A planar optical waveguide sensor for hydrogen sulfide detection

作者：Abdukayum Abdukader; Yimit Abliz^*; Mahmut Mamthin; Itoh Kiminori

来源：Sensor Letters, 2007, 5(2): 395-397.

DOI：10.1166/sl.2007.210

• gas sensor
• optical waveguide
• hydrogen sulfide
• thionine

A planar optical waveguide (OWG) sensor is fabricated by coating a thionine dye-polyvinyl alcohol (PVA) film over a single-mode potassium ion (K+) exchanged glass OWG. In the presence of H,S gas, the color of the thionine-PVA film changed from violet to colorless; this resulted in a decrease in the evanescent absorbance of the film. This sensor exhibits a good linear response to hydrogen sulfide gas in the range of 100 ppb-40 ppm (R = 0.99667) with a rapid response (< 2 s) and good reversibility. The present sensor is also characterized by low cost, simple structure, and easy fabrication.

• 出版日期2007-6
• 单位喀什大学; 新疆大学