公开(公告)号：US20190319710A1

公开(公告)日：2019-10-17

申请号：US16453743

申请日：2019-06-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lingjie WANG ,  Enyu ZHOU ,  Sulin YANG ,  Zhenxing LIAO

IPC: H04B10/50 ,  G02B27/28

Abstract: A transmitter optical subassembly is disclosed including a substrate and a direct modulated laser disposed on the substrate. A single-stage isolator, a polarization direction rotator, and an optical branching filter are disposed side by side on the substrate in a light propagation direction. The polarization direction rotator can adjust linearly polarized light to P-polarized light, the optical branching filter includes an optical splitter subassembly and a filter subassembly, and an optical splitter film in the optical splitter subassembly is an optical splitter film with P polarization. The polarization direction rotator adjusts the incident linearly polarized light to the P-polarized light, and the optical splitter film in the optical branching filter is the optical splitter film with P polarization; all P-polarized light with single polarization can pass through the optical branching filter, without causing any polarization loss or two peaks.

公开(公告)号：US20180299618A1

公开(公告)日：2018-10-18

申请号：US16016402

申请日：2018-06-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jing HU ,  Enyu ZHOU ,  Zhiguang XU

IPC: G02B6/12 ,  H04B10/27

CPC classification number: G02B6/12011 ,  G02B6/12016 ,  G02B6/293 ,  G02B6/34 ,  G02B2006/12038 ,  G02B2006/12061 ,  G02B2006/12107 ,  G02B2006/12109 ,  G02B2006/12164 ,  H04B10/27 ,  H04J14/02

Abstract: An arrayed waveguide grating includes an input/output waveguide 1, an input/output waveguide 2, a slab waveguide, an arrayed waveguide 1, a reflection zone 1, an arrayed waveguide 2, and a reflection zone 2. The input/output waveguide 1 and the input/output waveguide 2 are located on a same side of the slab waveguide, and are coupled to the slab waveguide. The reflection zone 1 is configured to reflect a light wave in a first band, and to transmit a light wave in a second band. The reflection zone 2 is configured to reflect the light wave in the second band. It is implemented that a single arrayed waveguide grating outputs light waves with different adjacent channel wavelength spacings, and a quantity of devices used in a system in which an uplink adjacent channel wavelength spacing and a downlink adjacent channel wavelength spacing are asymmetrical is further reduced.

公开(公告)号：US20220247507A1

公开(公告)日：2022-08-04

申请号：US17727492

申请日：2022-04-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Enyu ZHOU ,  Lei JING ,  Xiaofei ZENG ,  Huafeng LIN

IPC: H04J14/02

Abstract: This application provides a port detection method, an optical network device, and a passive optical network system, to quickly and accurately detect a port connected to an ONU, and improve efficiency of determining the port connected to the ONU. The method includes: an optical line terminal sends optical signals corresponding to all of N wavelengths to at least one optical network unit, where the N wavelengths are different from each other, and N is a positive integer; the OLT receives optical power values that are of the optical signals corresponding to all of the N wavelengths and that are sent by a first ONU, where the first ONU is any one of the at least one ONU; and the OLT determines, bases on the optical power values of the optical signals corresponding to all of the N wavelengths, information about an optical splitter port corresponding to the first ONU.