Optical staggered filtering device

Abstract

The invention relates to the field of optical communication, in particular to an optical interleaving filter used in a mixed-rate optical transmission system. The optical interleaved filtering device includes an optical waveguide arm, an optical waveguide microring, and a beam splitter. There are three coupling beam splitting points between the optical waveguide arm and the optical waveguide microring, and each coupling beam splitting point corresponds to a beam splitter, and three beam splitters The devices are respectively the first optical splitter, the second optical splitter, and the third optical splitter, and the second optical splitter and the third optical splitter are also connected through an optical waveguide arm; between the second optical splitter and the third optical splitter The arc length of the optical waveguide microring is the interference arm L1, the arm length of the optical waveguide arm between the second beam splitter and the third beam splitter is the interference arm L2, and the interference arm L2 is longer than the interference arm L1. The invention is used for optical signal transmission, and its beneficial effect is that the structure size is compact, it is beneficial to integrate with other optical circuits, and the channel bandwidth utilization rate can be effectively improved.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical interleaving filter used in a mixed-rate optical transmission system. Background technique [0002] With the rapid development of information technology, global communication networks are facing the demand for higher communication capacity. Dense Wavelength Division Multiplexing (DWDM) is an economical and effective technology for improving communication capacity in optical fiber communication. However, as the channel spacing continues to decrease, the demultiplexing filter of the system is faced with quite high performance requirements, which is very unfavorable for controlling system cost and improving system performance. An effective way to reduce this requirement is to use an optical interleave filter (Interleaver), because it can divide a group of optical signals with dense wavelength intervals into two groups of optical signals with doubled wavelength interva...

AI Technical Summary

Problems solved by technology

[0004] Currently existing optical interleave filters mainly have two disadvantages: on the one hand, the size of the currently implemented optical interleave filters is relatively large and difficult to integrate with other optical devices; some interleave filters require some expensive compensation devices to be able to Meet the system requirements, and the compensation device further increases the complexity of the design; the performance of most interleaved filters is not stable enough to be applied to the actual system

On the other hand, the current network upgrade has a mixed transmission system with different rates, which makes the bandwidth of the channel not fully utilized.

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