Image Interference Suppression Mixer Based on Fiber Dispersion Effect

A technology of image interference and fiber dispersion, which is applied in the field of microwave photonics, can solve the problems that the bandwidth range cannot be effectively expanded, and cannot be applied to high frequency bands, etc., so as to get rid of the dependence on phase accuracy, realize image interference, and overcome frequency limitations. Effect
CN110336611BActive Publication Date: 2021-01-29INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Publication Date
2021-01-29

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Abstract

The invention discloses an image interference suppression mixer based on optical fiber dispersion effect, comprising: a distributed feedback laser, a dual-parallel Mach-Zehnder modulator, an optical power amplifier, a section of single-mode optical fiber, and a photoelectric detector. Three DC sources, a reference signal source, a power attenuator, and an ultra-wideband antenna. In the present invention, only by adjusting the three DC sources, the suppression of image interference and the compensation of periodic power dissipation caused by long-distance optical fiber transmission can be realized simultaneously. The structure of the mixer in the present invention breaks away from the dependence on the phase shifter or the quadrature coupler, avoids the problem of image suppression performance weakening caused by inaccurate phase, and has simple structure and convenient operation.
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Description

technical field

[0001] The invention belongs to the field of microwave photonics, and in particular relates to an image interference suppression mixer based on optical fiber dispersion effect. Background technique

[0002] In recent years, the development of microwave photonics has received extensive attention. Compared with traditional electrical technologies, microwave photonics has the advantages of larger bandwidth, better isolation, anti-electromagnetic interference, light weight, and small size. Among them, microwave photonic mixers play an important role in the process of down-converting high-frequency signals or up-converting low-frequency signals. However, in the actual application process, the artificial image signal has obvious interference to the frequency conversion result of the mixer. Since the intermediate frequency signal after frequency conversion of the image signal and the intermediate frequency signal after frequency conversion of the radio frequency si...

Claims

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