CORNING, N.Y., Aug. 15 /PRNewswire/ -- Corning Incorporated (NYSE: GLW), a world-leading supplier of optical fiber, photonic products and optical cable, today announced that it will specify laser bandwidth on its InfiniCor(R) 300 and InfiniCor(R) CL(TM) 1000 multimode fibers using the Restricted Mode Launch (RML) bandwidth measurement specification. RML bandwidth provides a repeatable and accurate measurement of performance in laser-based systems used in high-speed networks. Minimum RML bandwidth values will be provided for both products at the 850 nm operating wavelength. In the past, multimode fiber has been specified according to a minimum over-filled launch bandwidth (OFL BW) standard. OFL is a reliable and robust method of specifying bandwidth in multimode fiber when used with light-emitting diodes (LEDs) at lower speeds. However, because LEDs distribute optical power throughout the entire fiber core, fiber specified to this measurement may not meet expected performance requirements in high-speed networks using laser light sources. Laser launch conditions typically restrict power to fewer modes in the center of the core, thus requiring the fiber to be measured differently for laser bandwidth. The RML measurement is the result of the work done by the Telecommunication Industry Association (TIA) FO-2.2.1 Task Group on Modal Dependence of Bandwidth chaired by Mike Hackert, Measurement Project Engineer at Corning Incorporated. The goal of the Task Force was to establish restrictions on the launch power distribution of the laser source as well as the bandwidth properties of the multimode fiber under a standard restricted mode launch. The TIA recently adopted RML BW as the standard measurement of laser bandwidth for 62.5 micron multimode fibers operating at 850 nm. "By providing minimum RML bandwidth on our InfiniCor 300 and InfiniCor CL 1000 products, Corning will provide end users with bandwidth values that accurately predict multimode fiber performance when used in laser-based systems," says Carolyn Case, product line manager - Premises at Corning Incorporated. "Although the RML measurement methodology has not yet been validated in standards for 50 micron fiber or for operation at 1300 nm, Corning will lead the efforts to develop measurement specifications that will soon be available for all multimode fibers. In the meantime, we will continue to use our proprietary measurements to guarantee performance in laser-based systems." According to Alan Eusden, vice president and general manager - Corning Optical Fiber, "Corning continues to lead the industry in the innovation and implementation of new fiber technology. The development of practical bandwidth test methodologies along with continued refinements in fiber manufacture, are key to the success of low-cost, laser-based, high-speed network systems." Corning has pioneered multimode fiber technology developments for high-speed local area networks. In September 1998, Corning launched the InfiniCor fiber product line, the world's first multimode laser-optimized fiber(TM). InfiniCor fiber guarantees link lengths well beyond what is specified in the IEEE 802.3z standard for Gigabit Ethernet and exceeds ANSI/TIA/EIA-568-A specifications. Within months of the product's launch, Corning sold 100,000 kms of InfiniCor fiber with its revolutionary approach to solving laser-multimode fiber issues uncovered in the development of the Gigabit Ethernet standard. In February 1999, Corning introduced InfiniCor CL(TM) fiber, the first multimode fiber that provided network managers with the ability to transmit over extraordinary distances at Gigabit Ethernet speeds while also eliminating the need for a mode-conditioning patch cord at 1300nm. Established in 1851, Corning Incorporated (http://www.corning.com) creates leading-edge technologies for the fastest-growing markets of the world's economy. Corning manufactures optical fiber, cable and photonic products for the telecommunications industry; and high-performance displays and components for television and other communications-related industries. The company also uses advanced materials to manufacture products for scientific, semiconductor and environmental markets. Corning's revenues in 1999 were $4.7 billion. More information on Corning optical fiber is available at http://www.corning.com/opticalfiber.
SOURCE Corning Incorporated