Multiplexable Low-Temperature Fiber Bragg Grating Hydrogen Sensors

  title={Multiplexable Low-Temperature Fiber Bragg Grating Hydrogen Sensors},
  author={M. Buric and Tong Chen and Mokhtar Maklad and P R Swinehart and K. P. Chen},
  journal={IEEE Photonics Technology Letters},
A palladium-coated fiber Bragg grating (FBG) inscribed in high attenuation fiber (HAF) capable of measuring hydrogen concentration at -150 degC, well below the 4% explosion limit, is presented. The low-temperature performance of the sensor was improved by heating the gratings as much as 300 K above the ambient temperature with highly attenuated infrared laser light. The sensitivity and response time of the FBG hydrogen sensor were studied as functions of fiber temperature. Through the selection… CONTINUE READING
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