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Optical add-drop multiplexer, system thereof, and updating extension method therefor

A technology of optical add-drop multiplexing and expansion method, which is applied in the field of wavelength division multiplexing systems, and can solve the problems that OADM devices cannot achieve non-disruptive upgrades, limitations, etc.

Inactive Publication Date: 2007-07-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In order to solve the problem that other existing OADM devices in the ring network cannot achieve non-disruptive upgrade to multi-ring expansion except ROADM based on WSS technology, and at the same time to solve the problem that the multi-ring expansion capability of ROADM based on WSS technology is limited by the dimension of the device itself Problem, the present invention provides an optical add-drop multiplexing device, including an optical add-drop multiplexing device in a ring, and also includes: a line entrance optical path expansion device, a line exit optical path expansion device, and a line entrance optical path expansion device includes a pass-through port and Expansion port, the line exit optical path expansion device includes a pass-through port and an expansion port, the input port of the optical add-drop multiplexing device in the ring is connected to the pass-through port of the line entrance optical path expansion device, and the output port of the optical add-drop multiplexing device in the ring is connected to the line The through port of the exit optical path expansion device, the expansion port of the line entrance optical path expansion device and the expansion port of the line exit optical path expansion device are respectively used to connect the newly added functional units

Method used

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  • Optical add-drop multiplexer, system thereof, and updating extension method therefor
  • Optical add-drop multiplexer, system thereof, and updating extension method therefor
  • Optical add-drop multiplexer, system thereof, and updating extension method therefor

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Embodiment 1

[0054] This embodiment is an embodiment of an optical add / drop multiplexing device involved in the present invention. The line entrance optical path expansion device and the line exit optical path expansion device included in the FOADM of the present invention are optical couplers with the same power division ratio of each port. In this embodiment, the line entrance optical coupler is an optical splitter, and the line exit optical coupler is an optical combiner. In this embodiment, the optical splitter of the prior art is used with three ports, each of which is an input port. , a pass-through port and an extension port. In this embodiment, the optical combiner of the prior art has three ports, which are respectively an output port, a pass-through port and an expansion port. The FOADM input port is connected to the optical splitter Through port, the FOADM output port is connected to the pass-through port of the optical combiner, the input line is connected to the input port of t...

Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that the newly added functional unit OADM is replaced by WB, and the optical coupler with the same power division ratio of each port is replaced with an optical coupler with the same power division ratio of each port. WB and each port There are 2 optocouplers with the same power division ratio, so that the non-interrupted ring expansion and expansion of bidirectional transmission can be realized.

Embodiment 3

[0058] The difference between this embodiment and Embodiment 1 is that FOADM is replaced by ROADM, the newly added functional unit OADM is replaced by WSS, and the optical coupler with the same power division ratio of each port is replaced by an optical coupler with completely different power division ratio of each port. device.

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Abstract

The optical add-drop multiplexer aims to solve the inability of existing system to continuous upgrading and expanding, it comprises the input connected with the through hole of the optical circuit input expansion device, output connected with the optical circuit output connected with the optical expansion device, with the input and output optical expansion device used for its upgrading capacity expansion, with the expansion opening of the input and output expansion device connected to the newly added function unit, input circuit connected to the input of the optical circuit expansion device, so does the output circuit to realize the continuous upgrading and expansion requirement.

Description

technical field [0001] The invention relates to an optical fiber communication device, a system and an upgrade and extension method thereof, in particular to an optical add-drop multiplexing device, a system and an upgrade and extension method thereof, belonging to the technical field of wavelength division multiplexing systems. Background technique [0002] With the rapid development of data communication, modern communication systems have higher and higher requirements for communication capacity. Optical wavelength division multiplexing technology, as a multiplexing method to improve communication capacity in optical fiber communication, is more and more widely used. In the WDM system, as shown in Figure 1, there are four typical nodes: Optical Terminal Multiplexer-OTM, Optical Line Amplifier-OLA, Regenerator -REG), optical add-drop multiplexer (Optical Add-Drop Multiplexer-OADM). Among them, OLA and REG are optical relay nodes and electrical relay nodes respectively, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26H04J14/02
Inventor 陈娟张德江靳玉志
Owner HUAWEI TECH CO LTD