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This paper analyzes and demonstrates a simplified frequency quadrupling configuration for optical millimeter-wave(mm-wave)generation,in which the electrical phase shifter and optical filter are omitted.Theoretical analysis is given to reach the optimum operating conditions including direct current(DC)bias voltage,optical transmission point of the dual-parallel Mach-Zehnder modulator(MZM)bias voltage,optical transmission point of the dual-parallel Mach-Zehnder modulator(DP-MZM),amplitude of the radio frequency(RF)driving signal and the impact of the extinction ratio(EF)on the optical sideband suppression ratio(OSSR)and radio frequency spurious suppression ratio(RFSSR).Experiments prove an OSSR of 15 dB and an RFSSR of 26 dB for the new frequency quadrupling scheme at 6 GHz,8 GHz and 10 GHz of RF driving signal without any electrical phase shifter or optical filter.This system exhibits the advantage of low wavelength dependence and large frequency tunable range. 相似文献
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对因特网中一些重要数据信息进行还原和提取,是保证网络应用的健康发展和打击网络犯罪的一个重要手段。根据因特网中的实时网络数据大多基于HTTP协议进行构建与传输这一应用背景,针对HTTP1.1中增加的持续性连接(Persist Connection)与块编码(Chunked Encoding)技术,探讨了在新技术下的信息还原方法,实现了对某些应用场合所关心数据的还原、提取和存储。所给出的还原方法经实践验证,处理效率和效果达到了预期目标,对识别因特网中的不良网页信息具有较大的实用价值。 相似文献
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