| 摘要 |
An art for stabilizing the operating point suitable for an optical transmitter, especially for that including a Mach-Zehnder optical modulator (6), is disclosed. According to this art, deterioration in the waveform of the output optical signal due to the operating point drift can be prevented without depending on the input signal. Further, by performing an operating point shift under specific conditions, deterioration in the waveform due to wavelength dispersion can be effectively prevented, whether the sign of the wavelength dispersion is positive or negative. <IMAGE> |
