Noise and intermodulation distortion reduction in an optical feedforward transmitter

Author

Buxton, B. ; Vahldieck, R.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

fYear

1994

fDate

23-27 May 1994

Firstpage

1105

Abstract

Feedforward linearization of optical transmitters for cable television distribution using low-cost Fabry-Perot lasers is discussed. In our previous work we have used expensive, low-noise and highly linear DFB lasers to satisfy CATV specifications for a 150 channel system. In this paper the potential of the feedforward scheme to not only eliminate harmonic distortion but also to reduce laser relative intensity noise (RIN) is utilized to meet CATV specifications with noisy but low-cost Fabry-Perot lasers. Measurements of the system have shown an average CNR of 50 dB, distortion products lower than -60 dBc and an average RIN reduction of 10 dB.<>

Keywords

cable television; intermodulation; optical communication equipment; optical fibres; CATV specifications; Fabry-Perot lasers; average RIN reduction; cable television distribution; feedforward linearization; harmonic distortion; intermodulation distortion reduction; laser relative intensity noise; noise reduction; optical feedforward transmitter; Cable TV; Distortion measurement; Fabry-Perot; Harmonic distortion; Intermodulation distortion; Laser noise; Noise reduction; Optical distortion; Optical noise; Optical transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1994., IEEE MTT-S International

Conference_Location

San Diego, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-1778-5

Type

conf

DOI

10.1109/MWSYM.1994.335161

Filename

335161