Single-Frequency 336 W Spliceless All-Fiber Amplifier Based on a Chirally-Coupled-Core Fiber for the Next Generation of Gravitational Wave Detectors

Specialty fibers such as chirally-coupled-core fibers show a high potential for further power scaling of single-frequency fiber amplifiers. For the first time, we demonstrate a spliceless all-fiber amplifier, where all optical components are directly integrated in a single Yb^{3+}-doped 3C-fiber. Su...

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Bibliographic Details
Published in:Journal of lightwave technology 2022-04, Vol.40 (7), p.2136-2143
Main Authors: Hochheim, Sven, Brockmuller, Eike, Wessels, Peter, Koponen, Joona, Lowder, Tyson, Novotny, Steffen, Willke, Benno, Neumann, Jorg, Kracht, Dietmar
Format: Article
Language:English
Subjects:
Amplifiers
Chirally-coupled-core fiber
Fibers
gravitational wave detector
Gravitational waves
High power lasers
Isolators
Laser beams
Laser modes
Optical components
Optical polarization
Optical pumping
Polyesters
Power generation
Pump lasers
signal and pump combiner
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Summary:Specialty fibers such as chirally-coupled-core fibers show a high potential for further power scaling of single-frequency fiber amplifiers. For the first time, we demonstrate a spliceless all-fiber amplifier, where all optical components are directly integrated in a single Yb^{3+}-doped 3C-fiber. Such a spliceless laser design enables a compact and robust architecture using specialty fibers, while maintaining excellent beam properties. At an output power of 336 W operating at 1064 nm, a fundamental mode content of 90.4% at a polarization extinction ratio above 13 dB was measured without any impact of transverse mode instabilities or other parasitic effects. This work emphasizes the field of applications of 3C-fibers in high-power laser systems.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2021.3133814