Optical transceiver with common end module

Patent metadata

Field	Value
Publication number	US-10230486-B2
Application number	US-201715783382-A
Country	US
Kind code	B2
Filing date	Oct 13, 2017
Priority date	Apr 15, 2015
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

An optical transceiver and a network device are provided. The optical transceiver includes a common end module and two data submodules. The common end module includes a multi-carrier light source, a wavelength division multiplexer, a wavelength division demultiplexer, an external optical interface, and two first beam splitters. Each data submodule includes a second beam splitter, an optical/electrical signal modulator, and an optical receiver. According to the optical transceiver and the network device, a high-capacity optical transceiver with a single optical interface can be implemented, so that optical interface management complexity is reduced, and a fiber resource is reduced.

First claim

What is claimed is:

1. An optical transceiver, comprising:
a common end module comprising:
a plurality of first beam splitters, each comprising a first port and a second port;
a multi-carrier light source configured to generate a plurality of optical signals, the multi-carrier light source separately coupled to each of the first ports of the plurality of first beam splitters;
a wavelength division multiplexer separately coupled to each of the second ports of the plurality of first beam splitters;
a wavelength division demultiplexer; and
an optical interface configured to split a first optical signal to produce a plurality of second optical signals via the wavelength division demultiplexer; and

a plurality of data submodules coupled to the wavelength division demultiplexer, the plurality of data submodules corresponding to a data capacity of the optical transceiver, the plurality of data submodules serviceable by the common end module, each of the plurality of data submodules comprising:
a second beam splitter coupled to one of the plurality of first beam splitters and configured to receive each of the plurality of optical signals from the each of the plurality of first beam splitters;
an optical/electrical signal modulator comprising an input port and an output port, the input port and the output port being coupled to the second beam splitter, the optical/electrical signal modulator configured to modulate a to-be-output electrical signal and an optical signal of the second beam splitter to produce a to-be-output optical signal and send to the wavelength division multiplexer via the one of the plurality of first beam splitters, then output using the optical interface; and
an optical receiver configured to perform optical/electrical detection on one of the plurality of optical signals from the optical interface via the wavelength division demultiplexer.

2. The optical transceiver of claim 1 , wherein a quantity of the plurality of first beam splitters is greater than or equal to a quantity of the plurality of data submodules, the multi-carrier light source is configured to generate the plurality of optical signals of at least two wavelengths, the each of the plurality of optical signals is input to the second beam splitter in each of the plurality of data submodules, the optical/electrical signal modulator is configured to modulate the to-be-output electrical signal and an optical signal in the second beam splitter to the to-be-output optical signals, the to-be-output optical signal is input to the wavelength division multiplexer using the second beam splitter to produce a to-be-sent optical signal, the to-be-sent optical signal is output using the optical interface, each of the plurality of second optical signals received by the optical interface is split into at least two to-be-received optical signals using the wavelength division demultiplexer, the each of the plurality of second optical signals is input to the optical receiver of a respective data submodule, and the optical receiver of the each of the plurality of data submodules is configured to perform optical/electrical detection on the each of the plurality of optical signals, to output a to-be-received electrical signal.

3. The optical transceiver of claim 2 , wherein the each of the plurality of the first beam splitters and the second beam splitter are polarization beam splitters, the multi-carrier light source is configured to generate linearly polarized light of at least two wavelengths, and each of the plurality of the first beam splitters and the second beam splitter are coupled to a polarization maintaining optical fiber.

4. The optical transceiver of claim 3 , wherein the polarization beam splitters are bidirectional multiplex polarization beam splitters.

5. The optical transceiver of claim 1 , wherein the optical/electrical signal modulator comprises a Mach-Zehnder modulator or an electro-absorption modulator.

6. The optical transceiver of claim 1 , wherein the optical interface is a single optical interface.

7. The optical transceiver of claim 1 , further comprising an internal optical interface comprising a plurality of optical interfaces, and a third port of the each of the plurality of first beam splitters coupled to a first port of the second beam splitter by the internal optical interface.

8. The optical transceiver of claim 1 , further comprising an optical interface and electrical interface connector comprising a plurality of internal optical interfaces corresponding to the plurality of first beam splitters, each of the plurality of internal optical interfaces comprising: a corresponding to-be-output electrical signal interface and a corresponding to-be-received electrical signal interface, a third port of the each of the plurality of first beam splitters coupled to a first port of the second beam splitter in the data submodule by the internal optical interface, the optical/electrical signal modulator of the each of the plurality of data submodules coupled to the to-be-output electrical signal interface corresponding to the internal optical interface coupled to the second beam splitter, and the optical receiver in each data submodule coupled to the to-be-received electrical signal interface corresponding to the internal optical interface coupled to the second beam splitter.

9. The optical transceiver of claim 1 , wherein the optical transceiver is disposed on a cable clip.

10. A network device, comprising:
a cable clip; and
an optical transceiver disposed on the cable clip, the optical transceiver comprising:
a common end module comprising:
a plurality of first beam splitters, each comprising a first port and a second port;

a multi-carrier light source configured to generate a plurality of optical signals, the multi-carrier light source separately coupled to each of the first ports;
a wavelength division multiplexer separately coupled to each of the second ports of the plurality of first beam splitters;
a wavelength division demultiplexer; and
an optical interface to produce a plurality of second optical signals via the wavelength division demultiplexer; and

a plurality of data submodules coupled to the wavelength division demultiplexer, the plurality of data submodules corresponding to a data capacity of the optical transceiver, the plurality of data submodules serviceable by the common end module, wherein each of the plurality of data submodules comprising:
a second beam splitter coupled to one of the plurality of first beam splitters and configured to receive each of the plurality of optical signals from the each of the plurality of first beam splitters;
an optical/electrical signal modulator, an input port and the output port of the optical/electrical signal modulator being coupled to the second beam splitter, the optical/electrical signal modulator configured to modulate a to-be-output electrical signal and an optical signal of the second beam splitter to produce a to-be-output optical signal and send to the wavelength division multiplexer via the one of the plurality of first beam splitters, then output using the optical interface; and
an optical receiver configured to perform optical/electrical detection on one of the plurality of plurality of optical signals from the optical interface via the wavelength division demultiplexer.

11. A method of an optical transceiver comprising:
generating, by a multi-carrier light source of a common end module, a plurality of optical signals, the multi-carrier light source separately coupled to respective first ports of a plurality of first beam splitters of the common end module;
splitting, by an optical interface of the common end module, a received optical sign

Assignees

• Huawei Tech Co Ltd

Inventors

• Man Jiangwei
• Song Xiaolu
• Zeng Li

Classifications

• H04B10/506

  Multiwavelength transmitters · CPC title

• H04B10/40 Primary

  Transceivers · CPC title

• H04Q11/0005

  Switch and router aspects · CPC title

• H04Q2011/0022

  using fibre gratings · CPC title

• H04Q2011/0083

  Testing; Monitoring · CPC title