Optical switch and optical crossconnect apparatus

Abstract

The invention provides an optical switch and an optical cross-connection device. The optical cross-connection device can reduce the scale of the device and has scalability. The optical cross-connect device includes: a first optical switch and a second optical switch with k-input and k-output ports, a third optical switch capable of bidirectional transmission with k-input and k-output, 2k first optical gyrators, 2k The second optical gyrator and 2k selection switches, the 1st to kth interfaces are connected to each other through the first optical switch, the k+1 to 2kth interfaces are connected to each other through the second optical switch, and the 1st to kth interfaces are connected to each other through the second optical switch. The third optical switch is connected to any one of the k+1th to 2kth interfaces with each other.

Description

Technical field [0001] The present invention relates to an optical transmission system and an optical network used in a core network or a prefecture network covering other countries or the whole of Japan, and more particularly to an optical cross-connect device that performs path switching or band management of optical signals. Background technique [0002] In recent years, with the rapid growth of data communication representing the Internet, the transmission capacity of communication networks has become larger. Now that optical transmission has become practical, time division multiplexing technology and optical wavelength division multiplexing technology are used to increase the transmission capacity. For example, a transmission device capable of transmitting 10 Gbits of data per second per channel, and the following point-to-point wavelength division multiplexing transmission device have become practical. The wavelength division multiplexing transmission device uses a single o...

AI Technical Summary

Problems solved by technology

In the 2D type, the reflectors are arranged in a grid in two dimensions vertically and horizontally, and the light path is switched according to whether a reflector is inserted in the optical path of the optical signal. Although the control of the reflectors is relatively simple in this 2D type, the number of reflectors and the input The square of the number of output ports increases proportionally, so it is generally difficult to form an optical switch with a scale of more than 32 inputs and 32 outputs

In the method of using one large-scale optical switch, there is a problem that the optical switch cannot be added according to the scale of the node

In addition, in the current situation, due to the viewpoint of manufacturing technology, cost, etc., the scale of switches sold in the market is limited. For example, 3D MEMS switches are generally about 64×64 to 128×128

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