Patent ID: 8346097
Filing Date: 2013-01-01
Classification: H04B

Abstract:
1. An optical apparatus comprising: a light source; an RF detector connected and arranged to receive a first fraction of an RF electrical input signal and to provide a corresponding detected RF signal level; an optical power control circuit operatively coupled to the RF detector and to the light source and arranged to set a DC optical power level (i) at a first, selected, substantially constant DC optical power level whenever, during operation of the optical power control circuit, the detected RF signal level is below a first selected RF threshold level and (ii) at a second, selected, substantially constant DC optical power level whenever, during operation of the optical power control circuit, the detected RF signal is above the first selected RF threshold level, which second selected DC optical power level is larger than the first selected DC optical power level; and an optical modulator operatively coupled to the light source and arranged to receive a second fraction of the RF electrical input signal and to modulate therewith optical output power about the DC optical power level.