[13p-PA2-1~11] 3.14 Optical control devices and optical fibers

[13p-PA2-7] Thermal time constant of high resolution fiber optic temperature sensing system

〇Kazunari Tokunaga¹, Yuji Naitoh¹, Tetsuya Matsuyama¹, Kenji Wada¹, Koichi Okamoto¹ (1.Osaka Pref. Univ.)

Keywords:fiber optic temperature sensor, high resolution, thermal time constant

We have examined a high-resolution temperature sensor based on the precise measurement technique of the optical length of optical fiber using a gain-switched DFB laser. We have estimated thermal time constant of an optical fiber used for the sensing part using the conventional method. But it may be buried in the response time of this sensing system. In this study, we measured the thermal time constant using a faster measurement method.