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    APPARATUS AND METHODS FOR AN OPTICAL MULTIMODE CHANNEL BANDWIDTH ANALYZER
    5.
    发明公开
    APPARATUS AND METHODS FOR AN OPTICAL MULTIMODE CHANNEL BANDWIDTH ANALYZER 审中-公开

    公开(公告)号：EP4027537A1

    公开(公告)日：2022-07-13

    申请号：EP22150550.6

    申请日：2022-01-07

    申请人： Panduit Corp.

    发明人： Castro, Jose M. ,  Pimpinella, Richard J. ,  Kose, Bulent ,  Huang, Yu ,  Jia, Fei

    IPC分类号： H04B10/073 ,  H04B10/2581

    摘要： A test apparatus has at least one optical source, a high-speed photodetector, a microcontroller or processor, and electrical circuitry to power and drive the at least one optical source, photodetector, and microcontroller or processor and for measuring the frequency response of a multimode optical fiber under test. The test apparatus can utilize an optical pulse waveform with a light adapter to measure of the channel under test. It can also uses a correction method to de-embeed a chromatic bandwidth of the source from the encircled flux modal chromatic bandwidth. The correction method can use correction functions obtained for different type of VCSELs to estimate the optical channel bandwith when used with VCSEL transceivers.

    MULTI-WAVELENGTH LASER
    7.
    发明公开
    MULTI-WAVELENGTH LASER 审中-公开

    公开(公告)号：EP3855646A1

    公开(公告)日：2021-07-28

    申请号：EP19870386.0

    申请日：2019-09-11

    申请人： HUAWEI TECHNOLOGIES CO., LTD.

    发明人： ZHAO, Jialin ,  GUI, Chengcheng ,  FU, Shengmeng

    IPC分类号： H04B10/25 ,  H04B10/2581

    摘要： A multi-wavelength laser includes a reference wavelength-tunable laser, N-1 secondary wavelength-tunable lasers, N beam splitters, a phase modulator, and N-1 frequency difference detection apparatuses. The reference wavelength-tunable laser is connected to one beam splitter, the beam splitter includes two output ports, and one of the output ports is connected to the phase modulator. The phase modulator is separately connected to the N-1 frequency difference detection apparatuses. The N-1 secondary wavelength-tunable lasers one-to-one correspond to remaining N-1 beam splitters and the N-1 frequency difference detection apparatuses. The secondary wavelength-tunable laser is connected to a corresponding beam splitter, the corresponding beam splitter includes two output ports, and one of the output ports is connected to a corresponding frequency difference detection apparatus. N is a positive integer not less than 2. A multi-wavelength optical signal generated by the phase modulator has a precise frequency spacing. Therefore, compared with an existing multi-wavelength laser, the multi-wavelength laser disclosed in this application has higher frequency offset precision.