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首页> 外文期刊>Lightwave Technology, Journal of >Photonic Down-Conversion of Millimeter Wave Multiband Orthogonal Frequency Division Multiplexing Ultra-Wideband Using Four Wave Mixing in an Electro-Absorption Modulator
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Photonic Down-Conversion of Millimeter Wave Multiband Orthogonal Frequency Division Multiplexing Ultra-Wideband Using Four Wave Mixing in an Electro-Absorption Modulator

机译：在电吸收调制器中使用四波混频的毫米波多频带正交频分复用超宽带的光子降频转换

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摘要

We propose and demonstrate a novel and cost-effective photonic down-conversion scheme for millimeter wave (mm-wave) over fiber (MoF) uplinks using an electro-absorption modulator (EAM) at a base station. Two wavelengths with frequency difference of flo, used as dual wavelength, are incident to an EAM that is driven by an mm-wave signal at fmm to obtain optical subcarrier modulation. Due to four-wave mixing (FWM), two new wavelengths are generated inside the EAM and used for the optical carriers for the uplink. One of the generated two wavelengths and one of two mm-wave signal subcarriers is separated by fmm-flo in frequency, thus down-converted. Furthermore, down-conversion with tunability of optical carrier to optical subcarrier power ratio can be achieved by simply controlling the dual wavelength power into the EAM. We experimentally investigate the efficiency of the FWM versus EAM reverse bias voltage and input optical power. The performance of the proposed scheme for down-conversion of a 30 GHz multiband (MB) orthogonal frequency division multiplexing (OFDM) ultra-wideband (UWB) is also investigated in terms of error vector magnitude (EVM) versus RF and LO modulation index, and received optical power at the photodetector.
机译：我们提出并演示了一种新颖且经济高效的光子下转换方案，用于在基站使用电吸收调制器（EAM）在光纤（MoF）上行链路上进行毫米波（mm-wave）转换。频率差为fl的两个波长（用作双波长）入射到EAM，由fmm的毫米波信号驱动，以获取光学副载波调制。由于四波混频（FWM），在EAM内部产生了两个新波长，并将其用于上行链路的光载波。产生的两个波长之一和两个毫米波信号子载波之一在频率上被fmm-flo隔开，因此被下变频。此外，可以通过简单地控制进入EAM的双波长功率来实现具有光载波与光子载波功率比可调性的下转换。我们通过实验研究了FWM与EAM反向偏置电压和输入光功率的效率。还根据误差矢量幅度（EVM）与RF和LO调制指数的关系研究了用于30 GHz多频带（MB）正交频分复用（OFDM）超宽带（UWB）的下变频建议方案的性能，并在光电探测器处接收光功率。

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