Patents by Inventor Gerard Wysocki

Gerard Wysocki 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).

  • Patent number: 11499867
    Abstract: Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: November 15, 2022
    Assignee: THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Lukasz Sterczewski, Jonas Westberg, Gerard Wysocki
  • Publication number: 20220291119
    Abstract: Disclosed are a system and method for active stabilization of parasitic fringes in optical spectrometers, wherein the spectrometer obtains the transmission spectrum, and a signal processor extracts the etalon drift from the spectral signatures of parasitic fringes. The disclosed approach improves spectrometer accuracy, minimizes drift, and increases time between calibrations.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 15, 2022
    Applicant: The Trustees of Princeton University
    Inventors: Chu C. Teng, Gerard Wysocki
  • Publication number: 20220233097
    Abstract: According to various embodiments, a sensing device for measuring oxygen concentration cycles in breath is disclosed. The sensing device includes a laser configured to emit light at an A-band of oxygen, a lens configured to collimate the light, and a multi-pass cell configured to contain a replaceable sample cell. The light passes through the multi-pass cell and is attenuated by oxygen in the sample cell. The sensing device further includes a photodetector configurated to convert the attenuated light into an electrical signal, and a lock-in amplifier or an equivalent processing circuit configured to determine oxygen concentration from the electrical signal.
    Type: Application
    Filed: May 6, 2020
    Publication date: July 28, 2022
    Applicant: The Trustees of Princeton University
    Inventors: Charles L. Patrick, Jonas Westberg, Gerard Wysocki
  • Publication number: 20210344167
    Abstract: According to various embodiments, a system for stabilizing operation of semiconductor laser frequency combs via optical feedback is disclosed. The system includes an external cavity having a beam-splitter, polarizer, and mirror or partially reflective element mounted on a translational stage. The external cavity and a laser facet of the semiconductor laser form an external optical resonator for coupling light to a laser cavity.
    Type: Application
    Filed: April 30, 2021
    Publication date: November 4, 2021
    Applicant: The Trustees of Princeton University
    Inventors: Chu C. Teng, Jonas Westberg, Gerard Wysocki
  • Publication number: 20210262857
    Abstract: Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes.
    Type: Application
    Filed: April 26, 2021
    Publication date: August 26, 2021
    Applicant: The Trustees of Princeton University
    Inventors: Lukasz STERCZEWSKI, Jonas WESTBERG, Gerard WYSOCKI
  • Patent number: 11085826
    Abstract: 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: Grant
    Filed: January 27, 2020
    Date of Patent: August 10, 2021
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
  • Patent number: 11041803
    Abstract: A generalized feed-forward method for accurate tunable laser absorption spectroscopy includes generating a laser beam. The generated laser beam is directed down a reference path and a test/sample path. One or more parameters are extracted from the reference path. The one or more parameters, extracted from the reference path, are used as feed-forward, to adjust spectral analysis of the test/sample path to detect a composition and/or concentration of an analyte gas within the test/sample path. The extraction of the one or more parameters from the reference path and the spectral analysis of the test/sample path are performed substantially concurrently.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: June 22, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: William Green, Matthias Dittberner, Chi Xiong, Eric Zhang, Gerard Wysocki
  • Patent number: 11022542
    Abstract: 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: Grant
    Filed: July 5, 2019
    Date of Patent: June 1, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Eric Zhang
  • Patent number: 11015975
    Abstract: Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: May 25, 2021
    Assignee: THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Lukasz Sterczewski, Jonas Westberg, Gerard Wysocki
  • Publication number: 20200309690
    Abstract: A generalized feed-forward method for accurate tunable laser absorption spectroscopy includes generating a laser beam. The generated laser beam is directed down a reference path and a test/sample path. One or more parameters are extracted from the reference path. The one or more parameters, extracted from the reference path, are used as feed-forward, to adjust spectral analysis of the test/sample path to detect a composition and/or concentration of an analyte gas within the test/sample path. The extraction of the one or more parameters from the reference path and the spectral analysis of the test/sample path are performed substantially concurrently.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 1, 2020
    Inventors: William Green, Matthias Dittberner, Chi Xiong, Eric Zhang, Gerard Wysocki
  • Patent number: 10677726
    Abstract: 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: Grant
    Filed: December 19, 2017
    Date of Patent: June 9, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Chi Xiong, Eric Zhang
  • Publication number: 20200158573
    Abstract: 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: Application
    Filed: January 27, 2020
    Publication date: May 21, 2020
    Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
  • Patent number: 10656083
    Abstract: A sensitivity boosted laser dispersion spectroscopy system for sensing a sample in a sample cell or in an open path crossing the sample. The system includes a local oscillator arm and a sample arm containing the sample cell or the open path crossing the sample. A laser source is configured to generate a first light beam directed along the sample arm and a second light beam, the second light beam being frequency shifted and directed along the local oscillator arm. An intensity modulator/phase modulator/frequency shifter is disposed in the sample arm configured to generate a multi-frequency beam having known frequency spacing which is then passed through the sample cell to generate a sample arm output. A beam combiner is configured to combine the sample arm output and the second light beam from the local oscillator arm and generate a combined beam. A photodetector is configured to detect the combined beam for sensing the sample in the sample cell.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: May 19, 2020
    Assignee: THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Genevieve Plant, Yifeng Chen, Gerard Wysocki
  • Publication number: 20200109988
    Abstract: Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes.
    Type: Application
    Filed: May 15, 2018
    Publication date: April 9, 2020
    Applicant: The Trustees of Princeton University
    Inventors: Lukasz STERCZEWSKI, Jonas WESTBERG, Gerard WYSOCKI
  • Patent number: 10605663
    Abstract: 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: Grant
    Filed: May 16, 2018
    Date of Patent: March 31, 2020
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
  • Patent number: 10578547
    Abstract: 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: Grant
    Filed: March 7, 2018
    Date of Patent: March 3, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: William Green, Chu Cheyenne Teng, Gerard Wysocki, Eric Zhang
  • Publication number: 20200064192
    Abstract: 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: Application
    Filed: May 16, 2018
    Publication date: February 27, 2020
    Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
  • Publication number: 20190353525
    Abstract: 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: Application
    Filed: May 16, 2018
    Publication date: November 21, 2019
    Inventors: Cheyenne Teng, Gerard Wysocki, Eric J. Zhang, William M. Green
  • Publication number: 20190331593
    Abstract: 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: Application
    Filed: July 5, 2019
    Publication date: October 31, 2019
    Inventors: WILLIAM GREEN, CHU CHEYENNE TENG, GERARD WYSOCKi, ERIC ZHANG
  • Publication number: 20190257751
    Abstract: A sensitivity boosted laser dispersion spectroscopy system for sensing a sample in a sample cell or in an open path crossing the sample. The system includes a local oscillator arm and a sample arm containing the sample cell or the open path crossing the sample. A laser source is configured to generate a first light beam directed along the sample arm and a second light beam, the second light beam being frequency shifted and directed along the local oscillator arm. An intensity modulator/phase modulator/frequency shifter is disposed in the sample arm configured to generate a multi-frequency beam having known frequency spacing which is then passed through the sample cell to generate a sample arm output. A beam combiner is configured to combine the sample arm output and the second light beam from the local oscillator arm and generate a combined beam. A photodetector is configured to detect the combined beam for sensing the sample in the sample cell.
    Type: Application
    Filed: June 6, 2017
    Publication date: August 22, 2019
    Applicant: The Trustees of Princeton University
    Inventors: Genevieve PLANT, Yifeng CHEN, Gerard WYSOCKI