title: Humidity insensitive TOPAS polymer fiber Bragg grating sensor.
abstract: We report the first experimental demonstration of a humidity insensitive polymer optical fiber Bragg grating (FBG), as well as the first FBG recorded in a TOPAS polymer optical fiber in the important low loss 850 nm spectral region. For the demonstration we have fabricated FBGs with resonance wavelength around 850 nm and 1550 nm in single-mode microstructured polymer optical fibers made of TOPAS and the conventional poly (methyl methacrylate) (PMMA). Characterization of the FBGs shows that the TOPAS FBG is more than 50 times less sensitive to humidity than the conventional PMMA FBG in both wavelength regimes. This makes the TOPAS FBG very appealing for sensing applications as it appears to solve the humidity sensitivity problem suffered by the PMMA FBG.
authors: DTU Fotonik, Dept. of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
authors: Wu
authors: W
authors: Yuan
authors: Lutful
authors: L
authors: Khan
authors: David J
authors: DJ
authors: Webb
authors: Kyriacos
authors: K
authors: Kalli
authors: Henrik K
authors: HK
authors: Rasmussen
authors: Alessio
authors: A
authors: Stefani
authors: Ole
authors: O
authors: Bang
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006813:Humidity; D055100:Optical Fibers; D011108:Polymers / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers
chemical_list: D011108:Polymers