Development of a Temperature-Controlled Optical Planar Waveguide Sensor with Lossy Mode Resonance for Refractive Index Measurement

The generation of lossy mode resonances (LMR) with a metallic oxide film deposited on an optical fiber has attracted the attention many applications. However, LMR-based sensor is frangible, and therefore it does not allow control temperature suited to mass production. This paper aims develop temperature-controlled resonance (TC-LMR) planar waveguide active function in which ITO only used as LMR but also provide heating achieve benefits compact size control. A simple flat model about heat transfer mechanism proposed determine time constant for applied voltages. TC-LMR evaluated experimentally refractive index measurement using glycerol solution. functions relative controlled voltages water are obtained verify performance sensor. valuable sensing device that can be clinical testing point care programming precise