Multi-channel frequency conversion structure realized by polarization state independent modulation

Abstract

The invention provides a multi-channel frequency conversion structure realized by polarization state independent modulation. The structure comprises a first wavelength division multiplexer; multiple frequency modulation branches, wherein input ends of the frequency modulation branches are connected with an output end of the first wavelength division multiplexer; each frequency modulation branch comprises a first polarization beam splitter, a first modulator and a first polarization beam combiner; input ends of the first polarization beam splitters are connected with the output end of the first wavelength division multiplexer; input ends and output ends of the first modulators are respectively connected with first output ends of the first polarization beam splitters and first input ends of the first polarization beam combiners; and second output ends of the first polarization beam splitters are connected with second input ends of the first polarization beam combiners; a second wavelength division multiplexer which is connected with output ends of the multiple frequency modulation branches; a second polarization beam splitter which is connected with an output end of the second wavelength division multiplexer; a second modulator, wherein an input end of the second modulator is connected with a first output end of the second polarization beam splitter; and an optical coupler, wherein an input end of the optical coupler is connected with a second output end of the second polarization beam splitter and an output end of the second modulator.

Description

technical field [0001] The invention relates to the technical field of frequency conversion processing of wireless signals, in particular to a multi-channel frequency conversion structure realized by polarization state independent modulation. Background technique [0002] In modern communication, microwave signal processing is a key technology in electronic systems such as radar and satellite. However, in the development of the electric field, limited by electronic devices, microwave frequency conversion technology has problems such as limited bandwidth, small frequency tunable range, poor isolation, and serious electromagnetic interference. Using photon technology to process microwave signals can complete functions and indicators that cannot be realized in the electrical domain. Among them, microwave photonic frequency conversion technology combines the advantages of high resolution and high flexibility of microwave, and performs frequency conversion and signal processing ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a multi-channel frequency conversion structure realized by independent modulation of the polarization state to solve the problems existing in the prior art that the differential frequency conversion of multiple wireless signals cannot be performed simultaneously and the flexibility of frequency modulation is not high

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