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Method and device for generating RoF system millimeter waves by adopting SOA

A millimeter-wave and optical millimeter-wave technology, applied in laser components, optics, instruments, etc., can solve problems such as in-depth research and application limitations of ROF communication technology, system performance degradation, and large phase noise, achieving low phase noise and high performance. Good, affordable and practical effect

Inactive Publication Date: 2010-05-26
LIAOCHENG UNIV
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Problems solved by technology

However, the initial phase independence of the two light waves due to the independence of the two lasers brings a lot of phase noise to the entire system, which will degrade the system performance
This limits the in-depth research and application of ROF communication technology.

Method used

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  • Method and device for generating RoF system millimeter waves by adopting SOA

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Embodiment Construction

[0010] The data signal (3) is modulated by a Mach-Zehnder modulator (4) to the continuous light wave emitted by one of the single-mode lasers (1) (called signal light f s ), another single-mode laser (2) emits continuous light waves (called pump light f p ). Then, through the two polarization controllers (5) and (6), the signal light f s And pump light f p After the polarization direction is adjusted to be consistent, the wavelength division multiplexer (7) is input into the semiconductor optical amplifier SOA (8), and the injection current of the SOA is adjusted to make the pump light f p And signal light f a Obvious four-wave mixing effect is produced in SOA, resulting in transformed light 2f p -f s And idle frequency light 2f s -f p And its higher harmonics. Get signal light f through filter (9) s And transform light 2f p -f s It is the optical millimeter wave required by the RoF system, or the pump light f is obtained through the filter (9) p And idle frequency light 2f s -f ...

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Abstract

The invention provides a method and a device for generating RoF (Radio-over-Fiber) system millimeter waves by adopting SOA (semiconductor optical amplifiers), which belongs to the field of millimeter wave generation in ROF communication technology. The method comprises: inputting pump light and signal light into the SOA, adopting the SOA to produce obvious four-wave mixing effect and obtaining optical millimeter waves needed by a RoF system through a filter; utilizing the four-wave mixing effect to fix phase between light waves so as to obviously reduce phase noise of the system and improve the performance of the system; adopting a proper optical fiber combination for transmission in order to effectively reduce dispersion damage, nonlinear damage and attenuation damage during the transmission of system signals; and performing frequency beating on the optical millimeter waves at a photoelectric detection end so as to generate electric millimeter waves. A RoF millimeter wave generation system built by the invention has the advantages of low phase noise, good performance, simple structure, low price and easiness for practical use, thereby providing strong support for the optimization of RoF millimeter wave systems and intensive study in the field.

Description

Technical field [0001] The invention relates to a method and a device for generating a fiber-over-fiber (Radio-over-Fiber, ROF) system millimeter wave by using semiconductor optical amplifiers (SOA), and belongs to the field of millimeter wave generation in ROF communication technology. Background technique [0002] In recent years, various wireless services such as telecommunications (phone calls, short messages, etc.), data (browsing, on-demand, etc.), and broadband streaming media have been increasing rapidly, and the demand for high-speed and large-capacity wireless communications has been increasing. In order to realize wireless broadband communication, its operating frequency must be increased. However, most of the wireless services at home and abroad are concentrated below 3GHz, and the existing low-band frequency resources are almost all occupied, but the frequency resources above 3GHz are rarely used, especially for the 24GHz and 60GHz frequency bands. The two atmospher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35H01S3/00H01S5/00
Inventor 郑宏军刘山亮黎昕
Owner LIAOCHENG UNIV
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