An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings

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• 作者：Zhihui Luo (1) (2)
  Hongqiao Wen (1)
  Huiyong Guo (1)
  
• 关键词：Fiber Bragg grating ; sensors ; time ; division multiplexing ; semiconductor optical amplifiers ; interrogation
• 刊名：Photonic Sensors
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：4
• 期：2
• 页码：168-172
• 全文大小：359 KB
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  2. D. J. F. Cooper, T. Coroy, and P. W. E. Smith, 鈥淭ime-division-multiplexing of large serial fiber -optic Bragg grating sensor arrays,鈥? / Applied Optics, 2001, 40(11), 2643鈥?554. CrossRef
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• 作者单位：Zhihui Luo (1) (2)
  Hongqiao Wen (1)
  Huiyong Guo (1)
  
  1. National Engineering Laboratory of Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China
  2. China Three Gorges University, Yichang, 443002, China
  
• ISSN：2190-7439

文摘

An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings (FBGs) was proposed. The first semiconductor optical amplifier (SOA) was used to modulate the light, and the second SOA separated the reflected signal from the different FBGs through delayed switching. The proposed system has lower insertion loss and higher spatial resolution, and can interrogate the time- and wavelength-division multiplexed FBG array. Up to 50 FBGs, with a reflectivity of 0.2% and a spatial resolution of 5 m along the optical fiber, were distinguished to demonstrate the interrogation system.