A generalised and comprehensive flowchart is developed for designing optical fiber communication links, taking into consideration most design factors and component parameters. The flowchart, which is implemented into a web page using ASP.net web programming and C#, is tested on several existing optical fiber links. A general computer-aided approach is developed to assist the designer in selecting suitable combination(s) of Transmitter, Fiber, Detector and number of repeaters to satisfy the link specifications. The capability of this program to minimize the number of repeaters is also demonstrated. With the proper choice of parameters, the program also determines the various cost involved and finally the Cost Estimation relationships. Also an experimental investigation is carried out on an existing long-haul optical fiber link. (Adnan Affandi, Othman AL-Rusaini. A Novel Computer Aided Approach to Fiber Optic Communication link

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A Novel Computer Aided Approach to Fiber Optic Communication link Design

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Characterization of erbium doped fibers

An initial optical fiber transmission system under development for Army long haul tactical communications is described and evaluated. The system interfaces with the 2.304 Mbit/s data input and output of an Army inventory multiplexer and its orderwire. The system includes transmitter and receiver end terminals, three data rate transparent repeaters, 8 km of graded index optical fiber, plus three optical attenuators and various optical connectors for simulating transmission up to 32 km. Long repeater spacing is achieved using low loss fiber, semiconductor lasers stabilized using optical feedback, and avalanche photodiodes. The system met all of the specified requirements and shows that optical fiber transmission systems have excellent prospects of meeting full military specifications. The versatility of data rate transparent repeaters is achievable even for transmission up to the 64 km distance desired for Army long haul tactical communications.

T. Eppes

Papers

Optical Fiber Transmission System Demonstration Over 32 km with Repeaters Data Rate Transparent Up to 2.3 Mbits/s