CO2-laser-ablation-assisted fabrication of signal-pump combiners with chirally coupled core fibers for co- and counter-pumped all-fiber amplifiers
- authored by
- 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.
- Organisation(s)
-
Institute of Motion Engineering and Mechanism Design
QuantumFrontiers
- External Organisation(s)
-
Laser Zentrum Hannover e.V. (LZH)
nLIGHT Corporation, Lohja
nLIGHT
- Type
- Article
- Journal
- Optics express
- Volume
- 30
- Pages
- 25946-25957
- No. of pages
- 12
- ISSN
- 1094-4087
- Publication date
- 18.07.2022
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic version(s)
-
https://doi.org/10.1364/OE.455606 (Access:
Open)