Patent
Sapphire optical fiber interferometer
TLDR
An optical interferometer comprises a multi-mode sapphire fiber as a high temperature sensor which produces reference and sensor reflections that produce optical fringes at the output of a detector coupled to the silica optical fiber via an opto-coupler.Abstract:
An optical interferometer comprises a multi-mode sapphire fiber as a high temperature sensor. One end of the sapphire fiber is coupled to a silica fiber and, in turn, to the sapphire fiber. The sapphire fiber sensor produces reference and sensor reflections that produce optical fringes at the output of a detector coupled to the silica optical fiber via an opto-coupler. The optical fringes are related to displacements of the sensor which, in turn, can provide an indirect measurement of pressure, strain or temperature of the surface.read more
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Interferometric sensors utilizing bulk sensing mediums extrinsic to the input/output optical fiber
TL;DR: In this article, the authors proposed an interferometric sensor that permits the simultaneous measurement of a change in more than one environmental condition, which consists of an optical fiber and a plurality of sensing regions positioned in an operable relationship to the optical fiber.
Patent
Single piece fabry-perot optical sensor and method of manufacturing the same
TL;DR: In this article, an optical sensor and a method of manufacturing such a sensor are provided, which includes a lead optical fiber with a single piece optical element joined permanently joined to its forward end.
PatentDOI
Optical fiber sensors for harsh environments
Juncheng Xu,Anbo Wang +1 more
TL;DR: A diaphragm optic sensor comprises a ferrule including a bore having an optical fiber disposed therein and a diaphrasm attached to the ferrule to form a Fabry-Perot cavity as mentioned in this paper.
Patent
Fabry-perot optical sensor and method of manufacturing the same
TL;DR: In this article, a Fabry-Perot optical sensor for sensing a parameter such as pressure or the like is provided, which includes a lead optical fiber from the end of which projects a spacer having an end surface curving inwardly.
Patent
Methods for determining wafer temperature
TL;DR: In this paper, the absorption of a layer in a semiconductor wafer is determined by directing light towards the wafer and measuring light reflected from the Wafer from below the surface upon which the incident light impinges.
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Patent
Fiberoptic sensing of temperature and/or other physical parameters
TL;DR: Several specific types of optical sensors capable of measuring temperature, pressure, force, acceleration, radiation and electrical fields, fluid level, vapor pressure, and the like, along with an electro-optical system for detecting the optical signal developed by the sensor.
Patent
A common optical path interferometric gauge
James P. Waters,Mark R. Fernald +1 more
TL;DR: A common optical path interferometric gauge comprises an optical beam (14) that is split into two beams (12) and recombined after introducing an optical path length difference greater than the coherence length of the optical source.
Patent
Blackbody radiation sensing optical fiber thermometer system
TL;DR: An optical fiber thermometer system utilizing the laws of blackbody radiation includes a sensor responsive to the temperature within a region to be tested for transmitting light energy generated as a function of the temperature according to Planck's equation along an optical transmission line as discussed by the authors.
Patent
Optical system using a luminescent material sensor for measuring very high temperatures
TL;DR: In this paper, a technique of measuring very high temperatures by positioning a blackbody sensor (11) in thermal communication with an environment (15) or object whose temperature is to be measured, communicating infrared emissions having an energy level proportional to such temperature from the sensor to an infrared absorber (19) positioned a distance away from a sensor where the ambient temperature is significantly reduced, and then optically measuring the temperature of the absorber by a technique that uses visible or near visible optical radiation, such as one using a luminescent sensor.
Patent
Fiber optic pyrometry with large dynamic range
TL;DR: In this article, a black body signal source, fiber optic signal coupling, and extension of the transducer dynamic range with optical multiplexing are employed; the instrument operates in the range of 1.6 micrometers of optical energy wavelength.
Related Papers (5)
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