A Wavelength Selective Switch Based on lcos

A wavelength selective switch, liquid crystal on silicon technology, applied in the field of optical communication, can solve the problems of entry, system performance impact, optical link crosstalk, etc.

CN111221081BActive Publication Date: 2021-11-19HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-11-19

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Abstract

The embodiment of the present invention discloses a WSS. The output port arrangement scheme of the optical fiber array of the WSS is that the centers of the output ports are arranged along a curve or along a combination line including line segments, and the centers of any two output ports on the curve or combination line The connected straight line cannot pass through the input port; the light beam received from the input port is diffracted to the output port through the LCoS panel, and the straight line passed by each order of diffraction generated by the diffraction intersects the curve or line segment, and there is only one intersection point. The WSS provided by the embodiment of the present invention can effectively improve the number of output ports and the isolation performance, and has strong practicability.
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Description

technical field

[0001] The present application relates to the field of optical communication, in particular to a wavelength selective switch based on an LCoS (Liquid Crystal on Silicon, liquid crystal on silicon) optical switching engine. Background technique

[0002] With the rapid growth of network traffic and bandwidth, operators have increasingly urgent demands on the intelligent scheduling function of the underlying WDM network, which has led to ROADM (Reconfigurable Optical Add-Drop Multiplexer, Reconfigurable Optical Add-Drop Multiplexer ) is gradually adopted by more and more high-end operators' networks. After ROADM is introduced into the network, operators can quickly provide wavelength-level services, which facilitates network planning, reduces operating expenses, facilitates maintenance, and reduces maintenance costs.

[0003] ROADM requires a considerable amount of WSS (Wavelength selective switch, wavelength selective switch) to optically interconnect the inpu...

Examples

Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The invention provides an LCoS-based wavelength selective switch, which can effectively suppress crosstalk diffracted light. It is worth noting that the "connection" in the embodiments of the present invention refers to the connection on the optical path. Those skille...