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Radio-over-Fiber ( RoF ) technologies have been considered to be a promising solution to broadband access and ubiquitous sensing. We present a novel approach using dual-wavelength lights to suppress the nonlinear intermodulation distortion in intensity-modulated RoF link both theoretically and experimentally. The system we proposed mainly consists of two Laser Diodes (LDs ) at different wavelengths, a commercial available Mach-Zehnder Modulator (MZM) and a Photo Detector (PD). More than 25 dB suppression of the Third-order Intermodulation Distortion (IMD3) is achieved by adjusting the wavelength and optical power of the laser. Besides , the output of the MZM is then sent to the photodetector via a single fiber, which simplifies the system complexity for distribution of RF signals over long distances . 相似文献
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淮安市高良涧水电站建于1969年12月,装有16台水轮发电机组,使用T145-10A型同步发电机,经过36年的运行,发电机绝缘材料老化严重,安全等级降低,于2007年9月对其中的2台发电机进行更新改造,选用SFW-W250-10/850型同步发电机,同时采用TWL-SD低压型微机控制励磁装置替换原来的磁场变阻器励磁调节装置。新旧发电机的性能参数如表1。 相似文献
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