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Wavelength selection switch

A wavelength selective switch and switch technology, applied in the field of optical communication, can solve problems such as separation and signal transmission influence

Active Publication Date: 2013-04-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Since it cannot be separated from the normal signal (because the wavelength of the crosstalk signal is the same), it will seriously affect the signal transmission

Method used

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Embodiment Construction

[0038] In the prior art, there is no crosstalk interference in the N×1 (N>=2) wavelength selective switch, but in order to meet the needs of the application, it is necessary to realize the N×M (N>=2, M>=2) wavelength selective switch . If an N×M wavelength selective switch is constructed by cascading a plurality of N×1 wavelength selective switches, the crosstalk effect caused by the common M×N wavelength selective switch structure can be avoided. like figure 2 As shown, it is an example of constructing an N×M (N input, M output) wavelength selective switch through an optical splitter and a plurality of N×1 wavelength selective switches, but in this configuration, its structure Complicated, N×M complete connections are made between the optical splitter and the N×1 wavelength selective switch, requiring N×M connecting fibers and M N×1 wavelength selective switches. Since the N×1 wavelength selective switch is commercially available, the price is still expensive, so this solu...

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PUM

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Abstract

Embodiment of the invention provides a wavelength selection switch, which suppresses crosstalk by adjusting the polarity of the optical signal based on the structure of the covnentional 1 * N wavelength selection switch, so that the input optical signals of different paths have different polarities when being incident on a switch engine, and crosstalk between the different paths of light can be suppressed by filtering the polarity for the light signal reflected by the switching engine. The inhibition of crosstalk interference in the M * N ( N input optical fiber ports, M output optical fiber ports; or M input optical fiber ports, N output optical fiber ports, wherein M and N are natural numbers greater than or equal to 2) wavelength selection switch can be achieved.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a wavelength selective switch. Background technique [0002] In recent years, wavelength division multiplexing (Wavelength division multiplexing, WDM) technology has been more and more widely used in optical transmission networks at all levels, and its network topology has also changed from simple ring and tree structures to more complex mesh structures. structural evolution. At the same time, with the rapid development of Internet Protocol (IP) network, broadband, Internet TV (Internet Protocol Television, IPTV), next generation network (Next generation network, NGN), third-generation mobile communication technology (3rd-generation, 3G) and other new services are widely used, and the type of network services is also transitioning from circuit-switching services mainly based on Time Division Multiplexing (TDM) services to data services mainly based on IP. [0003] The rapid...

Claims

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Application Information

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IPC IPC(8): G02B6/35G02B6/293
CPCG02B6/293H04J14/02G02B6/29313G02B6/2766G02B6/2931G02B6/3512G02B6/356G02B6/3594H04Q11/0005H04Q2011/003
Inventor 刘宁
Owner HUAWEI TECH CO LTD
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