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Proceedings Paper

Fibre Bragg gratings fabrication in four core fibres
Author(s): Changle Wang; Zhijun Yan; Qizhen Sun; Zhongyuan Sun; Chengbo Mou; Junxi Zhang; Abdulyezir Badmos; Lin Zhang
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Paper Abstract

Due to the limitation of the lens effect of the optical fibre and the inhomogeneity of the laser fluence on different cores, it is still challenging to controllably inscribe different fibre Bragg gratings (FBGs) in multicore fibres. In this article, we reported the FBG inscription in four core fibres (FCFs), whose cores are arranged in the corners of a square lattice. By investigating the influence of different inscription conditions during inscription, different results, such as simultaneous inscription of all cores, selectively inscription of individual or two cores, and even double scanning in perpendicular core couples by diagonal, are achieved. The phase mask scanning method, consisting of a 244nm Argon-ion frequencydoubled laser, air-bearing linear transfer stage and cylindrical lens and mirror setup, is used to precisely control the grating inscription in FCFs. The influence of three factors is systematically investigated to overcome the limitations, and they are the defocusing length between the cylindrical lens and the bare fibre, the rotation geometry of the fibre to the irritation beam, and the relative position of the fibre in the vertical direction of the laser beam.

Paper Details

Date Published: 27 April 2016
PDF: 9 pages
Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860H (27 April 2016); doi: 10.1117/12.2227040
Show Author Affiliations
Changle Wang, Aston Univ. (United Kingdom)
Zhijun Yan, Aston Univ. (United Kingdom)
Qizhen Sun, Aston Univ. (United Kingdom)
Huazhong Univ. of Science and Technology (China)
Zhongyuan Sun, Aston Univ. (United Kingdom)
Chengbo Mou, Aston Univ. (United Kingdom)
Junxi Zhang, Aston Univ. (United Kingdom)
Abdulyezir Badmos, Aston Univ. (United Kingdom)
Lin Zhang, Aston Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 9886:
Micro-Structured and Specialty Optical Fibres IV
Kyriacos Kalli; Alexis Mendez, Editor(s)

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