Wavelength selective switch and related device

Abstract

The embodiment of the invention discloses a wavelength selection switch. The wavelength selection switch comprises an input optical fiber collimation array and an output optical fiber collimation array, and the relay lens is located between the first exchange engine and the second exchange engine. A first lens group comprises A lenses, the second lens group comprises B lenses, A and B are naturalnumbers greater than or equal to 2, the first lens group is connected with the first exchange engine and the relay lens, the second lens group is connected with the relay lens and the second exchangeengine, and both the first lens group and the second lens group comprise lenses with curvatures in the dispersion direction; and an output fiber collimation array comprises a plurality of output ports. Two or more lens groups are arranged between exchange engines. The filtering cost of the wavelength selection switch is reduced, and the filtering bandwidth of the wavelength selection switch is improved.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to a wavelength selective switch and related devices. Background technique [0002] With the rapid growth of video and cloud services, operators are particularly concerned about the flexibility of optical network construction and the reduction of optical network construction and operation and maintenance costs. There are more and more directional dimensions (or transmission paths) that network nodes need to cross-connect, and operators can remotely and automatically switch dimensions by using a reconfigurable optical add-drop multiplexer (ROADM) etc., to replace the previous way of manually going down to the site to replace the optical fiber connection, so as to meet the needs of network dynamic connection. In order to meet the high-efficiency and flexibility requirements of high-speed optical communication networks, ROADM, which is the core of network cross...

AI Technical Summary

Problems solved by technology

However, the filtering effect of the switching engine causes the optical signal to degrade the signal quality every time it passes through a switching engine. The filtering effect is particularly obvious in the case of cascading multiple switching engines, which will seriously reduce the channel quality.

Images