Characterization of Cerenkov radiation generated in silica and plastic optical fibers

K. W. Jang; S. H. Shin; S. G. Kim; W. J. Yoo; Y. H. Ji; B. Lee

doi:10.1117/12.2059461

2 June 2014 Characterization of Cerenkov radiation generated in silica and plastic optical fibers

K. W. Jang, S. H. Shin, S. G. Kim, W. J. Yoo, Y. H. Ji, B. Lee

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91571G (2014) https://doi.org/10.1117/12.2059461
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Cerenkov radiation, which is produced by charged particles that pass through optical fibers with a velocity greater than that of light, is frequently regarded as a severe noise signal in a fiber-optic radiation sensor consisting of a scintillator and an optical fiber. Since the spectral range of Cerenkov radiation is very broad and covers that of light outputs from a scintillator, Cerenkov radiation generated in optical fibers is also acquired by a photodetector. However, Cerenkov radiation can be a significant signal when we measure the intensities of Cerenkov radiation generated from fixed length of optical fibers because it is one of the signals induced by interactions between radiations and optical fibers. In this study, gamma-ray induced Cerenkov radiation generated in silica and plastic optical fibers was measured in order to select an efficient optical fiber for producing Cerenkov radiation. The intensities and the spectra of Cerenkov radiation generated in the optical fibers were measured using a spectrometer. As the results, the intensities of Cerenkov radiation generated in silica and plastic optical fibers have peak wavelengths at approximately 500 nm. Also, the intensity of Cerenkov radiation obtained using a plastic wavelength shifting fiber was the highest among all sample optical fibers.

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K. W. Jang, S. H. Shin, S. G. Kim, W. J. Yoo, Y. H. Ji, and B. Lee "Characterization of Cerenkov radiation generated in silica and plastic optical fibers", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571G (2 June 2014); https://doi.org/10.1117/12.2059461

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KEYWORDS

Cerenkov radiation imaging

Optical fibers

Polymer optical fibers

Fiber optics sensors

Silica

Gamma radiation

Spectroscopy

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