Fibre Bragg gratings fabrication in four core fibres

Changle Wang*, Zhijun Yan, Qizhen Sun, Zhongyuan Sun, Chengbo Mou, Junxi Zhang, Abdulyezir Badmos, Lin Zhang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference publication


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.

Original languageEnglish
Title of host publicationMicro-Structured and Specialty Optical Fibres IV
EditorsKyriacos Kalli, Alexis Mendez
Place of PublicationBellingham, WA (US)
Number of pages9
ISBN (Print)978-1-5106-0131-4
Publication statusPublished - 27 Apr 2016
EventMicro-Structured and Specialty Optical Fibres IV - Brussels, Belgium
Duration: 4 Apr 20166 Apr 2016

Publication series

NameSPIE Proceedings
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045


ConferenceMicro-Structured and Specialty Optical Fibres IV

Bibliographical note

-Changle Wang; Zhijun Yan; Qizhen Sun; Zhongyuan Sun; Chengbo Mou; Junxi Zhang; Abdulyezir Badmos and Lin Zhang; " Fibre Bragg gratings fabrication in four core fibres ", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860H (April 27, 2016).

Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


Funding: EPSRC (UNLOC EP/J017582/1); and E.C. Marie Curie International Incoming fellowship 328263.


  • fibre Bragg grating
  • grating inscription
  • multicore fibre

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