26 November 2007 Recent developments of Bragg gratings in PMMA and TOPAS polymer optical fibers
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Abstract
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.
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David J. Webb, David J. Webb, Kyriacos Kalli, Kyriacos Kalli, Karen Carroll, Karen Carroll, Chi Zhang, Chi Zhang, Michalis Komodromos, Michalis Komodromos, Alex Argyros, Alex Argyros, Maryanne Large, Maryanne Large, Grigoriy Emiliyanov, Grigoriy Emiliyanov, Ole Bang, Ole Bang, Eric Kjaer, Eric Kjaer, } "Recent developments of Bragg gratings in PMMA and TOPAS polymer optical fibers", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683002 (26 November 2007); doi: 10.1117/12.761167; https://doi.org/10.1117/12.761167
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