中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

625 records (took 0.066 seconds)

    SYSTEM AND METHOD FOR SPECTRAL FILTERING OF OPTICAL SIGNALS
    131.
    发明申请
    SYSTEM AND METHOD FOR SPECTRAL FILTERING OF OPTICAL SIGNALS 审中-公开

    公开(公告)号：US20190250039A1

    公开(公告)日：2019-08-15

    申请号：US16275623

    申请日：2019-02-14

    Applicant: Gregory S. KANTER

    Inventor： Gregory S. KANTER

    IPC: G01J3/45 ,  G02B27/10 ,  G01B9/02 ,  G02B5/20

    CPC classification number: G01J3/45 ,  G01B9/02 ,  G02B5/20 ,  G02B27/10

    Abstract: A method for spectral filtering an input optical signal is described. The filtering system uses Brillouin gain inside an interferometer. The interferometer is biased to null signals that propagate without Brillouin gain, but due to asymmetric levels of gain in the interferometer arms the interference null is disturbed for signals of an optical frequency that experience Brillouin gain. The filter thereby preferentially passes signal frequencies that are inside the Brillouin gain bandwidth creating a high extinction ratio filter. The narrow bandwidth of the Brillouin gain effect can allow for spectrally narrow filters such as 30 MHz. The filter can be realized in a stable Sagnac loop configuration even if the pump and signal are combined prior to the Sagnac loop by using a power control device such as an attenuator placed asymmetrically inside the loop. The filter can achieve net gain and can be designed to have a tunable bandwidth.

    RECOVERING SPECTRAL SHAPE FROM SPATIAL OUTPUT
    133.
    发明申请
    RECOVERING SPECTRAL SHAPE FROM SPATIAL OUTPUT 审中-公开

    公开(公告)号：US20180292263A1

    公开(公告)日：2018-10-11

    申请号：US15651935

    申请日：2017-07-17

    Applicant: Cymer, LLC

    Inventor： Brian Edward King

    IPC: G01J3/45 ,  G01J3/26

    CPC classification number: G01J3/45 ,  G01J3/26

    Abstract: A method is performed for estimating the optical spectrum of a light beam. The method includes: projecting the light beam onto distinct spatial areas of a spectrometer, wherein each spatial area receives a different filtered version of the optical spectrum; detecting a characteristic of the projected light beam at each of the distinct spatial areas of the spectrometer; receiving a two-dimensional matrix in which each entry of the matrix provides a relationship between one or more spatial areas and each spectral feature, wherein the two-dimensional matrix is related to the input-output relationship of the spectrometer; and estimating the optical spectrum of the light beam based on an analysis that uses both the detected light beam characteristics and the received two-dimensional matrix.

    Method of compensating frequency drift in an interferometer
    140.
    发明授权
    Method of compensating frequency drift in an interferometer 有权

    公开(公告)号：US09846078B2

    公开(公告)日：2017-12-19

    申请号：US14345471

    申请日：2011-10-17

    Applicant: Henrik Vilstrup Juhl

    Inventor： Henrik Vilstrup Juhl

    IPC: G01C19/00 ,  G01J3/45 ,  G01J3/28

    CPC classification number: G01J3/45 ,  G01J2003/283

    Abstract: Compensating for frequency drift of a reference energy source in an FT interferometer based spectrometer instrument may include obtaining data representing a reference interferogram collected in response to a trigger signal having been generated in dependence on the emission frequency of the reference energy source, and subsequently obtaining data representing a target interferogram recorded by the FT interferometer in response to a trigger signal also having been generated in dependence on the emission frequency of the reference energy source in the same manner. The method may further include comparing the obtained data to determine a phase shift between the interferograms in a window in at least one region away from center-burst, and generating a mathematical transform dependent on the determined shift to be subsequently applied to generate data representing a frequency stabilized interferogram of an unknown sample recorded by the FT interferometer.

Patent Agency Ranking