A Chalcogenide Multimode Interferometric Temperature Sensor Operating at a Wavelength of 2~\mu\text

• Published in: IEEE sensors journal Vol. 17; no. 6; pp. 1721 - 1726
• Main Authors: Lin She, Pengfei Wang, Weimin Sun, Xianfan Wang, Wenlei Yang, Brambilla, Gilberto, Farrell, Gerald
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.03.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arsenic trisulfide; Chalcogenide fiber; multimode interference; Optical fiber communication; Optical fiber polarization; Optical fiber sensors; Propagation modes; Silicon compounds; temperature sensor; Temperature sensors
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/JSEN.2017.2651382

This paper investigated the fabrication of a singlemode-multimode-singlemode fiber structure based on a chalcogenide (As 2 S 3 and As x S 1-x ) multimode fiber sandwiched between two standard silica singlemode fibers using a commercial fiber fusion splicer. The temperature dependence of this hybrid fiber structure was investigated and a first proof of concept showed that the hybrid SMS fiber structure has an average experimental temperature sensitivity of circa 84.38 pm/°C over a temperature range of 20 °C~100°C at the wavelength range around 2 μm. The measured results show a general agreement with numerical simulations based on a guided-mode propagation analysis method. Our result provides a potential platform for the development of compact, high-optical-quality, and robust sensing devices operating at the midinfrared wavelength range.