Microwave photon delay time measurement calibration device

Abstract

The invention provides a microwave photon delay time measurement calibration device. The device includes three parts of a delay time measurement system, a phase detection calibration system and a to-be-measured optical path. A set of single-frequency signals generated by a signal generator inside the phase detection calibration system can select and use other multiple different frequency points, all the frequency points satisfy certain multiple relationships, and microwave photon link delay time is calibrated through detecting differential phases of all the frequency points between a referenceoptical link and the measured optical link and phase quantization. The device of the invention eliminates the 360-degree phase ambiguity problem in phase measurement on a principle scheme, can realize accurate calibration on a high-precision optical delay time quantity measurement device by using a highly stable hydrogen clock and an optical delay model, and can use more standard frequency signals for larger delay time quantity measurement.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a microwave photon delay measurement calibration device. Background technique [0002] As an important application of microwave photonic technology, fiber delay lines have the advantages of small size, light weight, wide bandwidth, low loss, and strong anti-interference ability compared with traditional electrical delays, and are gradually applied to radar systems and electronic countermeasure systems. For example, the application of optical fiber delay line in traditional phase interferometer, the use of optical fiber delay line to delay the signals received by different antennas, so that the system can process various signals in time division, can effectively solve the problem of traditional phase interferometer with large amount of equipment and complicated system This is also a hot issue in the field of phase interferometer research. [0003] Optical ...

AI Technical Summary

Problems solved by technology

However, the traditional OFDR-based delay measurement system lacks a calibration scheme, and cannot give the accuracy of optical delay measurement under different time scales.

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