共查询到20条相似文献,搜索用时 468 毫秒
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波分复用是增大通信容量,提高线路利用率的常用技术.本文提出了一种用于波分复用系统的ATM光交换模型.该结构利用波分复用的特点,采用内部多通道互连方式,使其具有易于实现、结构简单、对内部缓存要求较低等优点.并对该模型进行了性能分析,得出了结论. 相似文献
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用三干涉臂马赫-曾德尔干涉仪制成的光纤密集型波分复用器 总被引:1,自引:1,他引:0
提出一种新型的光纤干涉仪 ,它是采用二个 3× 3单模光纤耦合器组成三光纤系统的马赫 -曾德尔 (Mach- Zehnder)干涉仪 ,当干涉仪的三条光纤干涉臂两两之间分别存在长度差Δ L和2Δ L时 ,干涉仪形成了一个波分复用间隔相等的三波分复用器 ,波分复用的波长间隔仅仅取决于ΔL的大小。实验样品的使用波段为 1.55μm,波长复用间隔为 1.6 nm,附加损耗为 0 .6 d B。 相似文献
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以穿透深度依赖于入射波长的基本双啁啾结构为基础,通过对其中的布拉格膜对进行“周期 重复”的方法来提高空间线性侧向位移,从而实现不同波长的入射光的空间分离,用于高集成度的薄膜空间解波分复用器件的设计.比较了总层数相同的直接双啁啾结构和重复周期为n倍的改进结构,发现后者在理论设计更具有应用优势,同时在实验制作上有更高的容差性 .对空间色散特性曲线在周期重复数较大、入射波长较大的情况下所出现的强烈振荡做出了定性分析.
关键词:
双啁啾结构
空间色散
波分复用
薄膜器件 相似文献
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光纤马赫—陈德尔干涉型8波分超窄波分复用器的研制 总被引:9,自引:2,他引:7
报道了采用7个单模光纤马赫-陈德尔干涉仪进行三级串联而组成的8波分复用器,既保留了干涉型光纤波分复用器超窄波分复用间隔的优点,又消除了其复用路数少的缺点。文中介绍了这类波分复用器的原理、设计方法和制造技术。实验样品的使用波段为1.5μm,波长复用间隔为2.4nm,整个器件的附加损耗约为1.5dB。 相似文献
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Martin Nordal Petersen Roeland Nuijts Lars Lange Bjørn 《Fiber and Integrated Optics》2014,33(3):224-231
AbstractThis article presents an advanced optical model for simulation of alien wavelengths in multi-domain and multi-vendor dense wavelength-division multiplexing networks. The model aids optical network planners with a better understanding of the non-linear effects present in dense wavelength-division multiplexing systems and better utilization of alien wavelengths in future applications. The limiting physical effects for alien wavelengths are investigated in relation to power levels, channel spacing, and other factors. The simulation results are verified through experimental setup in live multi-domain dense wavelength-division multiplexing systems between two national research networks: SURFnet in Holland and NORDUnet in Denmark. 相似文献
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Ali Shahpari Abdelgader Abdalla Ricardo Ferreira Giorgia Parca Jacklyn D. Reis Mario Lima 《Fiber and Integrated Optics》2014,33(3):149-162
AbstractThis article experimentally demonstrates a hybrid fiber–free-space passive optical network that enables high spectral density, aggregated capacity, and total throughput through ultra-dense wavelength-division multiplexing baseband and radio-over-fiber channels. Ultra-dense wavelength-division multiplexing 10-Gb/s Nyquist-shaped 16-ary quadrature amplitude modulation, 10-Gb/s radio-over-fiber orthogonal frequency-division multiplexing, and 8.75-Gb/s baseband orthogonal frequency-division multiplexing signals per user were transmitted through a maximum 40-km passive optical network, which includes a 6-m free-space optics link with acceptable performance. 相似文献
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In a recent experiment it was demonstrated that polarization-division multiplexing was incompatible with wavelength-division multiplexing. We discuss a theoretical model that explains this result. 相似文献
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Fiber Bragg grating-based self-referencing technique for wavelength-multiplexed intensity sensors 总被引:1,自引:0,他引:1
An amplitude-phase-conversion self-referencing technique for intensity-modulated photonic sensors that uses two different-wavelength fiber Bragg gratings is presented. With this technique, the system response has been demonstrated to be almost unafffected by network power variations as high as 90% of the total power launched by the source. We prove the multiplexing capability of this type of self-referenced fiber sensor by wavelength-division multiplexing two of them in a star network. A tunable fused biconical wavelength-division multiplexer is used for sensor addressing at the detection block, providing both good isolation and low cross-talk values. 相似文献
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Toshio Morioka 《Optical Review》2004,11(3):153-161
Recent progress in ultrafast and wideband all-optical processing technologies to realize flexible and transparent optical time-division multiplexing (OTDM)/wavelength-division multiplexing (WDM) photonic networks is reviewed covering ultrafast OTDM technologies handling more than 100 Gbit/s per wavelength channel and wideband WDM technologies handling more than 1000 wavelength channels over the 200 nm range. 相似文献
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A narrow-bandpass filter with a 15-dB signal-to-noise level is demonstrated using Bragg-grating assisted mode conversion within a tapered waveguide. The potential effects of such filters in wavelength-division multiplexing systems are discussed. 相似文献
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Novel multiplexers-demultiplexers for dense wavelength-division multiplexing systems that use interleaved sampled gratings are presented. It is shown that, with the appropriate design, configurations ranging from hybrid to add-drop as well as all-grating-based multiplexers can easily be realized. 相似文献
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We discuss the concept of coarse wavelength-division multiplexing (CWDM) for metro networks. After reviewing the requirements on components such as lasers and fiber, we propose different architectures for a flexible upgrade of existing CWDM systems. 相似文献