| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure a predetermined eye mask margin in an optical transmitter without depending on a transmission speed. <P>SOLUTION: The optical transmitter includes a semiconductor laser drive circuit 1, and a semiconductor laser 4 for generating and outputting modulated laser light based on the modulation current of the semiconductor laser drive circuit 1. In the above optical transmitter, a phase difference adjustment circuit 2 is provided in the pre-stage of the semiconductor laser drive circuit 1, so as to reduce a phase difference produced between data signals. The phase difference adjustment circuit 2 includes an impedance control line 5, a resistor element 7 having a parasitic inductance component (or an inductor having a parasitic resistance component), and a DC cutoff capacitor 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
