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Wavelength-selective optical switch

A technology of wavelength selectivity and wavelength selection, which is applied in the field of communication, can solve problems such as limiting the application scenarios of microring resonators, and achieve the effects of reducing control complexity, reducing polarization-related loss, and reducing distance difference

Active Publication Date: 2018-04-03
HUAWEI TECH CO LTD
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Problems solved by technology

This will limit the application scenarios of microring resonators in metro optical networks

Method used

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, 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 shall fall within the protection scope of the present invention.

[0048] figure 1 is a schematic structure diagram of a polarization-independent microring resonator in the prior art. The microring resonator 100 consists of two parts: a polarization sensitive working unit 110 and a polarization rotating mirror 120 . The polarization multiplexed optical signal includes TE mode optical signal and TM mode optical signal, and the input polarization multiplexed optical signal enters the polarization-independent microring reso...

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Abstract

The invention provides a wavelength-selective optical switch, which comprises a polarization beam-splitting unit and a wavelength selection unit. The wavelength selection unit includes a polarizationbeam splitting unit used for splitting an input light beam into a first polarized light beam and a second polarized light beam, transmitting the first polarized light beam to the input end of a firstgroup of micro-ring resonators and transmitting the second polarized light beam to the input end of a second group of micro-ring resonators. The first group of micro-ring resonators is used for coupling a first target beam in the first polarized light beam to the first group of micro-ring resonators, and outputting the first target beam output to a polarization beam-combining unit. The second group of micro-ring resonators is used for coupling a second target beam in the second polarized light beam to the second group of micro-ring resonators, and outputting the second target beam output to the polarization beam-combining unit. The polarization beam-combining unit is used for combining the first target beam and the second target beam. In this way, the polarization state conversion of the first polarized light beam and the polarization state conversion of the second polarized light beam are the same in number of times. The polarization-related loss is lowered.

Description

technical field [0001] The invention relates to the communication field, in particular to a wavelength selective optical switch in the communication field. Background technique [0002] With the application of dense wavelength division multiplexing (Dense Wavelength Division Multiplexing, "DWDM") technology in optical fiber communication systems and data center systems, all-optical switching has become a trend to meet the increasing bandwidth. In the DWDM system, each different optical wavelength carries a different optical signal, and the optical signals of different wavelengths are transmitted in the same optical fiber, realizing data communication with large capacity and low loss. The optical switch is the key device to realize the all-optical switching system, which can realize the routing selection, wavelength selection, optical cross-connection, self-healing protection and other functions of the all-optical layer. The optical switches that have been realized so far in...

Claims

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Application Information

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IPC IPC(8): G02B6/35
CPCG02B6/3594G02B6/35
Inventor 涂鑫
Owner HUAWEI TECH CO LTD
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