The signal-pump-combiner was operated up to an input power of 600W from four pump fibers and coupling efficiencies of 79% were achieved. The component was additionally investigated by computer tomography imaging, which revealed that the cladding structure of this specialty fiber prevented the required level of glass fusion of the 3C ® fiber with the pump fibers. The investigation will help to further increase the pump coupling efficiency of the signal-pump-combiners. This represents the first step of developing all-fiber and high power capable laser systems based on the 3C ® fiber.
External Organisation(s): Laser Zentrum Hannover e.V. (LZH)
nLIGHT
Type: Conference contribution
Publication date: 05.03.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Electronic version(s): https://doi.org/10.1117/12.2583079 (Access: Closed)

BibTeX

@inproceedings{bba9e255133a435c8be18a8cd97918c3,
title = "Pump combiner with chirally coupled core fibers for side pumped single frequency all fiber amplifiers",
abstract = "We present the development of an all-fiber side-fused signal-pump-combiner based on an integrated 3C {\textregistered} feedthrough fiber. This specialty fiber uses a 34 μm single-mode core and shows great potential to enable further output power scaling while maintaining high beam quality. The side-fusing technique has the advantage of an uninterrupted signal core and can be used in co- and counter-pumped fiber lasers and amplifiers. The signal-pump-combiner was operated up to an input power of 600W from four pump fibers and coupling efficiencies of 79% were achieved. The component was additionally investigated by computer tomography imaging, which revealed that the cladding structure of this specialty fiber prevented the required level of glass fusion of the 3C {\textregistered} fiber with the pump fibers. The investigation will help to further increase the pump coupling efficiency of the signal-pump-combiners. This represents the first step of developing all-fiber and high power capable laser systems based on the 3C {\textregistered} fiber. ",
keywords = "Chirally-coupled-core, Fiber amplifier, Fiber-based, Side-fused, Signal-pump-combiner",
author = "Eike Brockm{\"u}ller and Sven Hochheim and Peter Wessels and Joona Koponen and Tyson Lowder and Steffen Novotny and J{\"o}rg Neumann and Dietmar Kracht",
note = "Funding Information: The authors would like to thank Prof. Willke of the Albert-Einstein-Institut Hannover for the successful and on-going cooperation in the field of single-frequency laser systems for GWDs. This research was partially funded by the Max-Planck-Institute for Gravitational Physics (Hanover, Germany). This work was partially funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy - EXC 2123 QuantumFrontiers 390837967.; Components and Packaging for Laser Systems VII 2021 ; Conference date: 06-03-2021 Through 11-03-2021",
year = "2021",
month = mar,
day = "5",
doi = "10.1117/12.2583079",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Glebov, {Alexei L.} and Leisher, {Paul O.}",
booktitle = "Components and Packaging for Laser Systems VII",
address = "United States",
}