KEYWORDS: Clocks, Local area networks, Phase only filters, Digital signal processing, Transmitters, Polymer optical fibers, Receivers, Computing systems, Transmittance, Optical signal processing
In this paper, a new converter for plastic optical is proposed .The whole system is divided into 5 parts and each of them are introduced. In this experimental system, the M array is used to replace the actually data sources. Then change the M array into the CMI code. Through the optical-electric transmission part, the signals are sent to the CMI decode part in which the original M array is recovered. The circuit board by which the data signals can be transmitted has been achieved in lab. The parameters of the system are discussed. The relationship between the system clock and BER(bit error rate) is analyzed. Several different factors which have effects on the system's performance are discussed. In order to patch with RJ-45, the further work mainly focus on the connection with the nowadays netcards which are widely used in PC and LAN.
A new tunable optical encoder/decoder structure based on holographic optical processor is proposed. The simulation experiments have been accomplished and a part of typical results are given in this paper. In contrast to the previous structures reported in the literature, the new structure has greatly reduced the hardware complexity, the cost and the power loss. It is easy to integrate.
In this paper plastic optical fiber (POF) access network based on optical code-division multiple access (OCDMA) technology is proposed. Recently, optical transmission using POF has received much attention due to its low weight, large core diameter, flexibility, and easy install, specially its high bandwidth make POF a very attractive candidate for transmission media in access network based on OCDMA technology. In conventional OCDMA system only allows finite units to transmit and access simultaneously according to the number of channels which be restricted by BER. To resolve this problem a novel protocol also is proposed in this paper. The protocol can efficiently support variable-sized messages, and any new unit can join the network at any time without requiring network initialization. To implement the demonstration, each optical network unit is equipped with a fixed optical encoder/decoder and tunable optical encoder/decoder. The optical encoder/decoder employing planar holographic optical processors (HOPs) in this system maybe low cost fabrication. The network throughput and average delay using various system parameters has been investigated by numerical analysis and simulation experiments. It is showed that the dynamic control protocol in this POF access network based on OCDMA technology is valid and efficient.
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