| 释义 |
DFB laser (Distributed FeedBack laser) multiplexing (WDM). DFB lasers run in the 1300 and 1550 nm regions. As signals at these wavelengths attenuate relatively little, they are preferred for long haul applications. Also,WDM is centered on the 1550 nm window. In total, these characteristics currently make DFB lasers the overwhelming choice of telecommunications carriers and CATV providers, in high speed local loop and long haul wide area network (WAN) applications, where their relatively high cost is justifiable. See also attenuation, bandwidth, diffraction grating, Fabry-Perot laser, laser, laser diode, LED, local loop, spectral width, VCSEL, WAN, wavelength, WDM, and window. |