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    GRADED-INDEX POLYMER OPTICAL FIBRE AND THE FABRICATION THEREOF
    6.
    发明公开
    GRADED-INDEX POLYMER OPTICAL FIBRE AND THE FABRICATION THEREOF 审中-公开

    公开(公告)号：US20230314696A1

    公开(公告)日：2023-10-05

    申请号：US17710926

    申请日：2022-03-31

    申请人： Microsoft Technology Licensing, LLC

    发明人： Paolo COSTA ,  Gilberto BRAMBILLA ,  Kai SHI ,  Hitesh BALLANI ,  Richard James BACA

    IPC分类号： G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/02038 ,  G02B6/03633

    摘要： A method of fabricating a graded-index polymer optical fibre comprises preparing a cladding composition, the cladding composition comprising either a mixture of a cladding polymer and a dopant or a mixture of a cladding polymer precursor and a dopant; forming cladding from the cladding composition around a core, the core comprising a core polymer; and causing diffusion of the dopant into the core such that the dopant has a continuous concentration gradient, according to which concentration gradient the concentration of the dopant increases with radial distance from a centre of the core. The dopant is a compound having a refractive index which is lower than a refractive index of the core polymer. By distributing the dopant such that the dopant concentration is lowest at the centre of the core, the optical attenuation of the graded-index polymer optical fibre may be reduced. Also provided is a graded-index polymer optical fibre obtainable by the method.

    COMMUNICATION IN A SWITCHING NETWORK
    8.
    发明申请
    COMMUNICATION IN A SWITCHING NETWORK 有权

    公开(公告)号：US20220345226A1

    公开(公告)日：2022-10-27

    申请号：US17763158

    申请日：2020-09-16

    申请人： Microsoft Technology Licensing, LLC

    发明人： Kai SHI ,  Paolo COSTA ,  Hitesh BALLANI ,  Istvan HALLER ,  Daniel Jonathan Finchley CLETHEROE ,  Sophie Gloria LANGE ,  Raphael Eric Alfred BEHRENDT ,  Foteini KARINOU ,  Krzysztof JOZWIK

    IPC分类号： H04B10/69 ,  H04B10/508 ,  H04B10/516

    摘要： A switching network for effecting point-to-point communication between nodes has a time-varying switching configuration, which causes successive activation and deactivation of multiple channels of the switching network, a first of the channels connecting, when activated, a transmitter node and a first receiver node, and a second of the channels connecting, when activated, the transmitter node and a second receiver node. In a training phase, a method comprises: transmitting from the transmitter node via each channel a known training signal, to cause each receiver node to receive a distorted training signal, using the first distorted training signal and knowledge of the first known training signal to determine respective one or more transmit-side equalizer (EQ) coefficients for each channel, and storing, in memory accessible to the transmitter node, the first transmit-side EQ coefficients, in association with each channel, for use in conducting scheduled communications over the switching network in a communications phase.