Microwave photonic down-conversion method based on dual-drive PDM-MZM

A PDM-MZM, microwave photon technology, applied in the field of communication, can solve the problems of poor noise performance and stability, and achieve the effects of overcoming poor noise performance, simplifying the down-conversion method, and improving stability

Active Publication Date: 2018-08-03
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose a microwave photon down-conversion method based on a dual-drive polarization m...

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  • Microwave photonic down-conversion method based on dual-drive PDM-MZM
  • Microwave photonic down-conversion method based on dual-drive PDM-MZM
  • Microwave photonic down-conversion method based on dual-drive PDM-MZM

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] refer to figure 1 , the microwave photon link applicable to the present invention includes: a laser CW laser, two radio frequency signal sources S 1 and S 0 , including two sub-modulators MZM 1 and MZM 2 A polarization multiplexing Mach-Zehnder modulator PDM-MZM, an optical beam splitter PBS, two photodetectors PD 1 and PD 2 and an electrical subtractor. The optical input port of the polarization multiplexing Mach-Zehnder modulator PDM-MZM is connected to the laser CW laser, and the upper and lower electrical drive ports of the polarization multiplexing Mach-Zehnder modulator PDM-MZM are simultaneously connected to the microwave signal source that generates the radio frequency signal RF S 1 and the microwave signal source S that generates the local oscillator signal LO 0 .

[0027] refer to figure 2 , the specific steps of the present invent...

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Abstract

The invention discloses a microwave photonic down-conversion method based on a dual-drive polarization division multiplexing Mach-Zehnder modulator (PDM-MZM), and solves a problem of poor stability and noise performance in the prior art. The method comprises the following steps of inputting an optical carrier signal; generating a radio frequency signal and a local oscillator signal; setting a direct-current bias voltage of a sub-modulator; generating a modulation optical signal; carrying out beam splitting on the modulation optical signal; detecting the modulation optical signal; and restraining noise by an electric subtraction device. According to the method, the noise is restrained through dual-drive one-time modulation of the PDM-MZM and a difference obtained by the electric subtractiondevice, so that the stability and the noise performance are improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a microwave photon down-conversion method based on a dual-drive polarization multiplexing Mach-Zehnder modulator PDM-MZM (Polarization Division Multiplexing Mach-ZehnderModulator) in the technical field of communication. The invention can realize the frequency down conversion of the radio frequency signal by the receiver in the communication system. Background technique [0002] Down-conversion technology is an indispensable key technology for electronic systems such as radar, satellite, wireless communication, electronic reconnaissance and countermeasures, and deep space exploration. It is also widely used in vector signal modulation and demodulation, spectrum analysis, phase noise measurement, automatic phase Control, phase-locked loop and other systems. Traditional microwave down-conversion technology has disadvantages such as limited bandwidth, poor frequency adj...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/50H04B10/69H04B10/556
Inventor 张永倩尚韬吴小海陈丹
Owner XIDIAN UNIV
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