[17a-A202-1~7] 3.13 Optical control devices and optical fibers (formerly 3.14)

[17a-A202-3] FBG sensing based on Time-and Wavelength-Division Multiplexed Dual-wavelength differential detection

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

Keywords:Optical Fiber Sensor, Fiber Bragg Grating, DFB laser

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 change 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-and Wavelength-Division Multiplexed Dual-wavelength differential detection using a DFB laser.