Optical switching system based on arrayed waveguide grating

Abstract

The invention discloses an optical switching system based on arrayed waveguide gratings, which comprises an input unit, a switching unit and an output unit, wherein the switching unit comprises two groups of arrayed waveguide gratings, the preposed first group of arrayed waveguide gratings is composed of N M*M periodic arrayed waveguide gratings, the postposed second group of arrayed waveguide gratings is composed of M N*N periodic arrayed waveguide gratings; the output port of the first grating of the first group of arrayed waveguide gratings is sequentially linked with the first input ports of various gratings of the second group of arrayed waveguide gratings respectively; the output port of the second grating of the first group of arrayed waveguide gratings is sequentially linked with the second input ports of various gratings of the second group of arrayed waveguide gratings respectively; by parity of reasoning, the output port of the N-th grating of the first group of arrayed waveguide gratings is sequentially linked with the N-th input ports of various gratings of the second group of arrayed waveguide gratings respectively. Through the switching system, large scale port numbers are realized and response speed of nanosecond level is realized at the same time, and the system has the advantages of compact structure, easiness in operation and control, flexibility in use and the like, so that the system is particularly suitable for high-speed switching of an all-optical switching system.

Description

technical field [0001] The invention belongs to the technical field of optical network communication, and more specifically relates to an optical switching system based on an arrayed waveguide grating. Background technique [0002] At present, Internet data traffic and video communication services are showing explosive growth trends, which in turn has greatly increased the energy consumption of electrical switches and routers in traditional network electrical switching systems. The traditional electrical switching system is a process of optical-electrical-optical conversion. The light is converted into an electrical signal to pass through the switch and then converted back into light. This process not only limits the communication capacity, but also causes time delay and energy consumption. In order to solve this problem, the optical switch structure in the all-optical switching system has been gradually applied to the communication network due to its advantages of large cap...

AI Technical Summary

Problems solved by technology

[0003] One of the important technologies currently used to construct optical switching systems is the optical MEMS method, which has a large number of ports, but the biggest disadvantage is that the switching time is slow, only on the order of milliseconds; in addition, based on semiconductor optical amplifiers (SOA) The optical switch technology of piezoelectric ceramics (PLZT) can achieve nanosecond switching speed, but the number of ports is limited to a small scale, currently only 16×16 and 4×4

Considering that the requirements of the optical switching system in the existing optical network nodes are getting higher and higher, it must have the characteristics of multi-port, fast response time, and large capacity, so the above-mentioned optical switching system can no longer meet the current actual needs

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