A microwave phase detector and phase lock device based on microwave photon technology

Abstract

The invention discloses a microwave phase detection device based on microwave photon technology, comprising: a light source for providing an optical pulse sequence with a pulse width of femtosecond level; The Sagnac ring structure is used to phase-modulate the two microwave signals whose frequency is an integer multiple of the repetition frequency of the optical pulse sequence on the two orthogonal polarization states of the optical pulse sequence, and make the forward and backward modulated optical signals in the Sagnac The output port of the ring structure forms interference; the polarization separation module is used to separate the two orthogonal polarization states of the two optical signals output by the Sagnac ring structure; the balance detection module is used to separate the two separated horizontal and The two vertically polarized optical signals are detected in balance, and the phases of the two microwave signals are respectively obtained. The invention also discloses a microwave phase-locking device based on microwave photon technology. The invention can independently and accurately detect the phases of two microwave signals at the same time, and has simple structure and low implementation cost.

Description

technical field [0001] The invention relates to a microwave phase detection device, in particular to a microwave phase detection device based on microwave photon technology. Background technique [0002] Phase detectors have important applications in systems such as signal synchronization, low phase noise microwave extraction, distance measurement, and phase noise measurement. The accuracy of phase detection determines the performance of these systems. Traditional microwave phase detection uses electric frequency mixing, and the reference source is a single-frequency signal, so phase detection can only be performed on a certain frequency. At the same time, the noise of the mixer is large, which has an important impact on the accuracy of phase detection. The microwave phase noise generated by the microwave source is not particularly low, so the phase detection effect is not good. To sum up, the traditional method of phase detection microwave has the disadvantages of poor tu...

AI Technical Summary

Problems solved by technology

But the polarization modulator is expensive, and when the optical pulse is used as a reference source, the extremely high peak power makes the polarization modulator very prone to irreversible damage

[0003] At present, the existing phase detectors use one modulator to detect one microwave. When multiple microwave signals need to be phase detected, multiple phase detectors need to be built. How to use one modulator to detect multiple microwave signals at the same time? The signals are independently phase-detected, and the microwave frequencies can be different, and there is no related research

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