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A Method for Broadband Microwave Single Sideband Modulation in Photonics

A single-sideband modulation and photonics technology, which is applied in the field of microwave technology and optical communication, and can solve the problem that the single-sideband modulation technology of photonics broadband microwave signal is rarely studied.

Active Publication Date: 2019-04-19
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the SSB modulation technology of broadband microwave signals in photonics is rarely studied

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  • A Method for Broadband Microwave Single Sideband Modulation in Photonics
  • A Method for Broadband Microwave Single Sideband Modulation in Photonics
  • A Method for Broadband Microwave Single Sideband Modulation in Photonics

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Embodiment Construction

[0024] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following The described embodiment:

[0025] figure 1 It is a schematic diagram of a photonic broadband microwave single sideband modulation method. In this example, the device includes: LD, PDM-DPMZM, OBPF, PD, two microwave signal sources, microwave quadrature coupler, and microwave power divider. The output port of LD is connected with the optical input port of PDM-DPMZM through polarization maintaining optical fiber. The first microwave signal source outputs IF signal, which is connected to the RF input ports of Xa and Ya respectively after passing through the orthogonal coupler, and the microwave si...

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Abstract

The invention discloses a photonic broadband microwave single side band modulator and an operation method thereof. The method relates to the technical field of a microwave and the technical field of optical communication. The method as shown in the appended drawing, comprises a laser diode (LD), a polarization division multiplexing dual-parallel mach-zehnder modulator (PDM-DPMZM), an optical bandpass filter (OBPF), a photoelectric detector (PD), a microwave orthocoupler (Hybrid) and a microwave power divider. According to the method, a pair of orthogonal up-converters are established through utilization of the PDM-DPMZM and the OBPF; upper-conversion is carried out on orthogonal intermediate frequency (IF) signals through local oscillator (LO) signals; and after the signals pass through the PD, radio frequency (RF) signals with upper side bands or lower side bands are obtained. The modulator and the method are simple in structure, the bandwidth is high, and moreover, a relatively high suppression ratio for the side bands and carriers is achieved.

Description

technical field [0001] The invention relates to the field of microwave technology and the field of optical communication technology, and mainly relates to the photonic broadband microwave single sideband modulation technology. Background technique [0002] Single sideband modulation has the advantages of saving frequency band resources and low power consumption, and is widely used in electronic systems such as radar and wireless communication. [0003] The core components of traditional microwave signal SSB modulators are microwave mixers and phase shifters, which have problems such as limited bandwidth and serious electromagnetic interference. In addition, the asymmetry of microwave mixers and phase shifter errors will cause carrier Leakage, poor sideband suppression ratio and other issues. [0004] At present, optical communication and optical signal processing technology are developing rapidly. Microwave signal mixing and phase shifting technology based on photonics has ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/516
CPCH04B10/5165
Inventor 高永胜文爱军陈玮梁栋蒋炜
Owner XIDIAN UNIV