Odevity demultiplexer based on cascaded ring-shaped cavity pairs structure

Abstract

This invention relates to a cascade odd and even number demultiplexer that is on the basis of toroid cavity structure. The invention includes an input optical fiber, a first output optical fiber and a second output optical fiber. The invention includes standard placed lens, a polarizing beam splitter, an input half wave plate and a cascade toroid cavity along antegrade direction of output beam of input optical fiber in order; the invention includes a first input half wave plate, a first polarizing combining beam equipment, a first focusing lens and a stated first output optical fiber along antegrade direction of output horizontal beam of cascade toroid cavity in order; the invention includes a second output half wave plate, a second polarizing combining beam equipment, a second focusing lens and a stated second output optical fiber along antegrade direction of output perpendicular light beam of cascade toroid cavity in order. This invention is mainly used in wave separating reused communication system to separate double chain of odd and even number of wave separating reused signal and for absorber that needs to smooth spectral transmission rate function.

Description

Technical field: [0001] The present invention is an odd and even number signal separator, especially a filter that can be mainly used in wavelength division multiplexing technology to separate odd and even number signal channels (interleaver) and can also be used for all functions that need to flatten the spectral transmittance function. Background technique: [0002] With the rapid development of dense wavelength division multiplexing technology, the frequency interval of signals is getting smaller and smaller, and wavelength division multiplexing devices with narrower frequency intervals are required to expand capacity, which also puts forward higher requirements for multiplexing / demultiplexing devices. spectral resolution requirements. However, the original multiplexing / demultiplexing devices with very mature technologies, such as dielectric thin film filters, are difficult to continue to use for channel signals with frequency intervals of 50 GHz and smaller. Odd-even wa...

AI Technical Summary

Problems solved by technology

Although the dispersion characteristics of the odd and even number signal splitters of this structure are improved, each annular cavity contains a beam splitter, which inevitably requires the use of a high-precision thin-film process, so it does not take advantage of practical applications.

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