NDLI: Challenges in component testing for optical systems

Content Provider	IEEE Xplore Digital Library
Author	Lunardi, L.M. Feuer, M.D. Chen, Y. Singh, A. Pavlik, R. Gonzales, E. Visone, C. Lumish, S.
Copyright Year	2001
Description	Author affiliation: JDS Uniphase, Eatontown, NJ, USA (Lunardi, L.M.)
Abstract	We discuss several examples that have been obtained from testing components in system-like conditions from our point of view as a component maker. First, we examine the conventional bidirectional transmission using interleaved signals for two directions within same band. One advantage of the bidirectional interleaving transmission, over separate band bidirectional transmission is the reduction of the four wave mixing phenomenon, which occurs between narrowly spaced copropagating adjacent channels, and is mitigated due to the copropagating channel space doubling. In both uni- and bidirectional cases, separate paths and amplifiers for the traffic in the two directions are used at the amplification nodes. This, in turn, is not cost effective, and if not properly filtered could easily form a loop for Rayleigh backscattering. This limitation is almost entirely removed with the development of a birefringent interleaver filter, which can be combined with a non-reciprocal birefringent filter to deliver near-complete blockage of backreflected channels. The resulting components (i.e., bidirectional isolator, bidirectional circulator, four-port interleaver) enable the use of standard unidirectional optical components to create bidirectional networks that deliver twice the spectral efficiency of unidirectional networks. We also illustrate some of the technical challenges that face the designer of 40 Gbit/s systems but can only be overcome with new types of components, such as tunable dispersion compensators and low dispersion components.
Starting Page	540
Ending Page	541
File Size	163671
Page Count	2
File Format	PDF
ISBN	0780371054
ISSN	10928081
DOI	10.1109/LEOS.2001.968928
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	System testing Optical devices Optical filters Birefringence Optical mixing Interleaved codes Four-wave mixing Extraterrestrial phenomena Optical amplifiers Costs
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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