An optical switch supporting large-scale, all-optical interconnection

Abstract

The invention discloses an optical switch supporting large-scale and all-optical interconnection. The optical switch comprises interfaces in the east, west, north and south; N optical fiber interfaces are provided at each direction so as to be used for interconnection between optical switches. The optical switch also comprises the following components: (1) four completely-identical erbium-doped fiber amplifiers (EDFA); (2) N+1 5:5 fiber beam splitters (5:5 splitter); (3) a wavelength division multiplexer (MUX); (4) a wavelength division demultiplexer (DEMUX); (5) an optical fiber coupler (Coupler); (6) 2 N / 2*1 wavelength selective switches (WSS) and 2 N*1 wavelength selective switches; (7) M bi-directional optical fiber interfaces (fiber) which are connected with a ToR switch through optical fibers; (8) 2 (N-2) completely-identical 1:N optical fiber beam splitters (1:N splitter); and (9) a control port (console). A network formed based on the optical switch can support large-scale data center ToR interconnection; point-to-point optical links can be built between any ToRs; network transmission delay can be decreased; and the flexibility of an optical switching network can be improved.

Description

technical field [0001] The invention belongs to the field of network architecture, in particular to an optical switch capable of supporting a large-scale data center network. Background technique [0002] With the development of technologies such as cloud computing and big data, the scale of data centers is getting larger and larger. Traditional data center networks mainly adopt a tree network topology, which faces problems such as oversubscription and network congestion. In recent years, research on dynamic networks based on optical switches has increased. Optical switches can dynamically change the connection mode of the network and establish links according to requirements, which greatly reduces the deployment cost of the network and improves the performance of the network. [0003] Currently commercial optical switches are mainly optical switches based on micro-electromechanical systems (Micro-electromechanical System, MEMS) and wavelength selective switches (Wave Sele...

AI Technical Summary

Problems solved by technology

The optical switches based on WSS and wavelength division multiplexing technology adopted by CoAdna in the United States are connected through 2D-Mesh, which can support large-scale Top of Rack (ToR) interconnection, but in different directions of 2D-Mesh The ToR communication on the network must go through photoelectric conversion and enter ToR forwarding, and cannot directly establish a point-to-point optical link

This method increases the delay of network transmission and also limits the flexibility of optical switching network

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