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公开(公告)号：US10027417B2
公开(公告)日：2018-07-17
申请号：US15461263
申请日：2017-03-16
Applicant: Huawei Technologies Co., Ltd.
IPC: H04B10/516 , H04B10/50 , H04B10/58
Abstract: Embodiments of the present invention provide an optical signal modulation apparatus and system. The optical signal modulation apparatus includes: a laser, where each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the laser is configured to generate at least two optical signals, where at least one of the optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the optical signals is sent to at least one EAM by using the at least one second output end, and each EAM is configured to modulate a received electrical signal onto the received optical signal for outputting. The apparatus has a simple structure and less complex production.
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公开(公告)号：US10763637B2
公开(公告)日：2020-09-01
申请号：US16157807
申请日：2018-10-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yin Wang
Abstract: Embodiments of the present application provide an optical signal generation device. The device includes a laser, a first modulator, a second modulator, a first adjustment module, and a beam combiner. The laser is configured to: output a first optical signal to the first modulator, and output a second optical signal to the second modulator. The two modulators are separately configured to: receive an optical signal and a loaded electrical modulation signal, and modulate the optical signal based on the electrical modulation signal, to obtain a first modulated optical signal and a second modulated optical signal. The first adjustment module is further configured to adjust a phase of the modulated optical signal or an optical path to the beam combiner. The beam combiner is configured to: combine the first modulated optical signal obtained after the adjustment and the second modulated optical signal, and output a combined signal.
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公开(公告)号：US09900107B1
公开(公告)日：2018-02-20
申请号：US15728279
申请日：2017-10-09
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H04B10/6164 , H04B10/61 , H04J14/06
Abstract: Embodiments of the present disclosure disclose a coherent receiver, including: a frequency offset estimation unit and a frequency offset compensation unit, where the frequency offset estimation unit is configured to receive signal light and local oscillator light, where the signal light is received by a first photoelectric detector, and a first intensity value is obtained, the signal light is received by a second photoelectric detector, and a second intensity value is obtained, the local oscillator light is received by a third photoelectric detector, and a third intensity value is obtained, and the local oscillator light is received by a fourth photoelectric detector, and a fourth intensity value is obtained; and the frequency offset compensation unit is configured to obtain a frequency offset value between the signal light and the local oscillator light according to a difference between a first ratio and a second ratio.
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公开(公告)号：US20180034553A1
公开(公告)日：2018-02-01
申请号：US15728279
申请日：2017-10-09
Applicant: Huawei Technologies Co., Ltd.
IPC: H04B10/61
CPC classification number: H04B10/6164 , H04B10/61 , H04J14/06
Abstract: Embodiments of the present disclosure disclose a coherent receiver, including: a frequency offset estimation unit and a frequency offset compensation unit, where the frequency offset estimation unit is configured to receive signal light and local oscillator light, where the signal light is received by a first photoelectric detector, and a first intensity value is obtained, the signal light is received by a second photoelectric detector, and a second intensity value is obtained, the local oscillator light is received by a third photoelectric detector, and a third intensity value is obtained, and the local oscillator light is received by a fourth photoelectric detector, and a fourth intensity value is obtained; and the frequency offset compensation unit is configured to obtain a frequency offset value between the signal light and the local oscillator light according to a difference between a first ratio and a second ratio.
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