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Highly accurate temperature sensor using two fiber Bragg gratings

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2 Author(s)
Shyh-Lin Tsao ; Dept. of Electron. Eng., St. John''s & St. Mary''s Inst. of Technol., Taipei, Taiwan ; Jingshown Wu

A new highly accurate temperature sensor for biomedical applications is proposed. The sensor, including two fiber Bragg gratings with different thermal coefficients, can accurately measure temperature with little laser frequency stabilization. A general theoretical model is established and the performance is analyzed. Some numerical examples from 0.1 °C to 10 °C temperature shift around human body temperature are presented. The novel method immunizes temperature sensing against the frequency drifting of the light source

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:2 ,  Issue: 4 )