Practical TV channel capacity of lightwave multichannel AM SCM systems limited by the threshold nonlinearity of laser diodes

Author

Ching, C.J. ; Jacobs, Ira

Author_Institution

Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

4

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

289

Lastpage

292

Abstract

Experimental measurements of clipping-induced nonlinear distortion due to overmodulation of laser diodes in multichannel AM SCM (amplitude modulated subcarrier multiplexed) systems are shown to be in good agreement with recent theory and simulation results. These results are then used to show that the number of channels, consistent with CATV (cable television) distortion and noise requirements in the presence of threshold nonlinearity, relative intensity noise, and receiver thermal noise, are higher than previous estimates. The sensitivity of these results with respect to the carrier-to-noise ratio requirement and the received optical power at the photodetector is also discussed.<>

Keywords

amplitude modulation; cable television; multiplexing; optical links; semiconductor junction lasers; CATV; TV channel capacity; amplitude modulated subcarrier multiplexed; cable television; carrier-to-noise ratio; clipping-induced nonlinear distortion; distortion; laser diodes; lightwave multichannel AM SCM systems; noise requirements; overmodulation; photodetector; received optical power; receiver thermal noise; relative intensity noise; threshold nonlinearity; Amplitude modulation; Cable TV; Channel capacity; Diode lasers; Distortion measurement; Nonlinear distortion; Optical distortion; Optical noise; Optical receivers; TV receivers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.122396

Filename

122396