Emerging optical code-division multiple access communication systems
Emerging optical code-division multiple access communication systems
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DOI：
10.1109/65.21908
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发表时间：
1989-03
期刊：
影响因子：
9.3
通讯作者：
J. Salehi
中科院分区：
文献类型：
--
作者：
J. Salehi
考虑以光学方式执行信号处理功能以便仅在需要时才进行从光到电的信号转换的全光学系统。讨论了三种这样的方案：光纤码分多址系统、神经形态码分多址系统和超短光脉冲码分多址系统。首先研究了使用非相干光信号处理技术来建立光码分多址系统的光纤码分多址系统。特别地，讨论了一类用于非相干光纤码分多址系统的新型序列，称为光正交码。然后将这些代码应用于神经形态光学系统，并检查了网络的各种应用。描述了最近的实验，这些实验证明了编码和解码极快的飞秒光脉冲的能力，并暗示了基于超短光脉冲的超高速码分多址系统的可能性。
All-optical systems, which perform signal processing functions optically so that the signal conversion from optical to electrical is done only when desired, are considered. Three such schemes are discussed, namely, fiber-optic code-division multiple-access (CDMA) systems, neuromorphic CDMA systems, and ultrashort-light-pulse CDMA systems. Fiber-optic CDMA systems in which incoherent optical signal processing techniques are used to establish optical CDMA systems are first examined. In particular, a novel class of sequences for incoherent fiber-optic CDMA systems, called optical orthogonal codes, are discussed. The codes are then applied to neuromorphic optical systems, and various applications of the networks are examined. Recent experiments that demonstrate the ability to encode and decode extremely fast, femtosecond optical pulses and that suggest the possibility of ultrahigh-speed CDMA systems based on ultrashort light pulses are described.>