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Bulk optical interferometer

A technology of interferometer and optical interference, which is applied in the field of optical interferometer and can solve the problems of high cost and non-availability

Inactive Publication Date: 2006-12-06
LUMENTUM OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional demultiplexing filters, such as color separation filters, do not have the ability to separate such closely spaced channels without significant channel crosstalk without complex and costly modifications

Method used

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  • Bulk optical interferometer
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Embodiment Construction

[0027] The interleaver 10 according to the invention is based on a Mach-Zehnder interferometer (MII), into which beams can be injected or exited through one or more of the four ports 11 , 12 , 13 and 14 . Each port includes a collimating / focusing lens 16 optically coupled to a ferrule 17 surrounding one end of a fiber optic waveguide 18 . In our discussion, for the sake of convenience and brevity, we assume that light is launched into the crossbar 10 through the first port 11 and output through the second and third ports 12, 13, respectively. However, those skilled in the art understand that there are other feasible combinations, including: input through the second and / or third ports 12 and 13 respectively, and output through the first and / or fourth ports 11 and 14 respectively.

[0028] A typical input beam 20 is a Dense Wavelength Division Multiplexed (DWDM) signal comprising many wavelength channels, the beam 20 is launched through the first port 11 and split by a beam spli...

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Abstract

The present invention is one light cross multiplexer based on the Mach Zehnder interferometer, and the light cross multiplexer may be used in the light channel in WDM and DWDM light network. The light channel cross multiplexer / demultiplexer is combined with WDM and DWDM channel group for network transmission, and / or WDM and DWDM signal is separated into channel group favorable to subsequent demultiplexing. The present invention has cross multiplexer with two annular resonators as phase shifters in the two arms and this provides wide pass band and cut-off band for flatheaded wavelength response.

Description

[0001] Cross-references to related patent applications [0002] This is the first application of the present invention. technical field [0003] The invention relates to an optical interferometer, in particular to a Mach-Zehnder (Mach-Zehnder) interferometer (MZI)-based, used as a wavelength channel interleaver (interleaver) / de-interleaver (de-interleaver) -interleaver) bulk optical interferometer. Background technique [0004] As an interface between devices suitable for signals with the first wavelength channel spacing and devices suitable for signals with the second wavelength channel spacing, the optical cross multiplexer has become a A popular tool. In the past, 200GHz channel spacing was the common spacing, but as the need for increased bandwidth grew, 100GHz channel spacing became a standard. In the next generation of communication networks, channel spacing of 50GHz or even 25GHz will become common. However, conventional demultiplexing filters, such as color sep...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293H04J14/02H04J14/06G02B6/26G02B6/27
Inventor 曾和平梁丰吴立凌纪武
Owner LUMENTUM OPERATIONS LLC