Title :
Optical linearization for intensity-modulated analog links employing equivalent incoherent combination technique
Author :
Dai, Jian ; Xu, Kun ; Duan, Ruimin ; Cui, Yan ; Wu, Jian ; Lin, Jintong
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A novel optical linearization approach for intensity modulated analog links based on equivalent incoherent combination technique has been experimentally demonstrated. The highlight of this scheme is the destructive combination for the distortion signals in electrical domain, which can be easily achieved through a commercial balanced photodetector pair. A reduction of 25dB in third-order intermodulation distortion has been achieved. Besides, compared with conventional single modulator case with the same gain, 16dB enhancement in SFDR can be estimated.
Keywords :
intensity modulation; intermodulation distortion; linearisation techniques; optical links; optical modulation; photodetectors; commercial balanced photodetector pair; distortion signals; electrical domain; equivalent incoherent combination technique; intensity-modulated analog links; optical linearization approach; single modulator; third-order intermodulation distortion; Detectors; Modulation; Optical attenuators; Optical distortion; Optical fiber communication; RF signals; Radio frequency; Analog optical link; intensity modulator; optical linearization; third-order intermodulation distortion;
Conference_Titel :
Microwave Photonics, 2011 International Topical Meeting on & Microwave Photonics Conference, 2011 Asia-Pacific, MWP/APMP
Conference_Location :
Singapore
Print_ISBN :
978-1-61284-716-0
DOI :
10.1109/MWP.2011.6088712
