This paper has presented a design of dispersion compensating fiber with small core photonic crystal fiber (PCF) based on
pure silica. The designed small core PCF can be controlled the dispersion properties in terms of the structural parameters,
the pitch Λ and the air-filling fraction d/Λ. The negative chromatic dispersion coefficient can be achieved -
586.5ps/(nm·km) at λ=1550nm with Λ=0.9μm and d/Λ=0.9. This kind of PCF can be used for broadband dispersion
compensation in S+C+L band (1460-1565nm) and the chromatic dispersion coefficient is lower than -450ps/(nm·km)
in S+C+L band. It can realize the dispersion slope compensation because that it exhibits a negative dispersion slope.
The Gigabit Ethernet technology has already been maturity. Compared with other technology, Gigabit Ethernet technology possesses higher performance and more convenience realization, so in volume holographic storage (VHM) system, we choose Gigabit Ethernet as channel interface of volume holographic storage.
KEYWORDS: Data processing, Computing systems, Standards development, Local area networks, Holographic data storage systems, Embedded systems, Volume holography, Optical design, Holography, Data storage
iSCSI builds on SCSI command for storage and TCP/IP protocols for networking. As a new storage technology, VHS has advantage of huge capability and fast data transfer rate. This paper presents a detailed design, based on Intel's network processor and embedded Linux OS, to implement embedded VHS system in which unites iSCSI and VHS technologies.
iSCSI builds on SCSI command for storage and TCP/IP protocols for networking. As a new storage technology, VHS has advantage of huge capability and fast data transfer rate. This paper presents a detailed design, based on Intel's network processor and embedded Linux OS, to implement embedded VHS system in which unites iSCSI and VHS technologies.
This paper introduces an NC machining process simulator. It enables NC programmers or machining operators to check the effects on the part of the cutter motions prescribed in an NC program before machining is performed. The device model (both geometry and logic) of a machining center, NC program controller and the stock-fixture model on the pallet can be defined in this system so as to provide a visual simulation circumstance of machining projects. The machining process is driven directly by NC program by means of an NC program interpreter. Not only can the material removal be visualized, but also the possible danger of collision and interference among cutting tool, stocks and fixtures can be detected during the cutting progress. The simulator is suitable for 3 through 5 Axes NC machining, especially milling, drilling and boring of cast box parts.
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