[23a-P02-1~6] 3.13 Optical control devices and optical fibers (formerly 3.14)

[23a-P02-1] FBG sensing based on Time-Division Multiplexed Dual-wavelength differential detection using a DFB laser

〇(M1C)Ui Inaba¹, Keiji Kuroda¹ (1.Kitasato Univ.)

Keywords:Fiber Bragg grating, DFB laser, Dual wavelength differential detection

A Fiber Bragg Grating (FBG) is an optical fiber device that has periodic diffraction gratings inside its fiber core. The grating interval is changed, when a strain is applied to the FBG, or environmental temperature changes. The interval changes results in a shift of a center wavelength of the FBG reflection. Thus, the device can be used as temperature and/or strain sensor heads. One of methods to measure the wavelength shift is dual-wavelength differential detection technique. In this presentation, we report FBG sensing based on Time-Division Multiplexed Dual-wavelength differential detection using a DFB laser.