| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase an eye aperture in an eye pattern for lengthening transmission distance in a direct modulation type optical module. <P>SOLUTION: In an input current for drive to be inputted to a semiconductor laser, the rate of change (inclination) in fall time is set smaller than that in rise time. Additionally, overshooting is made to a transition state at least by rising. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
