Demodulation of Acoustic Signals in Fiber Bragg Grating Ultrasonic Sensors Using Arrayed Waveguide Gratings
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概要
- 論文の詳細を見る
In this study, we propose a demodulator for fiber Bragg grating (FBG) ultrasonic sensor array using arrayed waveguide grating (AWG). Wavelength modulation in the FBG center wavelength due to ultrasonic sound pressure is transformed to light intensity modulation at the AWG output channels using the slopes of the AWG pass band. We experimentally demonstrate demodulation on the basis of the proposed principle for an FBG immersed in an ultrasonic cleaner. The effects of the relationship between the center wavelengths of FBG and AWG on demodulated signals are investigated in the experiments.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-05-30
著者
-
Ueha Sadayuki
Precision And Intelligence Lab. Tokyo Inst. Of Technol.
-
Nakamura Kentaro
Precision And Intelligence Lab. Tokyo Inst. Of Technol.
-
Fujisue Takuma
Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
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