Patents by Inventor Claudio O. Egalon
Claudio O. Egalon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7650051Abstract: Distributed fiber optic chemical and physical sensors can provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity. The phenomenon of spatial transient over a length of a fiber introduces such a nonlinearity that can be compensated for by varying at least one parameter of the optical fiber.Type: GrantFiled: August 21, 2007Date of Patent: January 19, 2010Assignee: Optech Ventures, LLCInventors: Robert A. Lieberman, Claudio O. Egalon
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Patent number: 7260283Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due for example to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.Type: GrantFiled: February 28, 2006Date of Patent: August 21, 2007Assignee: Optech Ventures, LLCInventors: Robert A. Lieberman, Claudio O. Egalon
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Patent number: 7006718Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.Type: GrantFiled: November 19, 2003Date of Patent: February 28, 2006Assignee: Intelligent Optical Systems, Inc.Inventors: Robert A. Lieberman, Claudio O. Egalon
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Publication number: 20020018629Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.Type: ApplicationFiled: December 5, 2000Publication date: February 14, 2002Inventors: Robert A. Lieberman, Claudio O. Egalon
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Patent number: 6282338Abstract: An optical fiber waveguide including a selected period reflection grating structure for coupling the forward propagating mode of an optical signal transmitted through the waveguide into a backward propagating interfacial mode where a substantial portion of the optical signal is propagated in the cladding region of the fiber.Type: GrantFiled: February 1, 2000Date of Patent: August 28, 2001Assignee: Intelligent Optical Systems, Inc.Inventor: Claudio O. Egalon
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Patent number: 6205263Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.Type: GrantFiled: June 16, 1999Date of Patent: March 20, 2001Assignee: Intelligent Optical SystemsInventors: Robert A. Lieberman, Claudio O. Egalon
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Patent number: 5780844Abstract: A strain sensor uses optical fibers including strain insensitive portions and a strain sensitive portion. The optical fibers form a sensitive arm of an optical phase locked loop (OPLL). The use of the OPLL allows for multimode optical fiber to be used in a strain insensitive configuration. Only strain information for the strain sensitive portion is monitored rather than the integrated strain measurements commonly made with optical fiber sensors.Type: GrantFiled: April 23, 1996Date of Patent: July 14, 1998Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5705834Abstract: In an LED a large portion of the light produced is lost due to total internal reflection at the air-semiconductor interface. A reverse taper of the semiconductor is used to change the angle at which light strikes the interface so that a greater portion of the light is transmitted.Type: GrantFiled: April 23, 1996Date of Patent: January 6, 1998Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5381493Abstract: A strain sensor is constructed from a two mode optical fiber. When the optical fiber is surface mounted in a straight line and the object to which the optical fiber is mounted is subjected to strain within a predetermined range, the light intensity of any point at the output of the optical fiber will have a linear relationship to strain, provided the following equation is less than 0.17 radians ##EQU1## where n.sub.co represents the refractive index of the core, k represents the wavenumber of the light, L represents the length of the optical fiber, S.sub.1 represents axial strain, V is ##EQU2## U is a solution to the eigenvalue equation of the optical fiber, v.sub.f represents the Poisson ratio, P.sub.ef represents the effective strain-optic coefficient of the optical fiber and n.sub.ln represents ##EQU3## where K.sub.Type: GrantFiled: December 21, 1992Date of Patent: January 10, 1995Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5343550Abstract: An optical fiber comprising a fiber core having a longitudinal symmetry axis is provided. An active cladding surrounds a portion of the fiber core and comprises light-producing sources which emit light in response to chemical or light excitation. The cladding sources are oriented traversely with respect to the longitudinal axis of the fiber core. This polarization results in a superior power efficiency compared to active cladding sources that are randomly polarized or longitudinally polarized parallel with the longitudinal symmetry axis.Type: GrantFiled: February 25, 1993Date of Patent: August 30, 1994Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5343035Abstract: A strain sensor uses an optical fiber including a strain sensitive portion and at least one strain insensitive portion. The strain sensitive portion is mounted on the surface of a structure at a location where a strain is desired to be measured. The strain insensitive portion(s) may be fused to the strain sensitive portion to transmit light therethrough, so that the resulting pattern may be detected to determine the amount of strain by comparison with a similar fiber not subjected to strain, or with the light pattern produced when the fiber is not under strain.Type: GrantFiled: December 21, 1992Date of Patent: August 30, 1994Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5262638Abstract: An optical fiber fluorosensor is provided having a portion of a fiber core which is surrounded by an active cladding which is permeable by the analyte to be sensed and containing substances which emit light waves upon excitation. A remaining portion of the fiber core is surrounded by a guide cladding which guides these light waves to a sensor which detects the intensity of waves, which is a function of the analyte concentration. Contrary to conventional weakly guiding principles, the difference between the respective indices of refraction of the fiber core and the cladding is greater than approximately 0.01. In an alternative embodiment, the fiber core is surrounded by an active cladding which is thin enough such that its index of refraction is effectively that of the surrounding atmosphere, whereby the atmosphere guides the injected light throughout the fiber core.Type: GrantFiled: September 16, 1991Date of Patent: November 16, 1993Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski
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Patent number: 5249251Abstract: An optical fiber is provided comprising an active fiber core which produces waves of light upon excitation. A factor ka is identified and increased until a desired improvement in power efficiency is obtained. The variable "a" is the radius of the active fiber core and "k" is defined as 2.pi..lambda., wherein .lambda. is the wavelength of the light produced by the active fiber core. In one embodiment, the factor ka is increased until the power efficiency stabilizes. In addition to a bare fiber core embodiment, a two-stage fluorescent fiber is provided wherein an active cladding surrounds a portion of the active fiber core having an improved ka factor. The power efficiency of the embodiment is further improved by increasing a difference between the respective indices of refraction of the active cladding and the active fiber core.Type: GrantFiled: March 18, 1992Date of Patent: September 28, 1993Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Claudio O. Egalon, Robert S. Rogowski