Multi-port TBWSS based on LCOSs

Abstract

The invention discloses a multi-port TBWSS based on LCOSs, and relates to the field of optical communication. The multi-port TBWSS comprises a 1*N TBWSS device and an optical fiber collimator array set composed of N optical fiber collimation arrays. Each optical fiber collimation array is provided with an input port and M output ports. The TBWSS device outputs optical signals to the input ports of the optical fiber collimation arrays, and the optical signals output through the optical fiber collimation array set are converted by polarization converting units into light in the same polarization state. Light spots projected to a raster in the X direction are large enough through a first cylindrical lens in the X direction and a second cylindrical lens in the X direction, the light with different wavelengths is diffracted through the raster, and diffracted light beams at different angles in the X direction are collimated by a third cylindrical lens in the X direction to be projected to the LCOSs; light beams in the Y direction pass through a cylindrical lens array in the Y direction and then are collimated through the third cylindrical lens in the X direction to be projected to the LCOSs. According to the multi-port TBWSS, the number of the output ports of the single TBWSS is increased, and the system power consumption and the cost are reduced.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a LCOS (Liquid Crystal On Silicon, liquid crystal on silicon)-based multi-port variable bandwidth wavelength selective switch. Background technique [0002] An intelligent optical network is mainly composed of a series of highly flexible system equipment. Among them, TBWSS (Tunable Bandwidth Wavelength Selective Switch, variable bandwidth wavelength selective switch) is the core module in the intelligent optical network system, which can realize the add, drop and pass-through of wavelengths through software configuration, and the bandwidth is flexible and adjustable. [0003] Such as figure 1 As shown, it is a traditional TBWSS based on 1×N (1 is the number of input ports, and N is the number of output ports), including a fiber collimator array 301, a polarization conversion unit 302, a first cylindrical lens 303 in the X direction, and a second cylindrical lens in the X dir...

AI Technical Summary

Problems solved by technology

[0005] However, with the development of optical communication systems to higher-dimensional mesh systems, due to the limited number of 1×N TBWSS output ports, the industry currently has a maximum of 20 output ports. When a large number of output ports are required, one 1 ×N TBWSS and N 1×M TBWSS are cascaded, where M and N are the output ports of TBWSS, which greatly increases the number of TBWSS in the entire system, and the power consumption and cost increase accordingly

Images