Recent developments of Bragg gratings in PMMA and TOPAS polymer optical fibers

David J. Webb*, Kyriacos Kalli, Karen Carroll, Chi Zhang, Michalis Komodromos, Alex Argyros, Maryanne Large, Grigoriy Emiliyanov, Ole Bang, Eric Kjaer

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication


We report on the temperature response of FBGs recorded in pure PMMA and TOPAS holey fibers. The gratings are fabricated for operational use at near IR wavelengths, using a phase mask and a cw He-Cd laser operating at 325nm. The room temperature grating response is non-linear and characterized by quadratic behavior for temperatures from room temperature to the glass transition temperature, and this permanent change is affected by the thermal history of the gratings. We also report the first FBG inscription in microstructured polymer optical fibers fabricated from TOPAS. This material is fully polymerized and has very low moisture absorption, leading to very good fiber drawing properties. Furthermore, although TOPAS is chemically inert and bio-molecules do not readily bind to its surface, treatment with Antraquinon and subsequent UV activation allows sensing molecules to be deposited in well defined spatial locations. When combined with grating technology this provides considerable potential for label-free bio-sensing.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 2007
EventAdvanced Sensor Systems and Applications III - Beijing, United Kingdom
Duration: 12 Nov 200714 Nov 2007


ConferenceAdvanced Sensor Systems and Applications III
Country/TerritoryUnited Kingdom

Bibliographical note

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