A fiber-optic current sensor for aerospace applications

Patterson, R. S.; Rose, Allen; Tang, D.; Day, Gordon W.

doi:10.1109/62.61952

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…With further mechanical and environmental exposure, the formation shown in the figure will ultimately lead to a crack propagating into the fiber. However, with proper packaging, the fiber annealed at 850 C can be preserved through many thermal cycles ( 65 to 125 C) and vibration (greater than 20 g or greater than 196 m/s 2 ) [38]. Fig.…”

Section: B Optical Fiber Crystallizationmentioning

confidence: 99%

Devitrification in annealed optical fiber

Rose

1997

J. Lightwave Technol.

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Abstract-The decrease in transmittance of annealed optical fiber has been measured versus temperature and time. The annealing loss is due to the devitrification of the glass and OH absorption in the 1200 to 1500 nm wavelength region. Both loss mechanisms propagate primarily from the surface into the core. However, to increase the OH absorption significantly, annealing times greater than 10 h are required. Fibers heated from 1000 to 1300 C in an air atmosphere quickly devitrify and their transmittance approaches zero. Also, the current sensitivity of annealed fiber current sensors versus annealing time at 850 C has been measured. A decrease in the current sensitivity is attributed to devitrification in the fiber.

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Section: B Optical Fiber Crystallizationmentioning

confidence: 99%

Devitrification in annealed optical fiber

Rose

1997

J. Lightwave Technol.

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“…Several concepts for such sensors based on fiber optic coils [2], bulk rare-earth iron garnets (RIGs) [3], and RIG films [4] have been presented in the past. This paper presents a high-precise optical current sensor based on the Faraday effect ( Fig.…”

Section: Introductionmentioning

confidence: 99%

High-Dynamic and High-Precise Optical Current Measurement System Based on the Faraday Effect

Gerber

Biela

2015

IEEE Trans. Plasma Sci.

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In this paper, a high-dynamic and high-precise optical current measurement system based on the Faraday effect is presented. First, the sensor concept is presented and different sensor constructions are analyzed. Then, a measurement system based on a rare-earth iron garnet film is investigated. The measurement system uses multiple signal processing channels to increase the signal-to-noise ratio. Furthermore, the measurement range exceeds a rotation of 180°and therefore requires a counting mechanism to count the number of rotations. Finally, the precision of the presented system is analyzed. The precision is determined to be 4.9 ppm at a rotation range of 3300°.Index Terms-Current measurement, Faraday effect, fiber optic sensor.

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“…Numerous works are devoted to the development of FES for magnetic …eld and current measurements [1][2][3][4][5][6][7]. There exist two main types of such FESs: all-…ber sensors, in which a …ber serves as a transmitting medium and a sensitive element [8][9][10], and sensors with bulk sensitive elements, in which an optical …ber is used for signal transmission and a material with magneto-optic properties serves as a sensitive element [11][12][13]. Examples of such materials are paramagnetic crystals, ferrite garnet …lms [14][15][16][17][18], diamagnetic glasses [19], and Bi 12 GeO 20 and Bi 12 SiO 20 crystals [20].…”

Section: Introductionmentioning

confidence: 99%