Sensitivity improvement of optical-fiber temperature sensor with solid cladding material based on multimode interference. (23rd February 2015)

• Record Type: Journal Article
• Authors: Fukano, Hideki; Kushida, Yohei; Taue, Shuji
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 3(2015:Mar.)
• Publication Date: 2015-02-23
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.032502
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We have developed a simple, high-sensitivity optical-fiber temperature sensor based on multimode interference (MMI). The fabricated MMI structure comprises three segmented fibers: a single-mode fiber (SMF); a large-core multimode fiber (MMF), whose outer surface is coated with a temperature-sensitive material; and another SMF. Fluoroacrylate and silicone rubber are tested as temperature-sensitive cladding materials. The silicone rubber coating exhibits a large shift in interference wavelength with temperature, producing a very fine temperature resolution as low as 0.01 °C.