Balance optical microwave regeneration system

Abstract

The invention provides a balance optical microwave regeneration system which comprises a phase discrimination module and a radio frequency (RF) processing module, wherein the phase discrimination module and the RF processing module are sequentially connected with a peripheral signal source used for providing a laser pulse signal; the phase discrimination module comprises an opto-isolator, a Sagnac fiber-optic ring and a balance detector which are sequentially connected; the Sagnac fiber-optic ring comprises a 3*3 optical fiber coupler and a phase modulator; a first input end of the 3*3 optical fiber coupler is connected with the opto-isolator, a second input end of the 3*3 optical fiber coupler is connected with a first optical input port of the balance detector, a third input end of the 3*3 optical fiber coupler is connected with a second optical input port of the balance detector, a second output end of the 3*3 optical fiber coupler is connected with a first optical interface of the phase modulator, and a third output end of the 3*3 optical fiber coupler is connected with a second optical interface of the phase modulator. The balance optical microwave regeneration system is simple in structure, low in noise, high in stability, high in jitter accuracy, low in cost and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and in particular relates to a balanced optical microwave regeneration system. Background technique [0002] The synchronization system guarantees the dynamic quality of the beam and the stability of the arrival time of the laser beam and the electron beam by locking the phases of each link of the free electron laser device and the reference signal, so as to meet the physical requirements of the free electron laser device. One of the key components of stream quality and experiment success. Therefore, for free electron laser devices with a scale of hundreds of meters or even thousands of meters, the synchronization of laser and microwave with high precision and high stability is particularly important. [0003] The synchronization of laser and microwave is generally realized by extracting microwave signal from laser pulse signal. At present, the commonly used laser and microwave sync...

AI Technical Summary

Problems solved by technology

However, the existing balanced microwave phase detection method uses the phase-locked loop technology based on 2×2 fiber coupler. Since the input path of the 2×2 fiber coupler is the same as the output path in the Saguenay fiber ring, there is inherent non-reciprocity , and this phase-locked loop needs to use a bias optical path with a phase shift of π / 2, so the structure is complex and additional noise will be introduced

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