| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving method of an optical modulator, which enables long-distance transmission by effectively suppressing transmission waveform deterioration due to a wavelength dispersion characteristic of a transmission path, and an optical transmitter and an optical transmission system using the driving method. <P>SOLUTION: An optical transmitter to which a driving method of an optical modulator is applied, includes an optical modulator 1 which generates an optical signal modulated in accordance with a data signal Din to send out the optical signal to the transmission path, and a driving apparatus 10 therefor, and the driving apparatus 10 comprises: a pattern detection circuit 11 which detects a "011" and a "110" in the data signal Din; a 2-bit delay circuit 12 which delays the data signal Din by 2 bits; a pulse width expansion circuit 13 which expands each pulse width in a second bit in the "011" and in the second bit in the "110" in a data signal D1 outputted from the 2-bit delay circuit 12, according to the pattern detection result of the pattern detection circuit 11; and a driving circuit 14 which drives the optical modulator 1 in accordance with the data signal in which the pulse width is expanded. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
