Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link

A linear optimization and frequency conversion link technology, applied in the direction of electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve the problems of transmission signal fading, inability to extract useful signals at the receiving end, different time delays, etc.

Active Publication Date: 2021-07-06
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fiber chromatic dispersion will cause different time delays for signals of different frequencies, that is to say, different frequency components in the PD received signal will show different phase shifts
At this time, the transmission performance of the link will be affected by the

Method used

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  • Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link
  • Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link
  • Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link

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Embodiment Construction

[0032] 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.

[0033] As attached in the manual figure 1 As shown, in this embodiment, the device includes: laser LD, polarization modulator PolM, single-mode fiber SMF, polarization controller PC, Sagnac ring, erbium-doped fiber amplifier EDFA, polarizer Polarizer and photodetector PD. The Sagnac ring is composed of an optical circulator OC, a polarization beam splitter PBS, a phase modulator PM and a 90° polarization rotator 90°PR.

[0034] In this example, the specific implementation steps of the method are:

[0035] Step 1: The laser generates a continuous light wave with a w...

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Abstract

The invention discloses a method for simultaneously realizing linear optimization and power periodic fading compensation in an analog photon down-conversion link. As shown in a figure 1 in the specification, a device comprises a laser device (LD), a polarization modulator PolM, a single-mode fiber (SMF), a polarization controller (PC), a Sagnac ring, an erbium-doped fiber amplifier (EDFA), a polarizer and a photoelectric detector (PD). A radio frequency signal is modulated to an optical carrier through a PolM, odd and even order sidebands of a modulated signal in an orthogonal polarization state are separated through a polarization controller and a polarization beam splitter (PBS) in a Sagnac ring, and a phase modulator (PM) is bidirectionally used in the Sagnac ring to enable one polarization state in the clockwise direction to be modulated by an LO signal. Appropriate phase shift is introduced between two orthogonal polarization directions of a down-conversion signal, so power fading caused by dispersion can be compensated after photoelectric conversion, third-order intermodulation distortion is eliminated, and linear optimization is realized. The device is simple and compact in structure, flexible in tuning, large in working bandwidth and high in system reconfigurability.

Description

technical field [0001] The invention relates to the technical field of optical communication and microwave technology, and mainly relates to the linear optimization and periodic power fading compensation of an analog photon down-conversion link. Background technique [0002] Microwave photonics is a new discipline that combines microwave radio frequency technology with photonics technology. It completes the processing of electrical signals in the optical domain, including signal generation, transmission, frequency mixing, and filtering. Microwave photonic links have the advantages of large communication capacity, small transmission loss, small size, light weight, and anti-electromagnetic interference. They have broad application prospects in satellite communications, radar, electronic warfare, and cable television. Microwave photonic frequency conversion technology is widely used in various fields of modern society. Traditional microwave down conversion technology faces elec...

Claims

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Application Information

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IPC IPC(8): H04B10/50H04B10/516H04B10/548H04B10/58H04J14/06
CPCH04B10/503H04B10/516H04B10/548H04B10/58H04J14/06
Inventor 丁玉玲文爱军李圆圆
Owner XIDIAN UNIV
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