Fiber-optic instrument for temperature measurement

Kyuma, Kazuo; Tai, Shuichi; Sawada, Takao; Nunoshita, Masahiro

doi:10.1109/jqe.1982.1071607

Cited by 80 publications

(11 citation statements)

References 2 publications

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“…On the other hand, amplitude modulation temperature sensors are based on optical power variations. Some proposed sensors are based on frustration of total internal reflections [5]- [7], light generations [8] or light attenuation [9], among others. The amplitude temperature sensors are usually cheaper than the phase modulation sensors but they need to use a self-referencing technique [10]- [14] to avoid false reading caused by light source fluctuations or other undesired losses.…”

Section: Introductionmentioning

confidence: 99%

Polymer Optical Fiber Temperature Sensor With Dual-Wavelength Compensation of Power Fluctuations

Tapetado

Pinzón

Zubía

et al. 2015

J. Lightwave Technol.

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Abstract:The design and development of a plastic optical fiber macrobend temperature sensor is presented. The sensor can op-erate in a temperature range from −55 to 70 °C and has a linear response versus temperature with a sensitivity of 8.95·10−4 °C−1. The sensor system uses the ratio of transmittance at two wave-lengths to implement a selfreferencing technique in order to avoid undesirable power fluctuations influence. The transmittance ratio precision is 0.1%. An analysis has been developed to find the two wavelengths which ratio offers the highest linearity and sensitiv-ity response. Experimental results are successfully compared with theoretical approaches.

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Section: Introductionmentioning

confidence: 99%

Polymer Optical Fiber Temperature Sensor With Dual-Wavelength Compensation of Power Fluctuations

Tapetado

Pinzón

Zubía

et al. 2015

J. Lightwave Technol.

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“…where ni, n 2 , and no are the refractive indices of the core, cladding, and air, respectively, the total flux inside a uniform fiber is given by 6) where t and t are the Fresnel transmittances across the boundaries no/n, and ni/no, respectively; a(O) is the reflection coefficient for internal reflection; is the absorption coefficient; m is the number of reflections made by the ray; L is the total path length of the ray; r After normalizing, we can rewrite the above equation…”

Section: A Coupling Of a Biconical Fiber Couplermentioning

confidence: 99%

Temperature effects of a multimode biconical fiber coupler

Lit

1986

Appl. Opt.

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“…Commercially, available fiber optic temperature sensors often use a semiconductor-chip, which has an absorption edge that moves with the temperature [5,6]. Other sensors utilize Bragg gratings [7][8][9] or the temperature-dependent fluorescence intensity of certain materials [10] to measure the temperature.…”

Section: Introductionmentioning

confidence: 99%

A fiber optic temperature sensor based on the combination of epoxy and glass particles with different thermo-optic coefficients

Wildner

Drummer

2016

Photonic Sens

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This paper describes the development and function of an optical fiber temperature sensor made out of a compound of epoxy and optical glass particles. Because of the different thermo-optic coefficients of these materials, this compound exhibits a strong wavelength and temperature dependent optical transmission, and it therefore can be employed for fiber optic temperature measurements. The temperature at the sensor, which is integrated into a polymer optical fiber (POF), is evaluated by the ratio of the transmitted intensity of two different light-emitting diodes (LED) with a wavelength of 460 nm and 650 nm. The material characterization and influences of different sensor lengths and two particle sizes on the measurement result are discussed. The temperature dependency of the transmission increases with smaller particles and with increasing sensor length. With glass particles with a diameter of 43 µm and a sensor length of 9.8 mm, the intensity ratio of the two LEDs decreases by 60% within a temperature change from 10℃ to 40℃.

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Fiber-optic instrument for temperature measurement

Cited by 80 publications

References 2 publications

Polymer Optical Fiber Temperature Sensor With Dual-Wavelength Compensation of Power Fluctuations

Polymer Optical Fiber Temperature Sensor With Dual-Wavelength Compensation of Power Fluctuations

Temperature effects of a multimode biconical fiber coupler

A fiber optic temperature sensor based on the combination of epoxy and glass particles with different thermo-optic coefficients

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