Bandwidth reduction in gigabit ethernet transmission over multimode fiber and recovery through laser transmitter mode conditioning

Citation
T. Giles et al., Bandwidth reduction in gigabit ethernet transmission over multimode fiber and recovery through laser transmitter mode conditioning, OPT ENG, 37(12), 1998, pp. 3156-3160
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL ENGINEERING
ISSN journal
00913286 → ACNP
Volume
37
Issue
12
Year of publication
1998
Pages
3156 - 3160
Database
ISI
SICI code
0091-3286(199812)37:12<3156:BRIGET>2.0.ZU;2-#
Abstract
The experimental work carried out by members of the Gigabit Ethernet Standa rd's Modal Bandwidth investigation group are reviewed to provide an underst anding and to propose a solution to the bandwidth reduction observed in hig h-speed fiber optic test links based on laser transmitters and multimode fi ber. The reduced bandwidth values, as compared to the manufacturers specifi ed values, were caused by differential mode delay (DMD) in the optical sign al. The cause of the DMD is linked to a combination of the launch condition s established between the laser source and multimode fiber. The criteria fo r developing a solution with the goal of modifying the launch conditions to eliminate DMD in laser transmission over 99% of multimode fibers are estab lished. (C) 1998 Society of Photo-Optical Instrumentation Engineers. [S0091 -3286(98)00912-X].