chris yakymyshyn - Academia.edu (original) (raw)
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Graduate Center of the City University of New York
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Nonconventional instrument transformers based on intensity modulation of optical signals have bee... more Nonconventional instrument transformers based on intensity modulation of optical signals have been reported in the literature for more than 20 years. Recently described devices using passive bulk optical sensor elements include the electro-optical voltage transducer (EOVT) and magneto- optic current transducer (MOCT). These technologies offer substantial advantages over conventional instrument transformers in accuracy, optical isolation, bandwidth, environmental compatibility, weight and
Journal of Microbiological Methods, 2004
We have developed an optical microsensor to quantify fluorescent light intensity distribution in ... more We have developed an optical microsensor to quantify fluorescent light intensity distribution in biofilms. The optical system consisted of a beam splitter, light couplers, filters and a spectrophotometer able to accept the fiberoptic cable to measure fluorescent light intensity. The emitted light, fluorescence from the biofilm, was collected at the tip of the optical microsensor and was transferred to a spectrophotometer via a fiberoptic cable. The total fluorescent light intensity was evaluated from the emission spectrum by numerical integration. The newly developed fiberoptic microsensor was tested using a Staphylococcus aureus strain producing yellow fluorescent protein (YFP) grown as biofilm. We used a 405-nm violet laser diode for excitation, and measured the emission intensity between 480 nm and 540 nm. The optical microsensor that quantifies fluorescent light intensity is a promising tool in biofilm research which often requires detection and quantification of fluorescent light intensity distribution generated by various fluorescent proteins. D
This paper describes a novel voltage transducer. Its design is based on a mathematical procedure ... more This paper describes a novel voltage transducer. Its design is based on a mathematical procedure that enables a small number of strategically positioned electric field sensors to accurately measure the voltage. The voltage transducer takes advantage of existing compact, non-intrusive optical electric field sensor technology, specifically, the integrated-optic Pockels cell (IOPC), but is not limited to optical technology. The key advantage of this voltage transducer over other existing optics-based voltage transducer technologies is that it does not require any customized electrode structures and/or special insulation. A highvoltage integrated-optic voltage transducer has been used to obtain measurements with metering class accuracies.
Nonconventional instrument transformers based on intensity modulation of optical signals have bee... more Nonconventional instrument transformers based on intensity modulation of optical signals have been reported in the literature for more than 20 years. Recently described devices using passive bulk optical sensor elements include the electro-optical voltage transducer (EOVT) and magneto- optic current transducer (MOCT). These technologies offer substantial advantages over conventional instrument transformers in accuracy, optical isolation, bandwidth, environmental compatibility, weight and
Journal of Microbiological Methods, 2004
We have developed an optical microsensor to quantify fluorescent light intensity distribution in ... more We have developed an optical microsensor to quantify fluorescent light intensity distribution in biofilms. The optical system consisted of a beam splitter, light couplers, filters and a spectrophotometer able to accept the fiberoptic cable to measure fluorescent light intensity. The emitted light, fluorescence from the biofilm, was collected at the tip of the optical microsensor and was transferred to a spectrophotometer via a fiberoptic cable. The total fluorescent light intensity was evaluated from the emission spectrum by numerical integration. The newly developed fiberoptic microsensor was tested using a Staphylococcus aureus strain producing yellow fluorescent protein (YFP) grown as biofilm. We used a 405-nm violet laser diode for excitation, and measured the emission intensity between 480 nm and 540 nm. The optical microsensor that quantifies fluorescent light intensity is a promising tool in biofilm research which often requires detection and quantification of fluorescent light intensity distribution generated by various fluorescent proteins. D
This paper describes a novel voltage transducer. Its design is based on a mathematical procedure ... more This paper describes a novel voltage transducer. Its design is based on a mathematical procedure that enables a small number of strategically positioned electric field sensors to accurately measure the voltage. The voltage transducer takes advantage of existing compact, non-intrusive optical electric field sensor technology, specifically, the integrated-optic Pockels cell (IOPC), but is not limited to optical technology. The key advantage of this voltage transducer over other existing optics-based voltage transducer technologies is that it does not require any customized electrode structures and/or special insulation. A highvoltage integrated-optic voltage transducer has been used to obtain measurements with metering class accuracies.