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Proceedings Paper

Design of a low-bending-loss large-mode-area photonic crystal fiber
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Paper Abstract

We present a design of a photonic crystal fiber for high power laser and amplifier applications. Our fiber comprises a core with a diameter larger than 60 μm and exhibits single mode operation when the fiber is bent around a 10 cm radius at a wavelength of 1064 nm. Single mode guidance is enforced by the high loss of higher order modes which exceeds 80 dB/m whereas the loss of the fundamental mode (FM) is lower than 0.03 dB/m. The fiber can therefore be considered as an active medium for compact high power fiber lasers and amplifiers with a nearly diffraction limited beam output. We also analyze our fiber in terms of tolerance to manufacturing imperfections. To do so we employ a statistical design methodology. This analysis reveals those crucial parameters of the fiber that have to be controlled precisely during the fabrication process not to deteriorate the fiber performance. Finally we show that the fiber can be fabricated according to our design and we present experimental results that confirm the expected fiber performance.

Paper Details

Date Published: 25 April 2012
PDF: 7 pages
Proc. SPIE 8426, Microstructured and Specialty Optical Fibres, 84260T (25 April 2012); doi: 10.1117/12.921780
Show Author Affiliations
Marek Napierala, Vrije Univ. Brussel (Belgium)
Wroclaw Univ. of Technology (Poland)
Elzbieta Beres-Pawlik, Wroclaw Univ. of Technology (Poland)
Tomasz Nasilowski, Military Univ. of Technology (Poland)
Pawel Mergo, Marie Curie-Sklodowska Univ. (Poland)
Francis Berghmans, Vrije Univ. Brussel (Belgium)
Hugo Thienpont, Vrije Univ. Brussel (Belgium)

Published in SPIE Proceedings Vol. 8426:
Microstructured and Specialty Optical Fibres
Kyriacos Kalli; Alexis Mendez, Editor(s)

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