Adaptive gas analyzer
    21.
    发明授权

    公开(公告)号:US10677713B1

    公开(公告)日:2020-06-09

    申请号:US15669519

    申请日:2017-08-04

    Abstract: A gas-phase chemical analyzer has at least one gas chromatography column in gas-flow communication with at least one gas carrying tube of an optical absorption cell, a laser for illuminating molecules in a gas mixture flowing though the at least one gas carrying tube of the optical absorption cell, and a photodetector or photodetecting apparatus for measuring absorption spectra of the gas mixture illuminated by the laser. A first module is provided for statically identifying particular molecules in the gas mixture from other molecules in said gas mixture and a second module is provided for comparing at least selected ones of the particular molecules in the gas mixture with a reference library of absorption spectra of previously identified molecules and for determining the likelihood of a correct identification of the particular molecules in the gas mixture and the previously identified molecules in the reference library.

    Push-pull photonic modulator
    22.
    发明授权

    公开(公告)号:US10451951B1

    公开(公告)日:2019-10-22

    申请号:US16054108

    申请日:2018-08-03

    Abstract: A photonic modulator includes a first electro-optical waveguide, the first electro-optical waveguide having a first electro-optical waveguide side and a second electro-optical waveguide side opposite the first electro-optical waveguide side, a second electro-optical waveguide, the second electro-optical waveguide having a third electro-optical waveguide side and a fourth electro-optical waveguide side opposite the third electro-optical waveguide side, a first driven radio frequency electrode coupled to the first electro-optical waveguide side, a second driven radio frequency electrode coupled to the third electro-optical waveguide side, and a floating electrode coupled to the second electro-optical waveguide side and coupled to the fourth electro-optical waveguide side. The second electro-optical waveguide side and the third electro-optical waveguide side face each other and are spaced apart from one another.

    Optical-frequency up-converting spectrometric imager

    公开(公告)号:US10824049B1

    公开(公告)日:2020-11-03

    申请号:US16054233

    申请日:2018-08-03

    Inventor: Daniel Yap

    Abstract: An optical imager comprising an input lens system, a non-linear optic crystal, a pump source, and a photodetector array; the input lens system coupling input or incident light onto the non-linear optic crystal, the pump source providing pump light for the non-linear optical crystal, the non-linear optical crystal producing output light from a combination of the input light and the pump light, and the photodetector array detecting the output light produced by the non-linear optic crystal. The non-linear optic crystal preferably has a waveguided structure. The non-linear optic crystal has an optical cavity which is preferably shared with optical cavities of a plurality of lasers generating the pump light.

    Jammer-suppressed photonic-enabled RF link

    公开(公告)号:US10404381B1

    公开(公告)日:2019-09-03

    申请号:US15803533

    申请日:2017-11-03

    Inventor: Daniel Yap

    Abstract: A radio frequency (RF) link includes a link transmitter that includes a data modulator for modulating a data waveform together with an RF carrier, a photonic encoder coupled to the data modulator, and a transmitter antenna for transmitting an RF signal, wherein the RF signal comprises an output of the photonic encoder, and a link receiver including a receiver antenna for receiving the RF signal, a first laser source, a photonic limiter coupled to the first laser source and to the receiving antenna, a photonic decoder coupled to the photonic limiter, a photo-receiver coupled to the photonic decoder, and a demodulator coupled to the photo-receiver for demodulating an output of the photo-receiver with the RF carrier to form a data output.

    Detection by active spatially and spectrally structured sensing and learning (DAS4L)

    公开(公告)号:US10295462B1

    公开(公告)日:2019-05-21

    申请号:US15445782

    申请日:2017-02-28

    Abstract: A sensor system including a spectrometer with a light source having a plurality of selectable wavelengths, a controller for controlling the sensor system, for selecting wavelengths of illumination light produced by the light source, and for controlling the light source to illuminate a spatial location, a photodetector aligned to detect light received from the spatial location, a blind demixer coupled to the photodetector for separating received spectra in the detected light into a set of sample spectra associated with different demixed or partially demixed chemical components, a memory having a plurality of stored reference spectra, a non-blind demixer coupled to the blind demixer and to the memory for non-blind demixing of the sample spectra using the reference spectra, and a classifier coupled to the non-blind demixer for classifying the set of demixed sample spectra into chemical components using the reference spectra.

    Lateral-effect position-sensing detector

    公开(公告)号:US10128399B1

    公开(公告)日:2018-11-13

    申请号:US15238572

    申请日:2016-08-16

    Inventor: Daniel Yap

    Abstract: A lateral-effect position-sensing detector includes a second lateral-current collector layer, an electron barrier layer on the second lateral-current collector layer, an absorber layer on the electron barrier layer, a first lateral-current collector layer on the absorber layer, and a first elongate electrical contact and a second elongate electrical contact on each of the lateral-current collector layers. Incident light radiates a transparent first lateral-current collector layer to be absorbed by the undepleted absorber layer where electron and holes are generated. The depleted electron barrier layer prevents a flow of electrons from the absorber layer to the second lateral-current collector layer but allows electrons to flow to the second lateral-current collector layer. The lateral-effect position-sensing detector is sensitive to a lateral position between the first elongate electrical contact and the second elongate electrical contact of incident light on each of the lateral-current collector layer.

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