Abstract
Vertical-cavity surface-emitting lasers (VCSELs) are used in optical transceivers for local area networks (LANs) and interconnections with data rates of around 1Gbps, such as Gigabit Ethernet, Fibre Channel, and so on. In these systems, the transmission distance more than 500m is available by using 50 μEm core multimode fiber . In this paper, basic technologies of VCSEL-based data transmissions are introduced . Transverse mode characteristics of the oxide-confined VCSELs are also reviewed. Transverse mode can be controlled by adjusting the refractive index confinement effect and applying excess loss to higher order mode selectively . Currently, standardization of 10Gbps LANs and interconnections is in progress. High speed VCSELs and VCSEL arrays are candidates for the short reach applications.
