Title :
Highly accurate temperature sensor using two fiber Bragg gratings
Author :
Tsao, Shyh-Lin ; Wu, Jingshown
Author_Institution :
Dept. of Electron. Eng., St. John´´s & St. Mary´´s Inst. of Technol., Taipei, Taiwan
fDate :
12/1/1996 12:00:00 AM
Abstract :
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
Keywords :
biomedical equipment; biomedical measurement; biothermics; diffraction gratings; fibre optic sensors; laser applications in medicine; temperature sensors; 1319 nm; biomedical applications; frequency drifting; highly accurate temperature sensor; human body temperature; laser diode pumped nonplanar Nd:YAG laser; little laser frequency stabilization; numerical examples; performance; temperature shift; thermal coefficients; two fiber Bragg gratings; Biomedical measurements; Biosensors; Fiber lasers; Frequency measurement; Laser modes; Laser stability; Laser theory; Temperature measurement; Temperature sensors; Thermal sensors;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.577312
