中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

17 records (took 0.017 seconds)

    Coherent LIDAR method and apparatus
    2.
    发明授权
    Coherent LIDAR method and apparatus 有权

    公开(公告)号：US10901089B2

    公开(公告)日：2021-01-26

    申请号：US15936240

    申请日：2018-03-26

    Applicant: Chunshu Zhang ,  Patrick Dumais ,  Dominic John Goodwill

    Inventor： Chunshu Zhang ,  Patrick Dumais ,  Dominic John Goodwill

    IPC: G01S17/00 ,  G01S17/58 ,  G01S7/481 ,  G01S7/4861

    Abstract: A coherent LIDAR method and apparatus are provided, in which two optical signals having a first frequency difference are reflected by an object. A difference in frequency between the corresponding received and reflected signals is determined. The frequency difference between the reflected signals differs from the first frequency difference due to Doppler effects. The object velocity is determined based on a comparison between the first frequency difference and the frequency difference in the reflected signals. The emitted signals can be produced by modulating a common light source. The reflected signals are inherently mixed at the receiver and further processed. Distance to the object can be determined by pulsing the emitted signals and measuring a time of flight by detecting corresponding pulse edges in the reflected signals, or by using phase sweeping. The emitter can be implemented using an optical phased array.

    Waveguide crossing
    3.
    发明授权
    Waveguide crossing 有权

    公开(公告)号：US09709738B1

    公开(公告)日：2017-07-18

    申请号：US15067443

    申请日：2016-03-11

    Applicant: Patrick Dumais

    Inventor： Patrick Dumais

    IPC: G02B6/125 ,  G02B6/122 ,  G02B6/14

    CPC classification number: G02B6/125 ,  G02B6/1228 ,  G02B6/14

    Abstract: A waveguide crossing includes a first waveguide and a second waveguide intersecting the first waveguide such that a gap equal to a width of the second waveguide is formed in the first waveguide, the second waveguide having a centerline defining a plane of symmetry. The first waveguide has a first waveguide section through which a single optical mode propagates, followed by a first non-adiabatic diverging taper, followed by a second waveguide section wider than the first waveguide section through which two even-order optical modes propagate, followed by a second non-adiabatic diverging taper, followed by a third waveguide section wider than the second waveguide section through which three even-order optical modes propagate. The three even-order modes synthesize to form a quasi-Gaussian beam that self-replicates symmetrically across the gap, thereby providing a low-loss waveguide crossing useful for photonic switching.

    Optical performance monitor
    5.
    发明授权
    Optical performance monitor 有权

    公开(公告)号：US10965370B2

    公开(公告)日：2021-03-30

    申请号：US16889572

    申请日：2020-06-01

    Applicant: Mohammad Mehdi Mansouri Rad ,  Patrick Dumais ,  Trevor James Hall ,  Mehedi Hasan

    Inventor： Mohammad Mehdi Mansouri Rad ,  Patrick Dumais ,  Trevor James Hall ,  Mehedi Hasan

    IPC: H04B10/08 ,  H04B10/079

    Abstract: An optical performance monitor comprises a first stage configured to receive a multiplexed optical signal. The first stage is tunable over a period. The first stage periodically filters the multiplexed optical signal over an optical channel to produce a fine filtered optical signal. A second stage is coupled to the first stage and has a second-stage transfer function. The second stage receives the fine filtered optical signal and produces one or a plurality of interfered optical signal pairs. A third stage is coupled to the second stage and has a third-stage transfer function. The third stage receives the optical signal pairs and demultiplexes the optical signal pairs to produce a plurality of demultiplexed optical signals. The combination of the second-stage transfer function and the third-stage transfer function is flatter over the optical channel than the third-stage transfer function.

    Polarization independent photonic device having multimode component
    8.
    发明授权
    Polarization independent photonic device having multimode component 有权

    公开(公告)号：US10677987B1

    公开(公告)日：2020-06-09

    申请号：US16410430

    申请日：2019-05-13

    Applicant: Patrick Dumais

    Inventor： Patrick Dumais

    IPC: G02B6/27 ,  G02F1/01 ,  G02B6/12

    Abstract: The present invention provides a photonic device such as a variable optical attenuator, in which two signal components, propagating in modes of two different polarization states, are converted to two different modes of the same polarization state prior to modulation. The modulation of both components is performed by a single device which applies the same modulation strength to both components. The two signal components can be converted back to propagate in the two different polarization states following modulation.

    Optical Coupling Using Polarization Beam Displacer
    10.
    发明申请
    Optical Coupling Using Polarization Beam Displacer 有权
    使用偏振光束的光耦合器

    公开(公告)号：US20160377811A1

    公开(公告)日：2016-12-29

    申请号：US15162765

    申请日：2016-05-24

    Applicant: Dominic John Goodwill ,  Patrick Dumais

    Inventor： Dominic John Goodwill ,  Patrick Dumais

    IPC: G02B6/27 ,  G02B6/126 ,  G02B6/30 ,  G02B6/32 ,  G02B6/34

    CPC classification number: G02B6/2706 ,  G02B6/126 ,  G02B6/30 ,  G02B6/32 ,  G02B6/34 ,  G02B2006/12107 ,  G02B2006/12147

    Abstract: An optical coupling apparatus for coupling an optical fiber to a photonic chip is described. The apparatus includes a collimating microlens for collimating light from the optical fiber; a polarization splitting beam displacer for separating the light collimated by the collimating microlens into orthogonally polarized X and Y component beams; at least one focusing microlens for directing the X and Y component beams separately onto the photonic chip; and first and second surface grating couplers (SGCs) orthogonally disposed on the photonic chip and configured for operation in a same polarization state, for coupling the X and Y component beams, respectively, to the photonic chip.

    Abstract translation: 描述了用于将光纤耦合到光子芯片的光耦合装置。 该装置包括用于准直来自光纤的光的准直微透镜; 用于将由准直微透镜校准的光分离成正交偏振的X和Y分量光束的偏振分束光束置换器; 用于将X和Y分量束分别引导到光子芯片上的至少一个聚焦微透镜; 以及正交设置在光子芯片上并被配置为以相同偏振状态操作的第一和第二表面光栅耦合器（SGC），用于将X和Y分量光束分别耦合到光子芯片。

Patent Agency Ranking