CO2-laser-ablation-assisted fabrication of signal-pump combiners with chirally coupled core fibers for co- and counter-pumped all-fiber amplifiers

verfasst von
Eike Brockmueller, Felix Wellmann, Daniel Lutscher, Ossi Kimmelma, Tyson Lowder, Steffen Novotny, Roland Lachmayer, Jörg Neumann, Dietmar Kracht
Abstract

We report on the development of a side-fused signal-pump combiner with an integrated feed-through 34/250-µm chirally coupled core fiber. The manufacturing process involves a novel rotationally symmetrical cladding restructuring using a CO2-laser beam. The signal-pump combiner exhibits the pump-to-signal fiber coupling efficiency of 90%, signal-to-pump isolation of 30 dB, and is high-power tested at a pump input power of >500 W. Additionally, a signal feed-through loss of 0.23 dB is measured and the S2-method is used to confirm non-degradation of the spatial modes. The side-fused combiner technique has the advantage of an uninterrupted signal core and can be used in co- and counter-pumped configurations.

Organisationseinheit(en)
Institut für Produktentwicklung und Gerätebau
QuantumFrontiers
Externe Organisation(en)
Laser Zentrum Hannover e.V. (LZH)
nLIGHT Corporation, Lohja
nLIGHT
Typ
Artikel
Journal
Optics express
Band
30
Seiten
25946-25957
Anzahl der Seiten
12
ISSN
1094-4087
Publikationsdatum
18.07.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Atom- und Molekularphysik sowie Optik
Elektronische Version(en)
https://doi.org/10.1364/OE.455606 (Zugang: Offen)