Comparison between femtosecond laser and fusion-arc inscribed long period gratings in photonic crystal fibre


The use of high intensity femtosecond laser sources for inscribing fibre gratings has attained significant interest. The principal advantage of high-energy pulses is their ability for grating inscription in any material type without preprocessing or special core doping. In the field of fibre optical sensing LPGs written in photonic crystal fibre have a distinct advantage of low temperature sensitivity over gratings written in conventional fibre and thus minimal temperature cross-sensitivity. Previous studies have indicated that LPGs written by a point-by-point inscription scheme using a low repetition femtosecond laser exhibit post-fabrication evolution leading to temporal instabilities at room temperatures with respect to spectral location, strength and birefringence of the attenuation bands. These spectral instabilities of LPGs are studied in photonic crystal fibres (endlessly single mode microstructure fibre) to moderately high temperatures 100°C to 200°C and their performance compared to fusion-arc fabricated LPG. Initial results suggest that the fusion-arc fabricated LPG demonstrate less spectral instability for a given constant and moderate temperature, and are similar to the results obtained when inscribed in a standard single mode fibre.

Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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.
Event Title: Photonic Crystal Fibers III
Event Type: Other
Event Dates: 2009-04-22 - 2009-04-23
ISBN: 978-0-8194-7631-9
Last Modified: 29 Nov 2023 13:48
Date Deposited: 13 Dec 2012 10:36
Full Text Link: 10.1117/12.820790
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://proceedi ... ticleid=1339181 (Publisher URL)
PURE Output Type: Conference contribution
Published Date: 2009-05-06
Authors: Allsop, Thomas D.P.
Kalli, Kyriacos
Zhou, Kaiming
Smith, Graham
Komodromos, Michael
Sugden, Kate
Dubov, Mykhaylo
Webb, David J.
Bennion, Ian



Version: Published Version

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