Microwave photon receiving method and device

Abstract

The invention discloses a microwave photon receiving method, and belongs to the technical field of microwave photonics. Firstly, the received radio frequency signal is sent to one radio frequency input port of a dual-drive-Mach-Zehnder modulator; an optical modulation signal outputted by the dual-drive-Mach-Zehnder modulator is divided into two paths, and one of the paths forms a photoelectric oscillation loop which is fed back to the other radio frequency input port of the dual-drive-Mach-Zehnder modulator, wherein oscillation frequency of the photoelectric oscillation loop is close to carrier frequency in the radio frequency signal and sufficient to enable the photoelectric oscillation loop to work under an injection locking mode; DC bias voltage of the dual-drive-Mach-Zehnder modulator is adjusted so that phases between input signals on the two radio frequency input ports are non-orthogonal; and the optical modulation signal outputted by the other path is photo-electrically converted so that a down-conversion base band or an intermediate frequency signal is obtained. The invention also discloses a microwave photon receiving device. The device is high in conversion efficiency, low in loss, simple in structure and low in cost.

Description

technical field [0001] The invention relates to a microwave photon receiving method, in particular to a microwave photon receiving method and device based on an OEO (Optoelectronic Oscilattor, optoelectronic oscillator), and belongs to the technical field of microwave photonics. Background technique [0002] The main function of the microwave receiver in the microwave system is to down-convert the received RF signal, so that the high-frequency RF signal is down-converted to the baseband or intermediate frequency for further signal processing. Usually, microwave receivers are mostly based on electrical mixers, and the nonlinear effect of electrical mixers is used to realize the down-conversion of signals. However, due to the bottleneck of electronic technology, receivers based on electric mixers often have disadvantages such as low conversion efficiency, low isolation between local oscillator and RF port, low operating frequency, narrow operating bandwidth, and large signal d...

AI Technical Summary

Problems solved by technology

On the one hand, in addition to the semiconductor optical amplifier, this method still needs to add one or more electro-optic modulators to modulate the received radio frequency signal and local local oscillator signal to the light; on the other hand, it is limited by the carrier recovery time of the semiconductor optical amplifier. Limitations, the quality of the signal processed by the final receiver is often poor, and complex post-processing is required to meet the processing requirements of the back-end, which further increases the system cost

In addition, similar to the previous method, a phase locking or phase compensation device is still needed to solve the stability problem caused by the local oscillator phase disturbance

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