C and L waveband wavelength selecting switch, as well as implementation method and processing unit thereof

Abstract

The invention discloses a C and L waveband wavelength selecting switch, as well as an implementation method and a processing unit thereof, wherein the processing unit comprises an input-output fiber array, a polarization diversity element, a cylindrical surface reflector, a collimating lens array, a grating array and a programmable spatial light modulator; and a C waveband input light signal and an L waveband input light signal enter respectively the polarization diversity element through the input-output fiber array for polarization state adjustment, are reflected by the cylindrical surface reflector, collimated by the collimating lens array, expanded by the grating array according to different wavelengths, reflected to the programmable spatial light modulator for adjustment on magnitude and phase through the collimating lens array and the cylindrical surface reflector, and then returned to the grating array to be synthesized into a C waveband output light signal and an L waveband output light signal through the cylindrical surface reflector and the collimating lens array, and the C waveband output light signal and the L waveband output light signal are output through a designated output optical fiber port after the polarization state is restored. According to the C and L waveband wavelength selecting switch, as well as the implementation method and the processing unit, only one programmable spatial light modulator is used for realizing dynamic allocation of a C waveband wavelength resource and an L waveband wavelength resource through a skillful design of a light path, the structure is simple and the system cost is greatly reduced.

Description

technical field [0001] The invention relates to a wavelength selective switch, in particular to a C+L band wavelength selective switch and its realization method and processing unit. Background technique [0002] In recent years, communication services (including multimedia services such as voice, data and video images) have been developing year by year, especially the rapid growth of data and video transmission business volume, and the requirements for transmission capacity, speed, distance and transmission quality of optical networks are constantly increasing , but also pay special attention to the flexibility of optical network construction and the reduction of construction and operation and maintenance costs. [0003] DWDM dense wavelength division multiplexing system is the most common optical layer networking technology at present. The transmission capability of tens of wavelengths or even hundreds of wavelengths can be realized through the multiplexer / demultiplexer. H...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is how to solve the problem of how to realize high-resolution C+L band wavelength selective switch WSS with simple structure and relatively low cost

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