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Improved Driver Circuit for Semiconductor Laser

IP.com Disclosure Number: IPCOM000065558D
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Bassetti, LW Bates, KA [+details]

Abstract

A laser driver circuit is described that has the advantages of low cost, fast rise time, and absence of transients. Because semiconductor lasers are easily damaged, their driver circuits must be fast with no transients. Bipolar transistor switching circuits capable of delivering the required current (100 ma. to 200 ma.) to the laser are expensive and their base storage characteristics limit the rise time of the output signals.