An ultra-long-distance optical fiber high-precision radio frequency signal transmission system and method

Abstract

The invention discloses an ultra-long-distance optical fiber high-precision radio frequency signal transmission system and method. A large dynamic and high-quality phase jitter compensation system includes: a high-stable phase conjugate compensation device near the system, which is used for ultra-long-distance optical fiber transmission. The RF signal of the system is directly tracked by phase detection and tracking to obtain a high-quality and low-phase-noise signal, which is passively mixed with the local high-stability auxiliary RF signal to achieve phase conjugation of the return signal; the remote RF signal of the system is phase-locked The regenerative device is connected with the near-end phase-conjugate compensation device through an ultra-long-distance optical fiber, and is used to receive the phase-conjugate signal sent from the near-end, and perform phase-locked regeneration on it through a phase-locked loop with a high-stable crystal oscillator. The invention can high-quality compensate the phase jitter introduced by the ultra-long-distance optical fiber link to the transmission radio frequency signal, improve the short-term and long-term stability of the transmission system, and realize the ultra-long-distance optical fiber high-precision radio frequency signal transmission.

Description

technical field [0001] The invention relates to the technical field of ultra-long-distance optical fiber stable radio frequency signal transmission, in particular to an ultra-long-distance optical fiber high-precision radio frequency signal transmission system and method. Background technique [0002] An atomic clock is a precision device that generates a standard frequency. It generates a highly stable single frequency signal based on the energy of the atomic transition line. The high-performance atomic clock systems currently used in research are all too complicated, have high environmental requirements and are not conducive to carrying. It is especially important to distribute the degree to the user end. This not only saves construction cost, but also facilitates wide application in engineering. For the current satellite transmission method with high transmission stability, its disadvantage is that it can only be obtained by long-term measurement and average calculation...

AI Technical Summary

Problems solved by technology

At the same time, as the optical fiber distance of the atomic frequency standard signal transmission continues to increase, the signal quality will seriously deteriorate, the signal-to-noise ratio will decrease, and the ultra-long-distance optical fiber frequency signal transmission will increase the round-trip transmission delay. Therefore, it is necessary to design A high-quality phase jitter compensation system and method that takes into account both long-term stability and short-term stability

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