Optimization of Launch Conditions in 10 Gb/s Links Using Next Generation Multimode Fibers

Copyright © (2004) by IEEE. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distrubuted for profit. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee.

In this letter we explore the optimization of the ISI penalty and its correlation with various transmitter and fiber parameters characterizing 10 Gb/s 300m long LAN links using 50 µm next generation multimode fibers. The analysis of a large statistical sample suggests that the range of optimal values for the laser encircled flux is 12-16 µm, the lateral offset of the source 10-18µm and the axial offset -60 to +60 µm. The optimization of the launch conditions may reduce the ISI Penalty by as much as 0.7 dB. The axial offset between the laser and the fiber axes has detrimental effects on the performance of the link if the launch conditions are not optimized.

By: Aleksandar Risteski, Petar Pepeljugoski

Published in: IEEE Photonics Technology Letters, volume 16, (no 5), pages 1394-6 in 2004


This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.


Questions about this service can be mailed to reports@us.ibm.com .