In CWDM equipment, we can use lasers in unregulated temperature, lower cost and which emit at wavelengths spaced 20 nm in the transmission window 1270-1610 nm. CWDM is the subject of the ITU-T recommendation G.695, which provides for flexible and scalable solutions, including the solution of 8 to 16 channels with two optical fibers (one for each direction of transmision), offering data rates of 1.25 Gb / s to 2.5 Gb / s per channel.
However, systems CDWM not compatible with optical amplifiers, are limited in scope. Two lengths are indicative of connection specified in Recommendation G.695: up to 40 km and up to about 80 km, which is usually enough for the needs of metropolitan networks.
In contrast, in the record books in 2004, Alcatel was just topped mythical 10 Terabit / s, in a multiplex fiber Alcatel TeraLight 256 channels each operating at 40 Gb / s over a distance of 100 Km This error-free transmission was achieved by combining amplifiers hybrid Erbium / Raman.
In addition, Alcatel has managed to pass 3 terabit / s over a distance of 300 Km 7, in 300 multiplex channels each operating at 10 Gb / s, with optical amplifiers doped with erbium (EDFA) broadband
No comments:
Post a Comment