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

Volume

2

Issue

4

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

894

Lastpage

897

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;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/2944.577312

Filename

577312