Patents by Inventor Jacob B. Khurgin
Jacob B. Khurgin 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: 10054546Abstract: A system and method for detecting an analyte includes a waveguide configured to receive a narrow-band laser signal; and a sorbent material covering an analyte detection region of the waveguide, wherein the sorbent material is configured to sorb the analyte and bring the analyte to an evanescent field of the waveguide, and wherein Raman scattering is produced by an interaction of the evanescent field and the analyte sorbed in the sorbent material along the analyte detection region of the waveguide, and the waveguide is further configured to collect the Raman scattering along the analyte detection region of the waveguide, wherein the collected Raman scattering indicates a type of the analyte.Type: GrantFiled: October 14, 2016Date of Patent: August 21, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Todd H. Stievater, Jacob B. Khurgin, Dmitry A. Kozak, Scott A. Holmstrom, R. Andrew McGill
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Publication number: 20170108439Abstract: A system and method for detecting an analyte includes a waveguide configured to receive a narrow-band laser signal; and a sorbent material covering an analyte detection region of the waveguide, wherein the sorbent material is configured to sorb the analyte and bring the analyte to an evanescent field of the waveguide, and wherein Raman scattering is produced by an interaction of the evanescent field and the analyte sorbed in the sorbent material along the analyte detection region of the waveguide, and the waveguide is further configured to collect the Raman scattering along the analyte detection region of the waveguide, wherein the collected Raman scattering indicates a type of the analyte.Type: ApplicationFiled: October 14, 2016Publication date: April 20, 2017Inventors: Todd H. Stievater, Jacob B. Khurgin, Dmitry A. Kozak, Scott A. Holmstrom, R. Andrew McGill
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Patent number: 9057891Abstract: A waveguide device for frequency mixing or conversion through birefringent phase matching, having a horizontal waveguide suspended above a substrate. The waveguide is formed of a zinc blend type III-V semiconductor material with a high nonlinear susceptibility.Type: GrantFiled: April 22, 2013Date of Patent: June 16, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Todd H. Stievater, Jacob B. Khurgin, Doewon Park, Marcel W. Pruessner, William S. Rabinovich, Rita Mahon
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Patent number: 9054497Abstract: A quantum cascade laser and method of making are disclosed. The quantum cascade laser includes a plurality stages configured in a cascade structure, each stage having a quantum well emission layer and an injection layer, each stage having an upper laser level and a lower laser level. A scattering barrier is located in the quantum well emission layer, the scattering barrier being positioned such that interface roughness (IFR) scattering at the lower laser level is greater than IFR scattering at the upper laser level. The scattering barrier may be located to maximize IFR scattering for the lower laser level and/or minimize IFR scattering for the upper laser level.Type: GrantFiled: September 21, 2012Date of Patent: June 9, 2015Assignees: The Trustees of Princeton University, The Johns Hopkins UniversityInventors: Claire Gmachl, YenTing Chiu, Yamac Dikmelik, Jacob B. Khurgin
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Publication number: 20130294719Abstract: A waveguide device for frequency mixing or conversion through birefringent phase matching, having a horizontal waveguide suspended above a substrate. The waveguide is formed of a zinc blende type III-V semiconductor material with a high nonlinear susceptibility.Type: ApplicationFiled: April 22, 2013Publication date: November 7, 2013Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Todd H. Stievater, Jacob B. Khurgin, Doewon Park, Marcel W. Pruessner, William S. Rabinovich, Rita Mahon
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Patent number: 8427738Abstract: A waveguide device for frequency mixing or conversion through birefringent phase matching, having two suspended horizontal waveguides with an air-filled horizontal nanoslot between them. The waveguides are formed of a material with a high nonlinear susceptibility, and one waveguide can be n-doped with the other waveguide slab being p-doped. The system can be tuned to operate at different frequencies by varying the nanoslot gap distance by electrostatically actuating the suspended air-clad waveguides.Type: GrantFiled: October 8, 2010Date of Patent: April 23, 2013Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Todd H. Stievater, Jacob B. Khurgin, Doewon Park, Marcel W. Pruessner, William S. Rabinovich
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Publication number: 20110188112Abstract: A waveguide device for frequency mixing or conversion through birefringent phase matching, having two suspended horizontal waveguides with an air-filled horizontal nanoslot between them. The waveguides are formed of a material with a high nonlinear susceptibility, and one waveguide can be n-doped with the other waveguide slab being p-doped. The system can be tuned to operate at different frequencies by varying the nanoslot gap distance by electrostatically actuating the suspended air-clad waveguides.Type: ApplicationFiled: October 8, 2010Publication date: August 4, 2011Inventors: Todd H. Stievater, Jacob B. Khurgin, Doewon Park, Marcel W. Pruessner, William S. Rabinovich
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Patent number: 7512338Abstract: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape. The predetermined pulse shape being based on a transmission characteristic of the transmission link.Type: GrantFiled: August 11, 2006Date of Patent: March 31, 2009Assignee: CeLight, Inc.Inventors: Isaac Shpantzer, Israel Smilanski, Jacob B. Khurgin, Vladimir Grigoryan, Pak Shing Cho, Nadejda Reingand, Guy Levy-Yurista, Guoliang Li
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Publication number: 20080175600Abstract: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape.Type: ApplicationFiled: August 11, 2006Publication date: July 24, 2008Inventors: Isaac Shpantzer, Israel Smilanski, Jacob B. Khurgin, Vladimir Grigoryan, Pak Shing Cho, Nadejda Reingand, Guy Levy-Yurista, Guoliang Li
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Patent number: 7397979Abstract: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler is coupled to the first output of the first coupler and to the first output of the second coupler. A fourth coupler is coupled to the second output of the first coupler and to the second output of the second coupler. First and second crossing waveguides are provided with an angle selected to minimize crosstalk and losses between the first and second cross waveguides. The first crossing waveguide connects one of the first or second outputs from the first coupler with an input of the fourth coupler. The second crossing waveguide connects one of the first or second outputs from the second coupler with an input of the third coupler. A first phase shifter is coupled to the first and second waveguides.Type: GrantFiled: December 14, 2006Date of Patent: July 8, 2008Assignee: CeLight, Inc.Inventors: Isaac Shpantzer, Arkady Kaplan, Aviv Salamon, Yaakov Achiam, Jacob B. Khurgin, Michael Tseytlin, Pak Shing Cho, Arthur Greenblatt, Christopher Kerr, Geoffrey Harston
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Patent number: 7391969Abstract: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape. The predetermined pulse shape being based on a transmission characteristic of the transmission link.Type: GrantFiled: December 27, 2006Date of Patent: June 24, 2008Assignee: CeLight, Inc.Inventors: Isaac Shpantzer, Israel Smilanski, Jacob B. Khurgin, Vladimir Grigoryan, Pak Shing Cho, Nadejda Reingand, Guy Levy-Yurista, Guoliang Li
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Patent number: 7327913Abstract: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler is coupled to the first output of the first coupler and to the first output of the second coupler. A fourth coupler is coupled to the second output of the first coupler and to the second output of the second coupler. First and second crossing waveguides are provided with an angle selected to minimize crosstalk and losses between the first and second cross waveguides. The first crossing waveguide connects one of the first or second outputs from the first coupler with an input of the fourth coupler. The second crossing waveguide connects one of the first or second outputs from the second coupler with an input of the third coupler. A first phase shifter is coupled to the first and second waveguides.Type: GrantFiled: September 22, 2003Date of Patent: February 5, 2008Assignee: Celight, Inc.Inventors: Isaac Shpantzer, Arkady Kaplan, Aviv Salamon, Yaakov Achiam, Jacob B. Khurgin, Michael Tseytlin, Pak Shing Cho, Arthur Greenblatt, Christopher Kerr, Geoffrey Harston
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Patent number: 7315697Abstract: A multiple wavelength light source generates an output signal having a comb of accurately spaced apart frequencies with variable free spectral range in the C-band of optical fiber communication. The light source employs an electro-optical modulator (EOM) driven by a signal generator which modulates with EOM with multiple modulation frequencies to widen the output spectrum of signal. The EOM has a crystal provided with a waveguide. The waveguide may be doped with a rare-earth metal to impart gain properties to equalize the intensities of the comb. In one preferred embodiment, Er, Yt or other doping elements provide the gain property to waveguides. The crystal is also provided with periodically poled structure, and this may be engineered so as to form domains of unequal widths to improve the efficiency of modulation. The output signal from the light source may be split and presented to a bank of filters to create a multiple signals, each signal having one of the spaced apart frequencies.Type: GrantFiled: June 18, 2002Date of Patent: January 1, 2008Assignee: CeLight, Inc.Inventors: Israel Smilanski, Isaac Shpantzer, Jacob B. Khurgin, Nadejda Reingand, Pak Shing Cho, Yaakov Achiam
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Patent number: 7277178Abstract: A photo-thermal, interferometric spectroscopy system is disclosed that provides information about a chemical at a remote location. A first light source assembly is included that emits a first beam. The first beam has one or more wavelengths that interact with the chemical and change a refractive index of the chemical. A second light source produces a second beam. The second beam interacts with the chemical resulting in a third beam with a phase change that corresponds with the change of the refractive index of the chemical. A detector system is positioned remote from the chemical to receive at least a portion of the third beam. The detector system provides information on a phase change in the third beam relative to the second beam that is indicative of at least one of, absorption spectrum and concentration of the chemical.Type: GrantFiled: January 13, 2005Date of Patent: October 2, 2007Assignee: Celight, Inc.Inventors: Isaac Shpantzer, Jacob B. Khurgin, Pak Shing Cho, Yaakov Achiam
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Patent number: 7266307Abstract: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape.Type: GrantFiled: August 9, 2002Date of Patent: September 4, 2007Inventors: Isaac Shpantzer, Israel Smilanski, Jacob B. Khurgin, Vladimir Grigoryan, Pak Shing Cho, Nadejda Reingand, Guy Levy-Yurista, Guoliang Li
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Publication number: 20040096143Abstract: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler is coupled to the first output of the first coupler and to the first output of the second coupler. A fourth coupler is coupled to the second output of the first coupler and to the second output of the second coupler. First and second crossing waveguides are provided with an angle selected to minimize crosstalk and losses between the first and second cross waveguides. The first crossing waveguide connects one of the first or second outputs from the first coupler with an input of the fourth coupler. The second crossing waveguide connects one of the first or second outputs from the second coupler with an input of the third coupler. A first phase shifter is coupled to the first and second waveguides.Type: ApplicationFiled: September 22, 2003Publication date: May 20, 2004Applicant: CeLight, Inc.Inventors: Isaac Shpantzer, Arkady Kaplan, Aviv Salamon, Yaakov Achiam, Jacob B. Khurgin, Michael Tseytlin, Pak Shing Cho, Arthur Greenblatt, Christopher Kerr, Geoffrey Harston
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Patent number: 6671425Abstract: The present invention relates to an integrated light source having first and second optical waveguides defining a first optical coupling region for coupling light therebetween. At least one of the optical waveguides includes a gain medium configured to emit light upon irradiation. The light source also includes a first acoustic wave source to subject the first optical coupling region to acoustic waves having a longitudinal frequency &ohgr;AC1, whereby a frequency of light propagating along one of the first and second waveguides differs from a frequency of light propagating along the other waveguide by an amount by an amount &ohgr;AC1.Type: GrantFiled: June 18, 2002Date of Patent: December 30, 2003Assignee: CeLightInventors: Jacob B. Khurgin, Nadejda Reingand, Isaac Shpantzer, Israel Smilanski, Pak Shing Cho
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Publication number: 20030231817Abstract: The present invention relates to an integrated light source having first and second optical waveguides defining a first optical coupling region for coupling light therebetween. At least one of the optical waveguides includes a gain medium configured to emit light upon irradiation. The light source also includes a first acoustic wave source to subject the first optical coupling region to acoustic waves having a longitudinal frequency &ohgr;AC1, whereby a frequency of light propagating along one of the first and second waveguides differs from a frequency of light propagating along the other waveguide by an amount &ohgr;AC1.Type: ApplicationFiled: June 18, 2002Publication date: December 18, 2003Inventors: Jacob B. Khurgin, Nadejda Reingand, Isaac Shpantzer, Israel Smilanski, Pak Shing Cho
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Publication number: 20030147116Abstract: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape.Type: ApplicationFiled: August 9, 2002Publication date: August 7, 2003Inventors: Isaac Shpantzer, Israel Smilanski, Jacob B. Khurgin, Vladimir Grigoryan, Pak Shing Cho, Nadejda Reingand, Guy Levy-Yurista, Guoliang Li
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Patent number: 6600564Abstract: This invention is a device and method for the measurement of optical path length. A frequency chirped electromagnetic wave source, such as a laser beam, is split into two branches. A reference branch is projected directly onto a photosensor, while a probe branch is launched towards a target whose distance relative to the reference path is to be determined. A reflected wave from the target is collected and mixed with the reference onto a photosensor. Due to the unequal path lengths traveled by the reference and the reflected probe laser beams as well as the chirped nature of their frequencies, a certain optical frequency difference exists between the two beams. This frequency difference is linearly proportional to the relative optical path length difference between the two laser beams and the relative optical path length can be readily determined by using a photosensor that generates photocurrents linearly proportional to the relative optical frequency differences between the reference and reflected branches.Type: GrantFiled: May 23, 2000Date of Patent: July 29, 2003Assignee: Brimrose Corporation of AmericaInventors: Chen-Chia Wang, Sudhir Trivedi, Jacob B. Khurgin