Novel optical fiber refractometric transducer employing hemispherical detection element

Khotiaintsev, S.; Swart, Pieter L.

doi:10.1117/1.1459052

Cited by 16 publications

(12 citation statements)

References 23 publications

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“…We have shown in [3], however, that the predicted and observed behavior of this transducer differ and the predicted optical response to liquid nitrogen Q= T n=1 /T n=1.21 is relatively small. On the other hand, the theoretically found parameters of the transducer can not be always easily realized in practice.…”

Section: The Optical-fiber Detector For Liquid Nitrogenmentioning

confidence: 66%

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Optical-fiber discrete liquid-level sensor for liquid nitrogen

Khotiaintsev

Romo-Medrano

2005

SPIE Proceedings

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We present a prototype optical-fiber liquid-level sensor for measuring the static and dynamic level of liquid nitrogen in large cryogenic hydraulic systems. This version of sensor is intended for use for various tests of the cryogenic hydraulic systems at their design stage. The sensor employs a total of 140 highly sensitive optical-fiber point detectors of liquid in a form of vertical linear array. The liquid level measurement range is of 1.6 m, a vertical resolution is up to 5 mm. The optical detectors of liquid are multiplexed by means of matrix-type optical fiber network, which operates under robust level-tracking algorithm. A sensor of this type can be used for measuring the level of other cryogenic fluids.

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Section: The Optical-fiber Detector For Liquid Nitrogenmentioning

confidence: 66%

“…In our previous works [3], [4] we described the optical-fiber transducer and in [5] we described a complete optical-fiber system for accessing the level of liquids at conventional temperatures. However, accessing the level of cryogenic fluids involves many specific problems, which are difficult to solve.…”

Section: Introductionmentioning

confidence: 99%

Optical-fiber discrete liquid-level sensor for liquid nitrogen

Khotiaintsev

Romo-Medrano

2005

SPIE Proceedings

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“…The detection element (1) of the transducer can be a segment of the sphere, ellipsoid, or paraboloid. The operation of the transducer is based on the multiple internal reflections of light on the transducer surface that depend on the refractive index of the surrounding medium n. Thus, the transducer optical transmission is a measure of the refractive index of then surrounding media [1], [2]. …”

Section: Optical Fiber Refractometric Transducermentioning

confidence: 99%

“…In our previous work [1] we described the optical fiber refractometric transducer composed of transparent dielectric detection element of hemispherical shape. In [2] we showed that the response of this transducer to the refractive index of the surrounding medium n depends on the geometrical parameters and material constants of the transducer, and can be modified in a wide range by a proper choice of these parameters.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the optical fiber refractometric transducer with the second-order working surface

Khotiaintsev

2006

2006 Multiconference on Electronics and Photonics

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We present the mathematical model, the computational algorithm, and the computer program in Visual Basic developed for the analysis of the optical-fiber refractometric transducer composed of the transparent dielectric detection element and two connecting optical fibers. The developed software performs the numerical ray-tracing of light propagation in the transducer. It allows one to calculate the optical transmission in the transducer as a function of the refractive index of the surrounding medium. The software allows one to analyze the detection elements having a smooth working surface of the second order of any of the following shapes: a segment of a sphere, ellipsoid, and paraboloid. Our results generalize previous work [1], [2] where the element geometry was a hemisphere. We validate our software with known analytical solutions.

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“…These sensors had an oblique disposition, and these researches are conducted the analysis of best response on the degree of misalignment of two fibers, and to the resulting form of its hemispherical surface of contact with surrounding means. These researches always were within the theoretical regime and for monochromatic irradiation, and never had a tangible evidence of an experimental result (Jones & Zimmer, 1978;MolinaFlores, 1995;Khotiaintsev et al, 1996Khotiaintsev et al, , 2000Khotiaintsev et al, , 2002. In 2005 the researcher Esteban Molina Flores, main adviser of this work, proposed and managed to realize the micromachining, one of this microsensorial element with technology of electrical arc, in his particular parallel fiber version, and with surface of semidrop, obtaining theoretical and experimental results in his characterization in the infrared region (1550 nm) for this refractometric microsensor.…”

Section: Introductionmentioning

confidence: 99%