✦ LIBER ✦
Optical fiber temperature sensor using a pair of nonidentical long-period fiber gratings for intensity-based sensing
✍ Scribed by Hajime Sakata; Hisashi Ito
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 190 KB
- Volume
- 280
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
We propose and demonstrate a new technique for intensity-based fiber temperature sensing based on long-period fiber grating pairs having different temperature coefficients and an absorptive core mode blocker placed between the two gratings. The constructed fiber sensor exhibits a bandpass filter response that varies with the temperature. A light-emitting diode is used as the input light source to convert the wavelength shift into an optical intensity change. A photodetector is used to measure the output intensity as a temperature-encoded signal.