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基于分布反馈式激光器和双驱动马赫曾德尔调制器的外部调制方式提出并论证一种具有多波长输出特性的、能够传输有线和无线信号的新型全双工混合传输的系统。本系统避免了在众多基站使用大量昂贵的射频电子器件,与其他方案相比,大大降低了成本。 相似文献
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PTN网络商用初期,主要采用线性保护实现业务在网络内部的自动保护倒换,随着PTN环网保护技术的发展成熟,线性保护不再是网络内保护的唯一选择。本文将从网络可靠性、配置和维护便利性、资源利用率、适用网络拓扑和网络扩容能力等几方面,对PTN线性保护和环网保护进行对比分析。 相似文献
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A plasmonic refractive index sensor based on metal-insulator-metal(MIM) waveguide-coupled structure is proposed and demonstrated in this paper.The physical mechanism of the device is deduced,and the finite difference time domain(FDTD) method is employed to simulate and study its index sensing characteristics.Both analytic and simulated results show that the resonant wavelength of the sensor has a linear relationship with the refractive index of material under sensing.Based on the relationship,the refractive index of the material can be obtained from the detection of the resonant wavelength.The results show that the sensitivity of the sensor can exceed 1600 nm/RIU,and it can be used in chemical and biological detections. 相似文献
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