| 摘要 |
<p>Disclosed is a modulator arrangement for modulating an optical signal for use in an optical communications or data system comprising a laser for producing an optical signal of a selected wavelength, which signal is applied to an intensity modulator adapted to modulate the intensity of the signal in dependence on a respective drive voltage. The intensity modulator has two outputs, the output power of each output being monitored by a respective two photon absorption detector, the detector signals then being fed to a differential amplifier. The output of the differential amplifier is used to drive a feedback arrangement to a control electrode(s) of the intensity modulator.</p> |
