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Microwave photon mixing method and system based on local oscillator frequency doubling

A technology of microwave photonics and frequency mixing, which is applied in the fields of optical communication and microwave photonics, can solve the problems of high loss, small bandwidth of microwave communication, bulky volume, etc., to reduce frequency requirements, optimize link structure design, and reduce stray signals Effect

Active Publication Date: 2018-10-16
BEIJING UNIV OF TECH
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Problems solved by technology

[0002] Traditional microwave communication can transmit in any direction and is easy to build and reconstruct, but limited by the transmission performance of coaxial cables, microwave communication has disadvantages such as small bandwidth, high loss, severe electromagnetic interference, and bulky volume.

Method used

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  • Microwave photon mixing method and system based on local oscillator frequency doubling
  • Microwave photon mixing method and system based on local oscillator frequency doubling
  • Microwave photon mixing method and system based on local oscillator frequency doubling

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the embodiments, drawings and mathematical derivation.

[0014] The system structure of the microwave photon mixing method based on local oscillator frequency doubling in this embodiment is as follows figure 1 shown.

[0015] The laser adopts a distributed feedback laser 1 (RIO, ORION), which outputs a continuous optical carrier with a center frequency of 1550.09nm, a power of 17.6dBm, and a line width of 500kHz. The optical carrier enters the dual-polarization dual-parallel Mach-Zehnder modulator 4 (Fujitsu, FTM7977HQA) after passing through the pre-polarization controller 2. The pre-polarization controller 2 is used to adjust the polarization direction of the optical carrier to align it with the dual-polarization dual The slow axis of the Mach-Zehnder modulator 4 is parallelized for maximum power output. The dual-polarization dual-parallel Mach-Zehnder modulator consists of a first dual-parall...

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Abstract

The invention discloses a microwave photon mixing method and system based on local oscillator frequency doubling, and belongs to the fields of optical communication and microwave photonics. The microwave photon mixing system based on local oscillator frequency doubling is formed by utilizing a double-polarization double-parallel mach-zehnder modulator through combination with devices such as a laser, a front polarization controller, a microwave 90-degree coupler, a rear polarization controller, an optical fiber polarizer, an adjustable optical band-pass filter, an erbium-doped fiber amplifier,a photoelectric detector and the like. The system adopts second-order local oscillator sideband and first-order radio frequency sideband beat frequencies, and mixing processing based on local oscillator frequency doubling can be realized; on one hand, the frequency requirement of a mixing system on a local oscillator signal is reduced, and on the other hand, due to the fact that a single-sidebandmodulation mode is adopted, stray signals can be effectively reduced. In addition, the mixing method can realize switching of up conversion and down conversion by changing a direct current bias voltage, and can be used for time-sharing transmitting and receiving of radio frequency.

Description

technical field [0001] The invention proposes a microwave photon frequency mixing method and system based on local oscillator frequency doubling, and the method and system belong to the fields of optical communication and microwave photonics. Background technique [0002] Traditional microwave communication can be launched in any direction and is easy to build and reconfigure, but limited by the transmission performance of coaxial cables, microwave communication has shortcomings such as small bandwidth, high loss, severe electromagnetic interference, and bulky size. Optical fiber communication has the advantages of low loss, anti-electromagnetic interference, and ultra-large bandwidth, which can solve the above problems. As an emerging interdisciplinary subject, microwave photonics combines optical fiber technology with microwave communication to form a new type of communication link. The microwave photonic link adds electrical / optical and optical / electrical conversion, mod...

Claims

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Application Information

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IPC IPC(8): H04B10/50
CPCH04B10/503H04B10/505
Inventor 王大勇王云新李静楠杨登才杨锋许家豪戎路赵洁杨旭东
Owner BEIJING UNIV OF TECH
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