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公开(公告)号：US10677726B2
公开(公告)日：2020-06-09
申请号：US15846912
申请日：2017-12-19
发明人： William Green , Chu Cheyenne Teng , Gerard Wysocki , Chi Xiong , Eric Zhang
摘要： 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.
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公开(公告)号：US20190391330A1
公开(公告)日：2019-12-26
申请号：US16445623
申请日：2019-06-19
发明人： Yves Martin , Jason S. Orcutt , Tymon Barwicz , William Green
摘要： Techniques are provided for single edge coupling of chips with integrated waveguides. For example, a package structure includes a first chip with a first critical edge, and a second chip with a second critical edge. The first and second chips include integrated waveguides with end portions that terminate on the first and second critical edges. The second chip includes a signal reflection structure that is configured to reflect an optical signal propagating in one or more of the integrated waveguides of the second chip. The first and second chips are edge-coupled at the first and second critical edges such that the end portions of the integrated waveguides of the first and second chips are aligned to each other, and wherein all signal input/output between the first and second chips occurs at the single edge-coupled interface.
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公开(公告)号：US20190391329A1
公开(公告)日：2019-12-26
申请号：US16270886
申请日：2019-02-08
发明人： Yves Martin , Jason S. Orcutt , Tymon Barwicz , William Green
摘要： Techniques are provided for single edge coupling of chips with integrated waveguides. For example, a package structure includes a first chip with a first critical edge, and a second chip with a second critical edge. The first and second chips include integrated waveguides with end portions that terminate on the first and second critical edges. The second chip includes a signal reflection structure that is configured to reflect an optical signal propagating in one or more of the integrated waveguides of the second chip. The first and second chips are edge-coupled at the first and second critical edges such that the end portions of the integrated waveguides of the first and second chips are aligned to each other, and wherein all signal input/output between the first and second chips occurs at the single edge-coupled interface.
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公开(公告)号：US11340110B2
公开(公告)日：2022-05-24
申请号：US16123859
申请日：2018-09-06
发明人： William Green , Eric Zhang
摘要： A method for assessing spectroscopic sensor accuracy, includes building an a priori simulation of generalized etalon drift. A spectroscopic sensor is tested to determine use parameters. A specific drift model is generated by applying the determined use parameters to the built a priori simulation of generalized etalon drift. The specific drift model is analyzed to determine whether the spectroscopic sensor is satisfactory.
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5.发明授权公开(公告)号：US11041803B2
公开(公告)日：2021-06-22
申请号：US16364544
申请日：2019-03-26
发明人： William Green , Matthias Dittberner , Chi Xiong , Eric Zhang , Gerard Wysocki
摘要： 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.
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公开(公告)号：US11022542B2
公开(公告)日：2021-06-01
申请号：US16504100
申请日：2019-07-05
发明人： William Green , Chu Cheyenne Teng , Gerard Wysocki , Eric Zhang
摘要： 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.
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公开(公告)号：US20200209148A1
公开(公告)日：2020-07-02
申请号：US16732511
申请日：2020-01-02
摘要： A sensor housing apparatus includes a housing having an enclosure and outer assembly, at least one flow path extending through the housing, a gas sensor disposed in the enclosure and a thermal mass. The thermal mass is mounted within the enclosure in thermal communication with the gas sensor, and is configured to transfer thermal energy from the gas sensor to an ambient environment surrounding the housing and minimize temperature gradients adjacent the gas sensor.
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公开(公告)号：US10578547B2
公开(公告)日：2020-03-03
申请号：US15914455
申请日：2018-03-07
发明人： William Green , Chu Cheyenne Teng , Gerard Wysocki , Eric Zhang
摘要： 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.
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公开(公告)号：US10901146B2
公开(公告)日：2021-01-26
申请号：US16445623
申请日：2019-06-19
发明人： Yves Martin , Jason S. Orcutt , Tymon Barwicz , William Green
摘要： Techniques are provided for single edge coupling of chips with integrated waveguides. For example, a package structure includes a first chip with a first critical edge, and a second chip with a second critical edge. The first and second chips include integrated waveguides with end portions that terminate on the first and second critical edges. The second chip includes a signal reflection structure that is configured to reflect an optical signal propagating in one or more of the integrated waveguides of the second chip. The first and second chips are edge-coupled at the first and second critical edges such that the end portions of the integrated waveguides of the first and second chips are aligned to each other, and wherein all signal input/output between the first and second chips occurs at the single edge-coupled interface.
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公开(公告)号：US20190187020A1
公开(公告)日：2019-06-20
申请号：US15843249
申请日：2017-12-15
发明人： William Green , Levente Klein , Yves C. Martin , Ramachandran Muralidhar , Michael Alan Schappert , Theodore van Kessel
CPC分类号： G01M3/16 , G08B21/12 , H04L67/125 , H04Q9/02 , H04Q2213/13034 , H04W4/70
摘要： Techniques for facilitating event driven gas sensing and source attribution are provided. In one example, a computer-implemented method comprises generating, by a device operatively coupled to a processor, a gas sensor signal indicative of sensing a gas based on the sensing the gas by one or more sensors. Additionally, the computer-implemented method can comprise converting, by the device, the gas sensor signal from an analog signal to a digital signal to identify one or more peak events based on the digital signal being determined to have satisfied a condition.
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