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In the last step, a 10 nanometre-thick silicon nitride barrier layer is applied to the label side of the disc to protect against humidity. [42] [52] [55] [56] Blu-rays have their data very close to the read surface of the disc, which is necessary for Blu-rays to achieve their capacity. Discs in large quantities can either be replicated or ...
Wong, Poh-Kam (July 1999). "The Dynamics of the HDD Industry Development in Singapore" (PDF).Centre for Management of Innovation and Technopreneurship, National University of Singapore: The Information Storage Industry Center, Graduate School of International Relations and Pacific Studies, University of California.
Control Data Corporation 606 tape drive, showing two long vertical vacuum columns in the lower part.. A disadvantageous effect termed shoe-shining occurs during read/write if the data transfer rate falls below the minimum threshold at which the tape drive heads were designed to transfer data to or from a continuously running tape.
They would all connect to a common bus inside the chassis and connect outside the box with a single connector. [ 3 ] For general computer use, the 2.5-inch form factor (typically found in laptops and used for most SATA SSDs) is the most popular, in three thicknesses [ 98 ] (7.0mm, 9.5mm, 14.8 or 15.0mm; with 12.0mm also available for some models).
In 2001, Twibright Labs released RONJA Metropolis, an open-source DIY 10 Mbit/s full-duplex LED FSO system that can span 1.4 km (0.87 mi). [34] [35] In 2004, a visible light communication consortium was formed in Japan. [36]
Optical fiber connectors are used in telephone exchanges, for customer premises wiring, and in outside plant applications to connect equipment and fiber-optic cables, or to cross-connect cables. Most optical fiber connectors are spring-loaded, so the fiber faces are pressed together when the connectors are mated.
The current lower windows (O and E) around 1300 nm have much lower losses. This region has zero dispersion. The middle windows (S and C) around 1500 nm are the most widely used. This region has the lowest attenuation losses and achieves the longest range. It does have some dispersion, so dispersion compensator devices are used to address this.
An optical cross-connect (OXC) is a device used by telecommunications carriers to switch high-speed optical signals in a fiber optic network, such as an optical mesh network. In the 1980s, when transmission speeds supported by optical fibers increased from 45 Mbit/s to 2.5 Gbit/s , carrier networks developed and introduced digital cross ...