Patents by Inventor Cheyenne Teng
Cheyenne Teng 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: 11085826Abstract: A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.Type: GrantFiled: January 27, 2020Date of Patent: August 10, 2021Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, THE TRUSTEES OF PRINCETON UNIVERSITYInventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
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Patent number: 11022542Abstract: An on-chip spectroscopic sensor includes a tunable diode laser. A laser driver for drives the tunable diode laser. An analyte test cavity receives a chemical sample and exposes the received chemical sample to light from the tunable diode laser. An optical detector detects light emerging from the analyte test cavity as a result of the laser exposure. A spectral analyzer determines a spectrum of the emerging light, matches and removes one or more known optical fringe patterns from the determined spectrum, and determines a composition or concentration of the chemical sample from the optical fringe pattern-removed spectrum.Type: GrantFiled: July 5, 2019Date of Patent: June 1, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Eric Zhang
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Patent number: 10677726Abstract: A tunable diode laser absorption spectroscopy device includes a tunable diode laser. A laser driver is configured to drive the diode laser and ramp it within a particular frequency range. An analyte gas container, a reference gas container, and a fringe generating device are configured to receive the laser therethrough. An optical detector is configured to detect the laser after it has passed through the analyte gas container and/or the reference gas container, and the in-line fringe generating device. An acquisition card is configured to sample an output of the optical detector. A spectral analyzer is configured to receive output data from the acquisition card, determine a spectrum of the output data, decouple the fringe spectrum from the measured spectrum, calibrate the spectrum based on an expected ideal spectrum of both the fringe and reference gas, and determine a composition of the analyte based on the calibrated spectrum.Type: GrantFiled: December 19, 2017Date of Patent: June 9, 2020Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Chi Xiong, Eric Zhang
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Publication number: 20200158573Abstract: A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.Type: ApplicationFiled: January 27, 2020Publication date: May 21, 2020Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
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Patent number: 10605663Abstract: A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain using bandpass filtering to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra using an inverse Fourier transform. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.Type: GrantFiled: May 16, 2018Date of Patent: March 31, 2020Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, THE TRUSTEES OF PRINCETON UNIVERSITYInventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
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Patent number: 10578547Abstract: An on-chip spectroscopic sensor includes a tunable diode laser. A laser driver for drives the tunable diode laser. An analyte test cavity receives a chemical sample and exposes the received chemical sample to light from the tunable diode laser. An optical detector detects light emerging from the analyte test cavity as a result of the laser exposure. A spectral analyzer determines a spectrum of the emerging light, matches and removes one or more known optical fringe patterns from the determined spectrum, and determines a composition or concentration of the chemical sample from the optical fringe pattern-removed spectrum.Type: GrantFiled: March 7, 2018Date of Patent: March 3, 2020Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Eric Zhang
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Publication number: 20200064192Abstract: A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain using bandpass filtering to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra using an inverse Fourier transform. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.Type: ApplicationFiled: May 16, 2018Publication date: February 27, 2020Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
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Publication number: 20190353525Abstract: A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain using bandpass filtering to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra using an inverse Fourier transform. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.Type: ApplicationFiled: May 16, 2018Publication date: November 21, 2019Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
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Publication number: 20190331593Abstract: An on-chip spectroscopic sensor includes a tunable diode laser. A laser driver for drives the tunable diode laser. An analyte test cavity receives a chemical sample and exposes the received chemical sample to light from the tunable diode laser. An optical detector detects light emerging from the analyte test cavity as a result of the laser exposure. A spectral analyzer determines a spectrum of the emerging light, matches and removes one or more known optical fringe patterns from the determined spectrum, and determines a composition or concentration of the chemical sample from the optical fringe pattern-removed spectrum.Type: ApplicationFiled: July 5, 2019Publication date: October 31, 2019Inventors: WILLIAM GREEN, CHU CHEYENNE TENG, GERARD WYSOCKi, ERIC ZHANG
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Publication number: 20190187051Abstract: A tunable diode laser absorption spectroscopy device includes a tunable diode laser. A laser driver is configured to drive the diode laser and ramp it within a particular frequency range. An analyte gas container, a reference gas container, and a fringe generating device are configured to receive the laser therethrough. An optical detector is configured to detect the laser after it has passed through the analyte gas container and/or the reference gas container, and the in-line fringe generating device. An acquisition card is configured to sample an output of the optical detector. A spectral analyzer is configured to receive output data from the acquisition card, determine a spectrum of the output data, decouple the fringe spectrum from the measured spectrum, calibrate the spectrum based on an expected ideal spectrum of both the fringe and reference gas, and determine a composition of the analyte based on the calibrated spectrum.Type: ApplicationFiled: December 19, 2017Publication date: June 20, 2019Inventors: William GREEN, Chu Cheyenne TENG, Gerard WYSOCKI, Chi XIONG, Eric ZHANG
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Publication number: 20180328840Abstract: An on-chip spectroscopic sensor includes a tunable diode laser. A laser driver for drives the tunable diode laser. An analyte test cavity receives a chemical sample and exposes the received chemical sample to light from the tunable diode laser. An optical detector detects light emerging from the analyte test cavity as a result of the laser exposure. A spectral analyzer determines a spectrum of the emerging light, matches and removes one or more known optical fringe patterns from the determined spectrum, and determines a composition or concentration of the chemical sample from the optical fringe pattern-removed spectrum.Type: ApplicationFiled: March 7, 2018Publication date: November 15, 2018Inventors: WILLIAM GREEN, Chu Cheyenne Teng, Gerard Wysocki, Eric Zhang