[23p-A308-1~12] 3.13 Optical control devices and optical fibers (formerly 3.14)

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[23p-A308-9] Time- and wavelength-division multiplexed FBG sensor based on heterodyne detection

〇Takahiro Matsumoto¹, Hisaki Oka¹, Kuroda Keiji¹ (1.Kitasato Univ.)

Keywords:

DFB(Distributed Feedback) laser,Fiber Bragg Grating(FBG),Heterodyne detection

We study sensitive fiber Bragg Grating FBG sensor systems based on heterodyne detection technique. We developed a novel system by applying time- and wavelength-division multiplexing (TDM, WDM), wavelength calibration using an acetylene gas cell, and automatic data acquisition using a LabView software under continuous wavelength tuning through the sweep of a laser temperature. We report on a DM-WDM multiplexed hybrid automatic sensing system with a sufficient S/N ratio and high wavelength resolution.