<p>An optical modulator achieving high extinction ratio and an optical modulator system. By a control system performing an adjustment method comprising predetermined steps by applying a bias voltage daringly to a modulation electrode for switching the USB signal and LSB signal of an established optical SSB modulator or optical FSK modulator, a means for adjusting bias voltage applied to each bias electrode preferably automatically is provided and a bias point where the extinction ratio of an optical modulator is maximized can be obtained.</p>
申请公布号
EP1918762(A1)
申请公布日期
2008.05.07
申请号
EP20060796669
申请日期
2006.08.23
申请人
NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY