Patents by Inventor Frederic H. Kung
Frederic H. Kung 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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Publication number: 20230286871Abstract: Disclosed is a method of flash sintering a sample composed of ceramic particles by providing laser energy to change the electrical properties of the ceramic material. The processes and systems disclosed herein do not require large heating equipment like a furnace allowing for a portable system of repairing ceramic materials in the field.Type: ApplicationFiled: March 23, 2023Publication date: September 14, 2023Inventors: Guillermo R. Villalobos, Rafael R. Gattass, Michael Hunt, Shyam S. Bayya, Bryan Sadowski, Robert Miklos, Frederic H. Kung, Woohong Kim, L. Brandon Shaw, Jasbinder S. Sanghera, Antti Makinen
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Publication number: 20220332918Abstract: A polymer comprising one or more chalcogenide elements and one or more crosslinking moieties. The crosslinking moieties may be organic, inorganic, or both. Also disclosed is the related method for making a polymer comprising purifying a chalcogenide polymer powder comprising one or more chalcogenide elements, melting the purified chalcogenide polymer powder, adding one or more crosslinking moieties to the melted chalcogenide polymer, and curing the modified chalcogenide polymer at a temperature between 150 and 200° C.Type: ApplicationFiled: June 30, 2022Publication date: October 20, 2022Inventors: Darryl A. Boyd, Vinh Q. Nguyen, Nia A. Pollard, Frederic H. Kung, Daniel J. Gibson, Jason D. Myers, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Patent number: 10948656Abstract: The present invention is generally directed to a device comprising multiple specialty glass optical fibers that combines several different mid-infrared optical signals from multiple optical fibers into one signal in a single optical fiber. In addition, the present invention provides for a method of making the device.Type: GrantFiled: December 22, 2009Date of Patent: March 16, 2021Assignee: The Government of the United States of America, as Represented by the Secretary of the NavyInventors: Daniel J. Gibson, Leslie Brandon Shaw, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Publication number: 20190389776Abstract: Disclosed is a method of flash sintering a sample composed of ceramic particles by providing laser energy to change the electrical properties of the ceramic material. The processes and systems disclosed herein do not require large heating equipment like a furnace allowing for a portable system of repairing ceramic materials in the field.Type: ApplicationFiled: June 21, 2019Publication date: December 26, 2019Inventors: Guillermo R. Villalobos, Rafael R. Gattass, Michael Hunt, Shyam S. Bayya, Bryan Sadowski, Robert Miklos, Frederic H. Kung, Woohong Kim, L. Brandon Shaw, Jasbinder S. Sanghera, Antti Makinen
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Patent number: 10389082Abstract: The invention relates to rare-earth-doped ternary sulfides. The rare-earth-doped ternary sulfides may be used as an active material for mid-wave infrared and long-wave infrared lasers and amplifiers. Methods for producing laser materials including rare-earth-doped ternary sulfides, as well as lasers and amplifiers incorporating the laser materials, are also provided.Type: GrantFiled: April 10, 2018Date of Patent: August 20, 2019Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: L. Brandon Shaw, Michael P. Hunt, Woohong Kim, Shyam S. Bayya, Steven R. Bowman, Frederic H. Kung, Jasbinder S. Sanghera, Christopher G. Brown
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Patent number: 9904007Abstract: The present invention is generally directed to a photonic bad gap fiber and/or fiber preform with a central structured region comprising a first non-silica based glass and a jacket comprising a second non-silica based glass surrounding the central structured region, where the Littleton softening temperature of the second glass is at least one but no more than ten degrees Celsius lower than the Littleton softening temperature of the first glass, or where the base ten logarithm of the glass viscosity in poise of the second glass is at least 0.01 but no more than 2 lower than the base ten logarithm of the glass viscosity in poise of the first glass at a fiber draw temperature. Also disclosed is a method of making a photonic bad gap fiber and/or fiber preform.Type: GrantFiled: June 25, 2015Date of Patent: February 27, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Patent number: 9577401Abstract: Fiber optic amplification in a spectrum of infrared electromagnetic radiation is achieved by creating a chalcogenide photonic crystal fiber (PCF) structure having a radially varying pitch. A chalcogenide PCF system can be tuned during fabrication of the chalcogenide PCF structure, by controlling, the size of the core, the size of the cladding, and the hole size to pitch ratio of the chalcogenide PCF structure and tuned during exercising of the chalcogenide PCF system with pump laser and signal waves, by changing the wavelength of either the pump laser wave or the signal wave, maximization of nonlinear conversion of the chalcogenide PCF, efficient parametric conversion with low peak power pulses of continuous wave laser sources, and minimization of power penalties and minimization of the need for amplification and regeneration of pulse transmissions over the length of the fiber, based on a dispersion factor.Type: GrantFiled: July 31, 2015Date of Patent: February 21, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Daniel J. Gibson, Frederic H. Kung
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Patent number: 9558920Abstract: A fiber-end surface structuring chamber or system having a main body with multiple ports including a fiber-holder port, a process port that is either a stamp/shim holder port or a plasma etching enabler port, an evacuation port, a gas delivery port, and one or more observation ports, where the fiber-end surface structuring system forms structures directly into the end of the fiber to enhance transmission of light over a wide range of wavelengths and increase the laser damage threshold.Type: GrantFiled: September 26, 2014Date of Patent: January 31, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Jasbinder S. Sanghera, Catalin M. Florea, Ishwar D. Aggarwal, Leslie Brandon Shaw, Lynda E. Busse, Frederic H. Kung
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Patent number: 9416042Abstract: The present invention is generally directed to a method of making a hollow-core photonic band gap preform from a specialty glass by pressing a specialty glass through a die to form a tube wherein the outer transverse shape of the tube is a hexagon, triangle, quadrilateral, or other polygon; stretching the tube to form a micro-tube with approximately the same outer transverse shape as the tube; stacking a plurality of micro-tubes into a bundle minimizing voids between adjacent micro-tubes and forming a central longitudinal void wherein the plurality of micro-tubes within the bundle comprise an inner structured region of the preform and the central void of the bundle comprises a hollow core in the preform; and inserting the bundle into a jacket tube. Also disclosed are the hollow-core photonic band gap preform and fiber formed by this method.Type: GrantFiled: December 6, 2010Date of Patent: August 16, 2016Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Publication number: 20160041333Abstract: The present invention is generally directed to a photonic bad gap fiber and/or fiber preform with a central structured region comprising a first non-silica based glass and a jacket comprising a second non-silica based glass surrounding the central structured region, where the Littleton softening temperature of the second glass is at least one but no more than ten degrees Celsius lower than the Littleton softening temperature of the first glass, or where the base ten logarithm of the glass viscosity in poise of the second glass is at least 0.01 but no more than 2 lower than the base ten logarithm of the glass viscosity in poise of the first glass at a fiber draw temperature.Type: ApplicationFiled: June 25, 2015Publication date: February 11, 2016Inventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Publication number: 20150340831Abstract: Fiber optic amplification in a spectrum of infrared electromagnetic radiation is achieved by creating a chalcogenide photonic crystal fiber (PCF) structure having a radially varying pitch. A chalcogenide PCF system can be tuned during fabrication of the chalcogenide PCF structure, by controlling, the size of the core, the size of the cladding, and the hole size to pitch ratio of the chalcogenide PCF structure and tuned during exercising of the chalcogenide PCF system with pump laser and signal waves, by changing the wavelength of either the pump laser wave or the signal wave, maximization of nonlinear conversion of the chalcogenide PCF, efficient parametric conversion with low peak power pulses of continuous wave laser sources, and minimization of power penalties and minimization of the need for amplification and regeneration of pulse transmissions over the length of the fiber, based on a dispersion factor.Type: ApplicationFiled: July 31, 2015Publication date: November 26, 2015Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Daniel J. Gibson, Frederic H. Kung
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Patent number: 9096455Abstract: The present invention is generally directed to a photonic bad gap fiber and/or fiber preform with a central structured region comprising a first non-silica based glass and a jacket comprising a second non-silica based glass surrounding the central structured region, where the Littleton softening temperature of the second glass is at least one but no more than ten degrees Celsius lower than the Littleton softening temperature of the first glass, or where the base ten logarithm of the glass viscosity in poise of the second glass is at least 0.01 but no more than 2 lower than the base ten logarithm of the glass viscosity in poise of the first glass at a fiber draw temperature. Also disclosed is a method of making a photonic bad gap fiber and/or fiber preform.Type: GrantFiled: December 6, 2010Date of Patent: August 4, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Patent number: 8929695Abstract: An N port fiber optical switch includes a movable housing having a perimeter and N corners; a plurality N of optical fibers positioned within the housing and inside the perimeter; and a plurality N of actuators, wherein each actuator is positioned on a corresponding corner such that when selectively activated one or more of the actuators urges the movable housing and the plurality of optical fibers to a selected switch position. The switch provides short switching times and high power handling while allowing for a large number of ports and provides the capability of interfacing with and switching between a variable number of ports.Type: GrantFiled: November 8, 2012Date of Patent: January 6, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Rafael Gattass, Frederic H. Kung, Leslie Brandon Shaw, Ishwar D. Aggarwal, Jasbinder S. Sanghera, Lynda E Busse
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Patent number: 8571371Abstract: A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.Type: GrantFiled: June 15, 2011Date of Patent: October 29, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Pablo C Pureza, Robert E Miklos, Guillermo R. Villalobos, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20120321263Abstract: A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.Type: ApplicationFiled: June 15, 2011Publication date: December 20, 2012Inventors: DANIEL J. GIBSON, Jasbinder S. Sanghera, Frederic H. Kung, Pablo C. Pureza, Robert E. Miklos, Guillermo R. Villalobos, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20120141080Abstract: The present invention is generally directed to a method of making a hollow-core photonic band gap preform from a specialty glass by pressing a specialty glass through a die to form a tube wherein the outer transverse shape of the tube is a hexagon, triangle, quadrilateral, or other polygon; stretching the tube to form a micro-tube with approximately the same outer transverse shape as the tube; stacking a plurality of micro-tubes into a bundle minimizing voids between adjacent micro-tubes and forming a central longitudinal void wherein the plurality of micro-tubes within the bundle comprise an inner structured region of the preform and the central void of the bundle comprises a hollow core in the preform; and inserting the bundle into a jacket tube. Also disclosed are the hollow-core photonic band gap preform and fiber formed by this method.Type: ApplicationFiled: December 6, 2010Publication date: June 7, 2012Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Daniel J Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Publication number: 20120141079Abstract: The present invention is generally directed to a photonic bad gap fiber and/or fiber preform with a central structured region comprising a first non-silica based glass and a jacket comprising a second non-silica based glass surrounding the central structured region, where the Littleton softening temperature of the second glass is at least one but no more than ten degrees Celsius lower than the Littleton softening temperature of the first glass, or where the base ten logarithm of the glass viscosity in poise of the second glass is at least 0.01 but no more than 2 lower than the base ten logarithm of the glass viscosity in poise of the first glass at a fiber draw temperature. Also disclosed is a method of making a photonic bad gap fiber and/or fiber preform.Type: ApplicationFiled: December 6, 2010Publication date: June 7, 2012Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal
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Publication number: 20110038587Abstract: A chalcogenide multi-clad optical fiber having a core, a first cladding and one or more subsequent claddings including a chalcogenide glass. The optical fiber may be capable of transmitting visible and inferred light and may be used for a wide variety of semiconductor applications.Type: ApplicationFiled: August 11, 2009Publication date: February 17, 2011Inventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Daniel J. Gibson, Ishwar D. Aggarwal, Frederic H. Kung
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Publication number: 20110033156Abstract: An optical fiber having microstructured terminal end suitable for reducing Fresnel losses. In an exemplary embodiment, the microstructured surface includes a plurality of protrusions, recesses or combinations thereof that effectively and incrementally change the refractive index of the terminal end of the optical fiber such that the refractive index is gradually drawn closer to the refractive index value of the surrounding environmental medium.Type: ApplicationFiled: August 5, 2010Publication date: February 10, 2011Inventors: Jasbinder S. Sanghera, Catalin M. Florea, Ishwar D. Aggarwal, Leslie Brandon Shaw, Lynda E. Busse, Frederic H. Kung
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Publication number: 20110002585Abstract: The present invention is generally directed to a device comprising multiple specialty glass optical fibers that combines several different mid-infrared optical signals from multiple optical fibers into one signal in a single optical fiber. In addition, the present invention provides for a method of making the device.Type: ApplicationFiled: December 22, 2009Publication date: January 6, 2011Inventors: Daniel J. Gibson, Leslie Brandon Shaw, Jasbinder S. Sanghera, Frederic H. Kung, Ishwar D. Aggarwal