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

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

230

Lastpage

233

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/MWP.2011.6088712

Filename

6088712