3 October 2013 Interrogation system for a sensor array with 1310-nm band ultra-weak fiber Bragg gratings
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Optical Engineering, 52(10), 107101 (2013). doi:10.1117/1.OE.52.10.107101
Abstract
An interrogation system for the time-division multiplexed sensor array based on 1310-nm band ultra-weak fiber Bragg gratings (FBGs) was proposed in this study. Power spectral density was introduced to budget the optical power and evaluate the interrogation capability of the proposed system. The proposed system consists of one tunable laser and two semiconductor optical amplifiers, where the former scans the wavelength, and the latter modulates the light and separates the reflected pulses from different FBGs through delayed switching. Up to 1000 serial FBGs, with a peak reflectivity of −40 to −45  dB and a spatial resolution of 5 m along an optical fiber, were interrogated to demonstrate the feasibility of the interrogation system.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhihui Luo, Huiyong Guo, Hongqiao Wen, "Interrogation system for a sensor array with 1310-nm band ultra-weak fiber Bragg gratings," Optical Engineering 52(10), 107101 (3 October 2013). http://dx.doi.org/10.1117/1.OE.52.10.107101
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KEYWORDS
Fiber Bragg gratings

Sensors

Modulation

Reflectivity

Signal detection

Multiplexing

Sensing systems

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