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A Distributed Fibre Bragg Grating Sensor Interrogator Employing a Reformative Arrayed Waveguide Grating |
HUANG Jing-Tang;HUANG Xu-Guang;ZHAO Hua-Wei |
Lab of Photonics Information Technology, South China Normal University, Guangzhou 510006 |
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Cite this article: |
HUANG Jing-Tang, HUANG Xu-Guang, ZHAO Hua-Wei 2008 Chin. Phys. Lett. 25 1329-1332 |
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Abstract We present an interrogating technique employing a reformative arrayed waveguide grating without output waveguides in combination with a linear charge coupled device. A simple and effective data processing method called area equalized point is used to improve the system resolution. The simulation results show that the wavelength shift of a fibre Bragg grating with temperature can be precisely measured by this interrogation technique. The temperature accuracy and wavelength resolution of the sensor system are smaller than 0.08°C and 0.8pm, respectively. If the FBG 3dB-bandwidth is 0.2nm with the wavelength spacing between two adjacent FBGs of 1.4nm, the temperature and wavelength errors caused by crosstalk are respectively 0.01°C and 0.1pm.
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Keywords:
42.81.Pa
42.79.Qx
07.07.Df
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Received: 08 January 2008
Published: 31 March 2008
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PACS: |
42.81.Pa
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(Sensors, gyros)
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42.79.Qx
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(Range finders, remote sensing devices; laser Doppler velocimeters, SAR, And LIDAR)
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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