전자공학회논문지A (Journal of the Korean Institute of Telematics and Electronics A)
- 제32A권9호
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- Pages.128-134
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- 1995
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- 1016-135X(pISSN)
광흡수 소자를 이용한 광온도 센서 시스템의 구현
Implementation of fiber-optic temperature sensor system base on optical absorption device
초록
A fiber-optic temperature sensor utilizing an optical absorption device (InP) was fabricated. The spectrum of transmitted light through an InP device was obtained at the three temperatures(249 K, 369 K). A stabilized LED(light emmiting diode) driver, photoreceiver, and signal proocessing electronics were designed. An intensity referencing technique was adopted in order to minimize the fluctuation of output signal due to external pertubation of the transmitting optical fiber. The optical absorption edge of the InP device moves to longer wavelength at a rate of 0.42 nm / K, and energy gap of InP is 1.35 eV at room temperature. From these results, it is concluded that the InP device has temperature dynamic range of 300 K with LED of center wavelength of 940nm and spectral width of 50nm. The designed fiber-optic temperature sensor system showed good linearity within the temperature range from -30
키워드