A Reconfigurable Optical Add-Drop Multiplexer Based on Liquid Crystal on Silicon with m×n Ports

Abstract

The invention discloses a reconfigurable optical add drop multiplexer (ROADM) based on M*N ports of silicon substrate liquid crystal. The ROADM comprises an optical fiber collimator input array with M ports, a spherical reflector, a body optical grating, an LCoS Opto-VLSI chip, a lens and an optical fiber collimator output array with N ports. The ROADM based on M*N ports of LCoS is realized. An optical system inside the equipment is unique in design, exquisite in structure, and good in function, uses the high-density scoring body grating as a dispersion element, adopts a method that phase gratings of different two-dimension orientations are loaded on an LCoS chip, and realizes efficient and flexible assignments of a large scale optical integrated chip on an incident wave length passage through changing the period of the grating and grating orientation modulation light beam phases. The ROADM has a high port number and optimized spectrum flexibility, has the functions of dispersion adjustments, pulse shaping and the like, and can conduct remote control and upgrade conveniently through software.

Description

technical field [0001] The invention relates to optical communication and optical network technology, in particular to a reconfigurable optical add-drop multiplexer based on silicon-based liquid crystal with M×N ports. Background technique [0002] Since the beginning of the 21st century, with the wide application of Dense Wavelength Division Multiplexing (DWDM) technology and the huge growth of optical fiber transmission capacity, Synchronous Digital Hierarchy (SDH) technology has long been overwhelmed, building a next-generation intelligent system based on wavelength switching The all-optical communication network has gradually become an important consensus in the field of communication research and industry. The all-optical communication network has many significant advantages such as low investment and operation cost, high reliability, low power consumption, strong scalability, flexible networking, intelligent and dynamic configuration of network resources, and transpare...

AI Technical Summary

Problems solved by technology

Although the ROADM technology of the LCoS-based Opto-VLSI processor chip has many significant advantages such as high channel count, spectral flexibility, dispersion adjustment and pulse shaping, and many other significant advantages, such as remote upgrades can be easily performed by software, but due to its Due to the complexity of optical system design itself, LCoS-based ROADMs in the world still use 1×N port design so far.

Restricted by basic elements such as the size of optical components such as lenses and optical path design, the adoption of this 1×N port technical solution greatly limits the number of ports that can be realized by an LCoS-based ROADM

At present, the highest level of commercialized ROADM (WSS) using this technology is only 1×23 ports, and there are great technical difficulties in further increasing the number of ports.

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