Asymmetric channel gain and crosstalk in traveling wave optical amplifiers

Author

Habbab, Isam M I ; Agrawal, Govind P.

Author_Institution

AT&T Bell Lab., Holmdel, NJ, USA

Volume

7

Issue

9

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

1351

Lastpage

1359

Abstract

Previous studies have shown that in multichannel optical amplification using a traveling wave amplifier, nonlinear frequency mixing effects can arise due to the modulation of the carrier density. It was shown that in the small-signal case, the carrier density modulation leads to a weak asymmetry in the gains experienced by individual channels. The authors extend the theoretical results by including the effects of gain saturation. They find, in the two-channel case, that the gain asymmetry can be as large as 10 dB depending on the channel separation, carrier lifetime, and input powers. The authors discuss the implications of this on the choice of modulation scheme

Keywords

crosstalk; laser theory; optical modulation; optical saturation; semiconductor junction lasers; asymmetric channel gain; carrier density modulation; carrier lifetime; channel separation; crosstalk; gain asymmetry; gain saturation; input powers; multichannel optical amplification; nonlinear frequency mixing; small-signal case; traveling wave optical amplifiers; weak asymmetry; Charge carrier density; Frequency; Nonlinear optics; Optical amplifiers; Optical crosstalk; Optical mixing; Optical modulation; Optical saturation; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.50714

Filename

50714