AO Modulators System for Recirculating Loop System - Brimrose - #1

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Brimrose Corporation of America 19 Loveton Circle, Sparks, MD 21152 USA Phone: +1 410 472-7070 Fax: +1 410 472-7960 E-Mail: offices@brimrose.com Web: http://www.brimrose.com 1 AO Modulators System for Recirculating Loop System For application of simulating and testing of long distance fiber-optic communication lines Brimrose has developed a fiber-pigtailed AO modulator system. The recirculating loop system consists of 2 fiberpigtailed AO modulators and a corresponding RF driver. One of the modulators is placed outside the loop to defined the transmitted pulse width and the second devices is placed inside the loop to defined the distance of the pulse transmission which corresponds directly to the length of the long distance fiber-optic line. Since conventional AO devices will frequency shift the transmitted light by the acoustic carrier frequency, the Brimrose approach utilizes a no-shift AO devices inside the loop which does not complicate testing nor degrade system performance.