An Optical Fiber Sensor for the Detection of Germicidal UV Irradiation Using Narrowband Luminescent Coatings

McSherry, M.; Fitzpatrick, Colin; Lewis, Elfed

doi:10.1109/jsen.2004.833504

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…For the spiropyran, we showed that only a certain wavelength band had an impact on the transformation of the merocyanine form, principally in the green. Therefore, the term "recover under visible light" [1,[22][23][24][25][26] can also be more specifically defined in terms of wavelength.…”

Section: Parameters Influencing the Deactivation Of The Merocyanine Formmentioning

confidence: 99%

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Bonefacino¹,

Tse²,

Pun³

et al. 2013

OPJ

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A characterization of photophysical properties of 1, 3-dihydro-1,3,3-compounds hosted in poly(methyl methacrylate) (PMMA) was carried out. The parameters which influenced the photochromic behavior of both compounds were investigated. After ultraviolet (UV) irradiation, it was demonstrated that the temperature was the dominant factor which influenced the deactivation of both materials. For spiropyran, it was demonstrated that the process could be photo-induced with a certain wavelength which we have specified in this manuscript. It was also found that X-Ray did not affect the photo physical properties of spirooxazine and spiropyran. Finally, both materials could be used as low-cost germicidal UV indicators.

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Section: Parameters Influencing the Deactivation Of The Merocyanine Formmentioning

confidence: 99%

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Bonefacino¹,

Tse²,

Pun³

et al. 2013

OPJ

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“…Some UV sensors based on optical fibers coated with phosphor doped polymers were reported in recent decades [ 13 , 14 ]. McSherry et al applied an optical fiber sensor coated with a mixture of phosphor and epoxy to detect UV radiation at 254 nm [ 15 ], the peak Germicidal wavelength value. The use of a coated fluorescent material structure and geometrical considerations often results in the optical signal coupling efficiency being low.…”

Section: Introductionmentioning

confidence: 99%

An Optical Fiber Sensor Based on La2O2S:Eu Scintillator for Detecting Ultraviolet Radiation in Real-Time

Yan

Zhang

et al. 2018

Sensors

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A novel ultraviolet (UV) optical fiber sensor (UVOFS) based on the scintillating material La2O2S:Eu has been designed, tested, and its performance compared with other scintillating materials and other conventional UV detectors. The UVOFS is based on PMMA (polymethyl methacrylate) optical fiber which includes a scintillating material. Scintillating materials provide a unique opportunity to measure UV light intensity even in the presence of strong electromagnetic interference. Five scintillating materials were compared in order to select the most appropriate one for the UVOFS. The characteristics of the sensor are reported, including a highly linear response to radiation intensity, reproducibility, temperature response, and response time (to pulsed light) based on emission from a UV source (UV fluorescence tube) centered on a wavelength of 308 nm. A direct comparison with the commercially available semiconductor-based UV sensor proves the UVOFS of this investigation shows superior performance in terms of accuracy, long-term reliability, response time and linearity.

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“…Typically, the tip of an optical fiber is coated with a suitable luminescent material, and the emitted radiation is collected by the fiber core and transmitted to the diagnostics. While this method enables detection from the ultraviolet (UV) to the x-ray spectral regions [1][2][3][4], spatially resolved measurements are cumbersome and difficult, especially in hazardous environments. In addition, the detectable spectral range is limited by the properties of the luminescent material, and material degradation (e.g., photo-darkening) can severely limit applications when the irradiation levels are high.…”

mentioning

confidence: 99%

Fluorescence-based remote irradiation sensor in liquid-filled hollow-core photonic crystal fiber

Zeltner

Bykov

Xie

et al. 2016

Applied Physics Letters

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We report an irradiation sensor based on a fluorescent "flying particle" that is optically trapped and propelled inside the core of a water-filled hollow-core photonic crystal fiber. When the moving particle passes through an irradiated region, its emitted fluorescence is captured by guided modes of the fiber core and so can be monitored using a filtered photodiode placed at the fiber end. The particle speed and position can be precisely monitored using in-fiber Doppler velocimetry, allowing the irradiation profile to be measured to a spatial resolution of similar to 10 mu m. The spectral response can be readily adjusted by appropriate choice of particle material. Using dye-doped polystyrene particles, we demonstrate detection of green (532 nm) and ultraviolet (340 nm) light. Published by AIP Publishing

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An Optical Fiber Sensor for the Detection of Germicidal UV Irradiation Using Narrowband Luminescent Coatings

Cited by 8 publications

References 4 publications

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

An Optical Fiber Sensor Based on La2O2S:Eu Scintillator for Detecting Ultraviolet Radiation in Real-Time

Fluorescence-based remote irradiation sensor in liquid-filled hollow-core photonic crystal fiber

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