Coherent light frequency comb based channelized broadband multi-frequency measuring system

Abstract

The invention discloses a coherent light frequency comb based channelized broadband multi-frequency measuring system, which relates to the field of optical communication technology and comprises a seed light source generation module, a signal light frequency comb, a vibration light frequency comb, a first Mach-Zehnder modulator and a coherent receiving module. The seed light source generating module is respectively connected with the signal light frequency comb and the vibration light frequency comb and used for transmitting generated signal light and vibration light to the signal light frequency comb and the vibration light frequency comb respectively, the signal light frequency comb is connected with the first Mach-Zehnder modulator, the first Mach-Zehnder modulator is connected with the coherent receiving module, and the vibration light frequency comb is connected with the coherent receiving module. The coherent light frequency comb based channelized broadband multi-frequency measuring system has the advantages of high flexibility, low amplifying noise and high accuracy, can measure multi-frequency-point radio frequency signals in a real-time, parallel and broadband manner. Besides, testing equipment is simple and cost is low.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a channelized broadband multi-frequency measurement system based on a coherent optical frequency comb. Background technique [0002] RF frequency measurement is the process of receiving RF signals, analyzing and processing the RF signals, and is an important part of the RF system. It has important applications in military and civilian communications, especially in electronic countermeasures technology. figure 1 A typical application block diagram of instantaneous RF frequency measurement in electronic countermeasures is shown. It can be seen from the figure that the instantaneous frequency measurement receiver mainly provides emission control signals for electronic jammers. In practical applications, for broadband electronic interference, only the instantaneous frequency measurement receiver is required to provide rough frequency information. In this case, the req...

AI Technical Summary

Problems solved by technology

However, the existing research on photon-assisted microwave frequency measurement systems mostly focuses on single-frequency point microwave frequency measurement [1, 2], which is difficult to meet the requirements of modern radio frequency measurement

The frequency measurement of multi-frequency radio frequency signals has also been studied [6, 7], but the insertion loss caused by passive components in [6] limits the measurement sensitivity of the system. If an amplifier is used, it will introduce amplified noise, resulting in frequency measurement errors

Although the article [7] solves the problem of insertion loss of passive devices, the equipment is complex and unstable, and cannot be used practically

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