Quadruplicated frequency signal optical fiber arbitrary point steady-phase distribution system based on phase conjugation

Abstract

The invention provides a quadruplicated frequency signal optical fiber arbitrary point steady-phase distribution system based on phase conjugation and belongs to the technical field of optical fiber steady-phase distribution; the system comprises an annular optical fiber link structure mainly composed of a local end, n far-end stations, n +1 sections of optical fiber links and n optical fiber couplers, wherein the local station comprises a microwave source, a dual-carrier wave optical signal generating module, a phase conjugated optical signal generating module, an optical fiber coupler, a first photoelectric detector and an optical fiber circulator; and each of the far-end stations respectively comprises an electro-optical frequency mixing module, an optical amplifier, a second photoelectric detector, an electric amplifier and an electric filter. The main device used by the system is a photonic device; due to the high-frequency broadband characteristic of the photonic device, the system can achieve optical fiber long-distance stable phase distribution of higher frequency signals; and the problem of deterioration of the phase stability precision caused by local oscillator leakage and harmonic interference introduced when an electric mixer is used is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of optical fiber phase-stable distribution, and in particular relates to a phase-conjugated quadruple-frequency signal optical fiber arbitrary point phase-stable distribution system. Background technique [0002] In high-energy particle accelerators, very long baseline interferometry (VLBI) antenna arrays and other application systems that require high time-frequency accuracy, the ultra-stable RF signal fiber distribution system has lower transmission loss, larger bandwidth, and higher reliability. It has gradually become a more competitive radio frequency signal distribution system due to its advantages of sex and anti-electromagnetic interference. However, due to temperature changes and mechanical disturbances in the surrounding environment of the optical fiber, the fiber delay will fluctuate, which in turn will cause the phase jitter of the distributed RF signal and deteriorate the quality of the remote r...

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Problems solved by technology

[0005] Aiming at the problem that the local oscillator leakage and harmonic interference introduced by the electric mixer in the current fiber optic radio frequency phase stable distribution system based on passive phase compensation will reduce the phase stability accuracy, the present invention proposes a quadrupling frequency signal optical fiber based on phase conjugation Arbitrary point stable phase distribution system

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