1
Gerald Meltz, Elias Snitzer: Fiber optic strain sensor. United Technologies Corporation, Richard P Lange, October 20, 1981: US04295738 (182 worldwide citation)

An optical fiber having at least two cores positioned in a common cladding can be fabricated to be responsive to strain or hydrostatic pressure but not to temperature through the selection of materials, spacing and shape of the cores and cladding in the fiber. Accordingly, the cross-talk between adj ...


2
William H Glenn, Gerald Meltz, Elias Snitzer: Method for impressing gratings within fiber optics. United Technologies Corporation, Peter R Ruzek, Eric W Petraske, Robert P Sabath, February 16, 1988: US04725110 (168 worldwide citation)

A method of establishing a dielectric periodic index of refraction phase grating upon the core of an optical waveguide by intense angled application of several transverse beams of ultraviolet light, enabling the establishment of a distributed, spatially resolving optical fiber strain gauge.


3
William W Morey, Fred J Leonberger, William H Glenn, Gerald Meltz: Variable optical fiber Bragg filter arrangement. United Technologies Corporation, Peter R Ruzek, April 16, 1991: US05007705 (168 worldwide citation)

A variable light filtering arrangement includes at least one optical fiber section including a waveguiding core, and at least one permanent Bragg grating region in the optical fiber section. The grating region includes a plurality of grating elements constituted by periodic refractive index variatio ...


4
Elias Snitzer, Gerald Meltz: Wide band multicore optical fiber. United Technologies Corporation, Richard P Lange, November 17, 1981: US04300816 (140 worldwide citation)

An optical waveguide having a plurality of cores disposed in a common cladding provides an optical fiber with both a wide bandwidth, by minimizing modal dispersion, and a large aperture to enhance light-carrying capacity. Each of the cores is sized to support only the lowest order mode, HE.sub.11, a ...


5
William H Glenn, Gerald Meltz, Elias Snitzer: Method for impressing gratings within fiber optics. United Technologies Corporation, Peter R Ruzek, February 28, 1989: US04807950 (140 worldwide citation)

An optical fiber has a dielectric periodic index of refraction phase grating established in its core by intense angled application of several transverse beams of ultraviolet light, enabling the establishment of a distributed, spatially resolving optical fiber strain gauge.


6
Gerald Meltz, Neal G Skinner: Distributed flow properties wellbore measurement system. Halliburton Energy Services, Marlin R Smith, April 5, 2005: US06874361 (100 worldwide citation)

A distributed flow properties wellbore measurement system. In a described embodiment, a system for determining at least one parameter of a fluid in a tubular string includes a pressure pulse generator attached to the tubular string and a set of sensors. The generator transmits a pressure pulse throu ...


7
Gerald Meltz, William H Glenn, Elias Snitzer: Distributed, spatially resolving optical fiber strain gauge. United Technologies Corporation, Peter R Ruzek, Eric W Petraske, Robert P Sabath, August 2, 1988: US04761073 (100 worldwide citation)

A distributed, spatially resolving optical fiber strain gauge in which the core of the optical fiber is written with periodic grating patterns effective for transmitting and reflecting light injected into the core. Spectral shifts in the transmitted and reflected light indicate the intensity of stra ...


8
Mauro Varasi, Antonello Vannucci, Mario Signorazzi, Pietro Ferraro, Sabato Inserra Imparato, Claudio Voto, James R Dunphy, Gerald Meltz: Integrated optical instrumentation for the diagnostics of parts by embedded or surface attached optical sensors. Finmeccanica S P A Ramo Aziendale Alenia, United Technologies Corporation, Herbert Dubno, February 20, 1996: US05493390 (96 worldwide citation)

A system based on integrated optical technologies for the measurement and diagnostics of physical parameters on whatever structure, by the use of optical sensors, made by the fiber embedded Bragg grating method and by the use of a planar integrated optics device for the analysis of the optical signa ...


9
James R Dunphy, Gerald Meltz, Mauro Varasi, Antonello Vannucci, Mario Signorazzi, Pietro Ferraro, Sabato I Imparato, Claudio Voto: Embedded optical sensor capable of strain and temperature measurement using a single diffraction grating. United Technologies Corporation, Gerald L DePardo, March 21, 1995: US05399854 (92 worldwide citation)

An embedded optical sensor has a plurality of layers 10-20 and an optical fiber 21 with a fiber grating 28, disposed between the layers 14,16. The layers 10-20 comprise filaments 22 and resin 24 which have different thermal expansion coefficients and the filaments 22 are oriented so as to create une ...


10
Gary A Ball, Gerald Meltz, Leon A Newman: Active multipoint fiber laser sensor. United Technologies Corporation, Gerald L DePardo, May 7, 1996: US05513913 (90 worldwide citation)

A remote active multipoint fiber laser sensor includes a plurality of fiber lasers 12,14,16, each having a pair of Bragg gratings 18,20, embedded in a fiber 10 and excited by a common pump light 30. The lasers 12,14,16 lase at different longitudinal modes (lasing wavelengths) and emit light 32,34,36 ...