A Simple, Linearized, Phase-Modulated Analog Optical Transmission System

Author

Haas, Bryan M. ; Murphy, Thomas E.

Author_Institution

Lab. for Phys. Sci., College Park, MD

Volume

19

Issue

10

fYear

2007

fDate

5/15/2007 12:00:00 AM

Firstpage

729

Lastpage

731

Abstract

We describe and experimentally demonstrate a new technique to suppress third-order intermodulation distortion (IMD) in a coherent phase-modulated RF optical link. The anisotropic electrooptic coefficient of lithium niobate is exploited to simultaneously modulate orthogonally polarized fields. These fields are then combined to eliminate the third-order distortion. This technique uses a single phase modulator, requiring no external bias or control, for a highly linear photonic microwave relay. The resulting suboctave dynamic range is limited by fifth-order IMD instead of third-order IMD

Keywords

electro-optical effects; intermodulation distortion; light coherence; lithium compounds; microwave photonics; optical distortion; optical fibre polarisation; optical modulation; phase modulation; radio-over-fibre; LiNbO₃; analog optical transmission system; anisotropic electrooptic coefficient; coherent optical link; linear photonic microwave relay; linearized optical transmission system; lithium niobate crystal; orthogonally polarized fields; phase modulation; phase-modulated optical link; radiofrequency optical link; suboctave dynamic range; third-order intermodulation distortion; Anisotropic magnetoresistance; Electrooptic modulators; Geometrical optics; Intermodulation distortion; Lithium niobate; Optical distortion; Optical fiber communication; Optical modulation; Optical polarization; Radio frequency; Distortion; heterodyning; intermodulation distortion (IMD); phase modulation; polarization;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.895887

Filename

4156228