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    OPTICAL COMMUNICATION SYSTEMS, DEVICES, AND METHODS INCLUDING HIGH PERFORMANCE OPTICAL RECEIVERS
    3.
    发明公开
    OPTICAL COMMUNICATION SYSTEMS, DEVICES, AND METHODS INCLUDING HIGH PERFORMANCE OPTICAL RECEIVERS 审中-公开

    公开(公告)号：EP3937399A1

    公开(公告)日：2022-01-12

    申请号：EP21191896.6

    申请日：2018-03-21

    申请人： Bifrost Communications ApS

    发明人： JENSEN, Jesper ,  PEDERSEN, Bo

    IPC分类号： H04B10/61 ,  H04B10/64

    摘要： An optical receiver (30) comprising an optical combiner (40) for combining an optical signal carrying data having a center frequency with local oscillator light having a local oscillator frequency into a combined optical signal. A local oscillator (32) provides the local oscillator light whose frequency is controlled to be fixed proximate to the edge of the wavelength channel. A polarizing beam splitter (42) splits the combined optical signal and directs each component to an opto-electrical converter (36) which output electrical signals carrying the data at an offset frequency, which is the difference between the center frequency and the local oscillator frequency. The receiver bandwidth of the opto-electrical converters (36) are substantially similar to a wavelength channel bandwidth. The two electrical signals output by the opto-electrical converters (36) are directed to respective envelope detectors (48A, 48B), one inverting and one non-inverting, whose outputs are combined by a subtractor (46).