Title :
Wideband efficiency improvement of fiber optic systems by carrier subtraction
Author :
Esman, R.D. ; Williams, K.J.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
Carrier subtraction from a weakly modulated optical signal is proposed, analyzed, and demonstrated to improve fiber-optic system efficiency. For constant photodetector current, an amount of carrier suppression results in an equal amount of RF gain. Improvement of 9-13 dB in link loss from 1 to 25 GHz is measured using a Fabry-Perot filter operating in the reflection mode. Measured induced harmonic distortion agrees with predicted values.<>
Keywords :
broadband networks; harmonic distortion; optical fibre filters; optical fibre losses; optical fibre networks; optical modulation; photodetectors; 1 to 25 GHz; 9 to 13 dB; Fabry-Perot filter; RF gain; carrier subtraction; carrier suppression; constant photodetector current; fiber optic systems; fiber-optic system efficiency; induced harmonic distortion; link loss; reflection mode; weakly modulated optical signal; wideband efficiency improvement; Distortion measurement; Optical distortion; Optical fibers; Optical filters; Optical losses; Optical modulation; Photodetectors; Radio frequency; Signal analysis; Wideband;
Journal_Title :
Photonics Technology Letters, IEEE
