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    Brillouin fiber laser spectrometer
    1.
    发明公开
    Brillouin fiber laser spectrometer 审中-公开

    公开(公告)号：US20240133741A1

    公开(公告)日：2024-04-25

    申请号：US18243728

    申请日：2023-09-07

    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

    Inventor： JOSEPH B. MURRAY ,  Brandon Redding ,  Matthew J. Murray

    IPC: G01J3/44 ,  G01J3/12

    CPC classification number: G01J3/4412 ,  G01J3/12

    Abstract: An apparatus includes a spectrometer receiving an optical input signal that includes an input optical spectrum. The spectrometer includes a fiber laser cavity pumped by a first optical replica of the optical input signal that generates stimulated Brillouin scattering traveling in a direction opposite to a direction of the optical input signal. The first optical replica of the optical input signal excites at least one lasing mode in the fiber laser cavity. The at least one lasing mode respectively includes at least one lasing mode frequency. The at least one lasing mode frequency is onset by a respective Brillouin frequency shift from the respective at least one input frequency. The spectrometer also includes an optical heterodyne receiver. The optical heterodyne receiver generates the electrical output signal. The spectrometer outputs a measurement of the input optical spectrum based on the respective Brillouin frequency shift and the at least one input frequency.

    OPTICAL SENSOR DEVICE
    3.
    发明公开
    OPTICAL SENSOR DEVICE 审中-公开

    公开(公告)号：US20230266167A1

    公开(公告)日：2023-08-24

    申请号：US18171221

    申请日：2023-02-17

    Applicant: VIAVI Solutions Inc.

    Inventor： William D. HOUCK

    IPC: G01J3/12 ,  G01J3/28 ,  G01J1/06

    CPC classification number: G01J3/12 ,  G01J3/28 ,  G01J1/06 ,  G01J2003/1226

    Abstract: An optical sensor device includes an optical filter, an optical element, and an optical sensor that includes a plurality of sensor elements. The optical filter is configured to pass, to the optical element, first light beams that are associated with a first subrange of a spectral range and that impinge on the optical filter within a first incidence angle range; and to pass, to the optical element, second light beams that are associated with a second subrange of the spectral range and that impinge on the optical filter within a second incidence angle range. The optical element is configured to cause, based on receiving the first light beams, the first light beams to be directed to a first region of an optical sensor; and to cause, based on receiving the second light beams, the second light beams to be directed to a second region of the optical sensor.

    Hyperspectral image sensor with calibration
    4.
    发明授权
    Hyperspectral image sensor with calibration 有权

    公开(公告)号：US11733095B2

    公开(公告)日：2023-08-22

    申请号：US17302217

    申请日：2021-04-27

    Applicant: IMEC

    Inventor： Nicolaas Tack ,  Andy Lambrechts ,  Luc Haspeslagh

    IPC: G01J3/28 ,  H04N23/11 ,  H04N25/75 ,  G01J3/26 ,  G01J3/12

    CPC classification number: G01J3/2823 ,  G01J3/12 ,  G01J3/26 ,  G01J3/2803 ,  H04N23/11 ,  H04N25/75 ,  G01J2003/1226 ,  G01J2003/265 ,  G01J2003/2806 ,  G01J2003/2826

    Abstract: A method for calibrating an image sensor begins by illuminating a portion of the image sensor with an input light spectrum, where the input light spectrum includes light of known wavelength and intensity. The method continues by sampling an output for each optical sensor of the image sensor, where each optical sensor is associated with one or more optical filters and where each optical filter being associated with a group of optical filters of a plurality of groups of optical filters. Each optical filter of a group of optical filters is configured to pass light in a different wavelength range and at least some optical filters in different groups of the plurality of groups of optical filters are configured to pass light in substantially a same wavelength range. The method then continues by comparing a sampled output for each optical sensor of the plurality of optical sensors with an expected output and generating a calibration factor for each of at least a subset of the plurality of optical sensors and storing the generated calibration factors in memory.

    Approximation-free and Iteration-free Method for Spectral Analysis of Intracavity Electro-optic Modulation Type Optical Frequency Comb, Device and Medium
    5.
    发明公开
    Approximation-free and Iteration-free Method for Spectral Analysis of Intracavity Electro-optic Modulation Type Optical Frequency Comb, Device and Medium 审中-公开

    公开(公告)号：US20230243700A1

    公开(公告)日：2023-08-03

    申请号：US17963254

    申请日：2022-10-11

    Applicant: Harbin Institute of Technology

    Inventor： Ruitao Yang ,  Pengcheng Hu ,  Jiubin Tan

    IPC: G01J3/28 ,  G01J3/12 ,  G01J3/02

    CPC classification number: G01J3/28 ,  G01J3/12 ,  G01J3/0218

    Abstract: The present disclosure provides an approximation-free and iteration-free method for spectral analysis of an intracavity electro-optic modulation type optical frequency comb, a device and a medium. The method includes: calculating a residual phase delay of a single propagation of laser in a resonant cavity, analyzing outgoing transmission characteristics of a light source of the intracavity electro-optic modulation type optical frequency comb, accumulating laser electric field intensities corresponding to all cyclic propagation times n to obtain an outgoing laser electric field intensity E, obtaining a new approximate-free outgoing laser electric field intensity E′ of the intracavity electro-optic modulation type optical frequency comb, obtaining an outgoing laser electric field intensity Ek′ of kth-order comb teeth, calculating an outgoing laser light intensity Ik of the kth-order comb teeth and accurately analyzing a spectrum of the intracavity electro-optic modulation type optical frequency comb, determining a working state according to a simulated spectral envelope curve, and guiding the subsequent optimization design and debugging. The method for the spectral analysis of the optical frequency comb is higher in accuracy without approximation and faster in speed without iteration, and can analyze the spectrum of the intracavity electro-optic modulation type optical frequency comb according to any known working mode.

    Optical filter for an optical sensor device
    6.
    发明授权
    Optical filter for an optical sensor device 有权

    公开(公告)号：US11714002B2

    公开(公告)日：2023-08-01

    申请号：US17818087

    申请日：2022-08-08

    Applicant: VIAVI Solutions Inc.

    Inventor： William D. Houck

    IPC: G01J3/02 ,  G01N21/25 ,  G01J3/12 ,  H01L27/146

    CPC classification number: G01J3/0229 ,  G01J3/0208 ,  G01J3/12 ,  G01N21/255 ,  G01J2003/1226 ,  H01L27/14625

    Abstract: An optical system includes an optical element and an optical filter with a first set of channels and a second set of channels respectively associated with a first region and a second region of the optical filter. The optical element causes first light beams and second light beams associated with a subject to respectively fall incident on the first region within a first incidence angle range and on the second region within a second incidence angle range. A first channel, of the first set of channels, passes, based on the first incidence angle range, a set of the first light beams that are associated with a first subrange of a particular wavelength range. A second channel, of the second set of channels, passes, based on the second incidence angle range, a set of the second light beams that are associated with a second subrange of the particular wavelength range.

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