A method for reducing multipath interference noise

Author

Woodward, S.L. ; Darcie, T.E.

Author_Institution

Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA

Volume

6

Issue

3

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

450

Lastpage

452

Abstract

One source of noise in optical communication systems is multipath interference (MPI)-intensity noise caused by multiple discrete reflections or double Rayleigh backscatter (DRB). MPI converts phase noise to intensity noise, which can cause significant impairments in analog lightwave systems transmitting CATV signals. We have found that by dithering the laser frequency by several gigahertz at kilohertz frequencies this noise can be reduced. We have demonstrated this technique using a DFB laser.<>

Keywords

Rayleigh scattering; backscatter; cable television; distributed feedback lasers; interference suppression; light reflection; optical links; television interference; 1.3 micron; 1.5 micron; CATV signal; DFB laser; analog lightwave systems; dithering; double Rayleigh backscatter; intensity noise; laser frequency; multipath interference noise reduction; multiple discrete reflections; noise source; optical communication systems; phase noise; Acoustic reflection; Backscatter; Frequency; Interference; Laser noise; Noise reduction; Optical fiber communication; Optical noise; Optical reflection; Phase noise;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.275515

Filename

275515