Yuan Wu, Khan Lutful, Webb David J, Kalli Kyriacos, Rasmussen Henrik K, Stefani Alessio, Bang Ole
DTU Fotonik, Dept. of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Opt Express. 2011 Sep 26;19(20):19731-9. doi: 10.1364/OE.19.019731.
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.
我们报道了首个对湿度不敏感的聚合物光纤布拉格光栅（FBG）的实验演示，以及在重要的低损耗850纳米光谱区域内首次在TOPAS聚合物光纤中记录的FBG。为了进行演示，我们在由TOPAS和传统聚甲基丙烯酸甲酯（PMMA）制成的单模微结构聚合物光纤中制作了共振波长约为850纳米和1550纳米的FBG。对这些FBG的表征表明，在这两个波长范围中，TOPAS FBG对湿度的敏感度比传统PMMA FBG低50倍以上。这使得TOPAS FBG在传感应用方面极具吸引力，因为它似乎解决了PMMA FBG所面临的湿度敏感问题。
