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首页> 外文期刊>Journal of Lightwave Technology >Optical Front-Ends to Generate Optical Millimeter-Wave Signal in Radio-Over-Fiber Systems With Different Architectures
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Optical Front-Ends to Generate Optical Millimeter-Wave Signal in Radio-Over-Fiber Systems With Different Architectures

机译：在具有不同架构的光纤无线电系统中产生光毫米波信号的光前端

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摘要

We have proposed and experimentally demonstrated three different optical front-ends to implement in wavelength-division-multiplexing (WDM) radio-over-fiber (ROF) networks to minimize the cost of the ROF system. When the number of WDM channels is small, such as smaller than four channels, the simplest front-end to generate WDM optical millimeter (mm)-wave signals is to use only broadband direct-modulation laser (DML) for each WDM channel. In this case, the expensive external modulator can be removed. However, when the number of WDM channels is large, such as larger than four, the frond-end to generate WDM optical mm-wave signals can be realized by using an external modulator to upconvert simultaneously all channels after the WDM channel signals are multiplexed. In this way, the cost of the expensive external modulator will be shared by all channels. For seamless integration of WDM signals that come from the existing backbone with ROF system, a broadband external modulator can be used to upconvert WDM signals.
机译：我们已经提出并通过实验证明了三种不同的光学前端，可以在波分复用（WDM）光纤无线电（ROF）网络中实现，以最大程度地降低ROF系统的成本。当WDM通道的数量较少（例如少于四个通道）时，生成WDM毫米波信号的最简单前端是为每个WDM通道仅使用宽带直接调制激光器（DML）。在这种情况下，可以去除昂贵的外部调制器。然而，当WDM信道的数量较大，例如大于四个时，可以通过使用外部调制器在WDM信道信号被复用之后同时上变频所有信道来实现产生WDM光毫米波信号的前端。这样，昂贵的外部调制器的成本将由所有通道分担。为了将来自现有骨干网的WDM信号与ROF系统无缝集成，可以使用宽带外部调制器上变频WDM信号。

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