Distributed feedback (DFB) lasers have been applied to wideband and long-haul optical transmission systems. For the applications, the long term performance on transmission characteristics is important. Some life-test results have been reported [1,2], however, the reliability of DFB lasers have not been clear yet. This paper presents the high temperature aging results including 1.8 Gbit/s transmission experiments. This is the first report which describes transmission characterisites as well as lasing characteristics of long aged DFB lasers.

© 1988 Optical Society of America

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