NDLI: Methods to reduce radiated emissions from optical transceivers

Content Provider	IEEE Xplore Digital Library
Author	Moongilan, D.
Copyright Year	2003
Description	Author affiliation: Bell Labs., Innovations for Lucent Technol., Holmdel, NJ, USA (Moongilan, D.)
Abstract	Telecommunication network equipment extensively uses optical transceivers to convert electrical signals into lightwave and vice-versa. The aperture (ferrule) of the transceiver where fiber will be attached cannot be completely RF shielded to prevent radiation in the frequency range of 8 to 40 GHz. Most telecommunication equipment is designed to operate in a frame without doors or covers and therefore, radiation must be stopped at circuit pack level in order to meet the regulatory and customer imposed radiated emission requirements. The radiation levels from optical transceivers increase with data-rate, transmit optical power-level, and fiber impedance. Transceivers of different manufacturers may be used in optical network platforms to increase the data throughput and rate. The radiated emissions emanating from transceivers are found to be different depending on their type and manufacturer. This paper discusses downward angular installation methods to reduce radiated emission levels from transceivers so that equipment has extra margin to compensate for increased radiated emission levels from certain transceivers. A theoretical calculation of transceiver placement angle to lower radiated emissions is presented. Also presented and results discussed is experimental data for different downward angular placement for a simulated transceiver and for transceivers installed in network equipment.
Starting Page	398
Ending Page	403
File Size	383915
Page Count	6
File Format	PDF
ISBN	0780378350
DOI	10.1109/ISEMC.2003.1236629
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-08-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stimulated emission Transceivers Optical fiber networks Optical fiber devices Manufacturing Apertures Radio frequency Circuits Impedance Throughput
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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