Delay-locked-loop-based remote microwave signal phase-stabilized optical fiber transmission device

A delay-locked loop and microwave signal technology, which is applied in the field of microwave photonics, can solve the problems of microwave signal phase asynchrony, etc., and achieve the effects of easy long-distance transmission, high stability, and large correction range
CN102215104AInactive Publication Date: 2011-10-12SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2011-10-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a delay-locked-loop-based remote microwave signal phase-stabilized optical fiber transmission device, which realizes the phase synchronization of a local microwave signal and a remote microwave signal by utilizing a delay-locked loop. The device realizes optoelectronic heterodyne mixing by utilizing the nonlinear effects of an optoelectronic modulator for phase detection, drives and controls a microwave delayer by feeding a phase difference signal back, performs phase change on the microwave signals, compensates microwave signal phase disturbance caused by the delay change of a transmission link, keeps a phase synchronism relationship between the local microwave signal and the remote microwave signal, solves the problem of phase asynchronism between the local microwave signal and the remote microwave signal, fulfills the aim of phase-stabilized transmission of the microwave signals, adopts noncoherent correction, and has the advantages of wide dynamic range, high stability and the like, besides a long phase-stabilized transmission distance.
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Description

technical field

[0001] The invention relates to a device for phase-stable transmission of microwave local oscillator signals through optical fibers in the field of microwave photonics, in particular to a long-distance phase-stable optical fiber transmission device for microwave signals based on a delay-locked loop. Background technique

[0002] At present, many precise measurements require the long-distance phase-stable transmission of microwave signals, such as the distribution of atomic clocks, the distribution of local oscillator signals in millimeter-wave interferometric antenna arrays for astronomical detection, and so on. The traditional microwave signal transmission uses a phase-stable coaxial cable, but due to the large loss of the cable, it cannot support long-distance transmission of more than tens of kilometers. Optical fiber is considered to be the best medium for long-distance transmission of microwave signals due to its low loss and anti-electromagnetic interfe...

Claims

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