Tunable dispersion compensatorThe TH-TDC grating-based tunable dispersion compensator offers accurate dispersion levels, low group-delay ripples (<±5 psec, smoothed), low polarization-mode dispersion (<0.5 psec), low insertion loss (<1 dB), and low power consumption (<5 W) for emerging 40-Gbit/sec systems. The dispersion level provided by the component can be adjusted dynamically to counteract chromatic dispersion fluctuations resulting from climatic variations and component aging. Applications include single-channel dispersion compensation for high-capacity long-haul and ultra-long-haul optical networks, 10-Gbit/sec or higher metro systems, and submarine optical-network systems.TeraXion, Quebec CityFOR FREE DATA, enter NO. 302 at www.onlinecenter.to/lwZero water peak fiber upgradeThe new-generation AllWave fiber, according to the company, achieves less than half the aging loss. Fully standardized as ITU G.652c, the fiber offers the same dispersion as conventional singlemode fiber but with reduced loss and zero water peak in the 1400-nm water peak band, enabling the use of extra bandwidth equivalent to 100 DWDM channels. AllWave is compatible with existing singlemode-fiber systems to mesh seamlessly with existing networks. For metro local and access networks, including cable TV, the fiber allows carriers to use coarse WDM as well.OFS, Norcross, GAFOR FREE DATA, enter NO. 303 at ww.onlinecenter.to/lwTEST EQUIPMENT