Investigations on birefringence effects in polymer optical fiber Bragg gratings

Hu, X., Sáez Rodríguez, D., Bang, O., Webb, D.J. and Caucheteur, C. (2014). Investigations on birefringence effects in polymer optical fiber Bragg gratings. IN: Micro-structured and specialty optical fibres III. Kalli, Kyriacos and Mendez, Alexis (eds) SPIE proceedings . Bellingham, WA (US): SPIE.

Abstract

Step-index polymer optical fiber Bragg gratings (POFBGs) and microstructured polymer optical fiber Bragg gratings (mPOFBGs) present several attractive features, especially for sensing purposes. In comparison to FBGs written in silica fibers, they are more sensitive to temperature and pressure because of the larger thermo-optic coefficient and smaller Young's modulus of polymer materials. (M)POFBGs are most often photowritten in poly(methylmethacrylate) (PMMA) materials using a continuous-wave 325 nm HeCd laser. For the first time to the best of our knowledge, we study photoinduced birefringence effects in (m)POFBGs. To achieve this, highly reflective gratings were inscribed with the phase mask technique. They were then monitored in transmission with polarized light. For this, (m)POF sections a few cm in length containing the gratings were glued to angled silica fibers. Polarization dependent loss (PDL) and differential group delay (DGD) were computed from the Jones matrix eigenanalysis using an optical vector analyser. Maximum values exceeding several dB and a few picoseconds were obtained for the PDL and DGD, respectively. The response to lateral force was finally investigated. As it induces birefringence in addition to the photo-induced one, an increase of the PDL and DGD values were noticed. © 2014 Copyright SPIE.

Publication DOI: https://doi.org/10.1117/12.2054025
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Hu, X.; Sáez Rodríguez, David; Bang, O.; Webb, D. J.; Caucheteur, C., "Investigations on birefringence effects in polymer optical fiber Bragg gratings", Micro-structured and specialty optical fibres III, eds. Kyriacos Kalli; Alexis Mendez, 91280Q, 2014. Copyright 2014 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. http://dx.doi.org/10.1117/12.2054025
Event Title: Micro-structured and specialty optical fibres III
Event Type: Other
Event Dates: 2014-04-14 - 2014-04-15
Uncontrolled Keywords: birefringence,Bragg grating,polymer optical fiber,sensor,transverse force,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
Full Text Link: http://proceedi ... ticleid=1868443
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2014
Authors: Hu, X.
Sáez Rodríguez, D.
Bang, O.
Webb, D.J. ( 0000-0002-5495-1296)
Caucheteur, C.

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