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A high linearity microwave photonic link realization system based on dpmzm

A microwave photon and microwave source technology, applied in the field of microwave photon signal transmission and processing, can solve the problems of microwave photon links that fail to achieve high linearity, insufficient IMD3 suppression, and complex design structures, and achieve versatility and Scalability, easy integration, and improved linearity

Active Publication Date: 2017-07-28
XIAN INSTITUE OF SPACE RADIO TECH
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  • 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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  • A high linearity microwave photonic link realization system based on dpmzm
  • A high linearity microwave photonic link realization system based on dpmzm
  • A high linearity microwave photonic link realization system based on dpmzm

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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

A high-linearity microwave photon link realization system based on DPMZM, including: laser, signal source, DPMZM, electrical shunt, electrical attenuator, DC power supply and photodetector; the radio frequency signal generated by the signal source is divided into The laser is divided into two circuits, one of which is connected to the uplink sub-modulator, and the other is connected to the downlink sub-modulator after passing through the electrical attenuator; the laser is connected to the optical input port of the DPMZM, and the DC power supply controls the bias point of the DPMZM and the DPMZM optical signal The phase state of the DPMZM; the optical signal output by the DPMZM is connected to the photodetector for direct detection through optical fiber transmission, and the beat frequency is completed in the photodetector, thereby realizing the suppression of the third-order intermodulation interference. The present invention changes and accurately controls the modulation depth of the two sub-modulators of the DPMZM by performing asymmetric power distribution on the radio frequency signals in the two-way light wave interference paths of the DPMZM, and sets the best bias points of the corresponding two sub-modulators, thereby suppressing the three sub-modulators to the greatest extent. order intermodulation interference, improving the linearity of microwave photonic links.

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 Patents(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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