Driving circuit of laser diode and optical transmission device
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United States of America Patent
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Feb 9, 1999
Issued Date -
N/A
app pub date -
Jul 1, 1997
filing date -
Sep 24, 1992
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Abstract
An optical transmission device which is used for a short range optical data link or an optical communication system for subscribers and more particularly requires no automatic optical power control minimizes the turn-on delay time of a laser diode and allows unformatted optical signal transmission by fixed level decision receiving system. By applying a fixed-bias electric current which is not more than the electric threshold current value of the laser diode to the laser diode, the turn-on delay time of the laser diode can be minimized, and the extinction level can be lowered by it, and the fixed level decision receiving system can be used, and the optical receiver circuit can be simplified more.
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