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Dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system

A microwave photonic link and system implementation technology, which is applied in the field of microwave photonic signal transmission and processing, can solve the problems of microwave photonic links that fail to achieve high linearity, insufficient IMD3 suppression, and complex design structures, etc., and achieve universal and generalizability, easy integration processing, and the effect of improving linearity

Active Publication Date: 2015-08-12
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a high linearity microwave photon link based on DPMZM in view of the complex design structure in the prior art, insufficient IMD3 suppression, and failure to realize high linearity microwave photon links. link realization system

Method used

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  • Dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system
  • Dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system
  • Dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system

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Embodiment Construction

[0032] exist figure 1 Among them, a DPMZM-based high-linearity microwave photon link realization system provided by the present invention includes: a laser, a signal source, a DPMZM, an electrical shunt, an electrical attenuator, a DC power supply, and a photodetector;

[0033] The DPMZM includes an uplink sub-modulator, a downlink sub-modulator and a phase modulator;

[0034] The radio frequency signal generated by the signal source is divided into two paths through an electric power divider, one path is directly connected to the radio frequency input port of the uplink sub-modulator, and the other path is connected to the radio frequency input port of the downlink sub-modulator after being attenuated by an electric attenuator. port connection;

[0035] The laser is connected to the optical input port of the DPMZM, and outputs an optical carrier for the DPMZM, and the DC power supply controls the bias point of the DPMZM and the phase state of the DPMZM optical signal; the DC...

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Abstract

The invention relates to a dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system. The dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system includes a laser, a signal source, a DPMZM, an electric splitter, an electric attenuator, a direct current power source and a photoelectric detector; radio frequency signals generated by the signal source are divided into two paths through the electric power splitter, wherein one path is connected with an uplink sub modulator, and the other path is connected with a downlink sub modulator through the electric attenuator; the laser is connected with an optical input port of the DPMZM; the direct current power source controls the phase states of the bias points of the DPMZM and the optical signals of the DPMZM; and the optical signals outputted by the DPMZM are connected with the photoelectric detector through optical fiber transmission, so that direct detection can be performed, and frequency beating can be completed in the photoelectric detector, and therefore, third-order intermodulation interference can be inhibited. According to the dual-parallel Mach-Zehnder modulator (DPMZM) high-linearity microwave photonic link implementation system of the invention, asymmetric power distribution is performed on radio frequency signals in the two optical wave interference paths of the DPMZM, so that the modulation depth of the two sub modulators of the DPMZM can be changed and precisely controlled; the optimal bias points of the sub modulators are set; and therefore, third-order intermodulation interference can be inhibited to the largest extent, and the linearity of a microwave photonic link can be improved.

Description

technical field [0001] The present invention relates to a high-linearity microwave photon link realization system, in particular to a high-linearity microwave photon link based on an asymmetrical power distribution dual-parallel Mach-Zehnder modulator (Dual-Parallel Mach-Zehnder Modulator, DPMZM) The invention relates to a circuit realization system, which belongs to the technical field of microwave photon signal transmission and processing. Background technique [0002] Microwave photonics is an emerging subject combining microwave and photon technology, among which microwave photonics technology branches such as optically-generated millimeter wave technology, radio-over-fiber (ROF) technology, and optically controlled phased array technology have become research hotspots at home and abroad in recent years. As the basis for the realization of these technologies, microwave photonic links have the characteristics of large transmission capacity, strong nonlinear suppression ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/70
Inventor 梁栋谭庆贵蒋炜朱忠博李小军马海虹秦伟泽幺周石
Owner XIAN INSTITUE OF SPACE RADIO TECH
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