Title :
Predistortion Compensation of Nonlinearities in Channelized RF Photonic Links Using a Dual-Port Optical Modulator
Author :
Agarwal, A. ; Banwell, T. ; Toliver, P. ; Woodward, T.K.
Author_Institution :
Telcordia Technol., Red Bank, NJ, USA
Abstract :
High dynamic range is a key requirement in analog applications. In multichannel optical signal processing applications, a wideband radio-frequency signal suffers from distortion from both in-channel and out-of-channel signals due to nonlinear modulator behavior. We demonstrate experimentally the compensation of nonlinearities occurring due to out-of-channel “cross-modulation” with a novel predistortion technique using a dual-port modulator. Predistortion compensation results in suppression of distortion by more than 25 dB.
Keywords :
compensation; intermodulation distortion; microwave photonics; optical modulation; radio-over-fibre; channelized RF photonic links; cross-modulation; distortion suppression; dual-port optical modulator; multichannel optical signal processing; nonlinear modulator behavior; nonlinearities compensation; predistortion compensation; wideband radio-frequency signal; Nonlinear optics; Optical distortion; Optical fiber communication; Optical filters; Optical modulation; Predistortion; Radio frequency; Channelization; fiber optics; microwave photonics; phase modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2090040
