The performance of a traveling-wave-type semiconductor laser amplifier as a booster in multiwavelength simultaneous amplification

Author

Koga, Masafumi ; Matsumoto, Takao

Author_Institution

Transmission Syst. Lab., NTT, Kanagawa, Japan

Volume

8

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

105

Lastpage

112

Abstract

In this study, the theoretical worst and the average interchannel crosstalk are shown as a function of normalized input power. The validity of normalization by saturation input power is confirmed by experimental data. This normalized input power must be set below -20 and -10 dB for multiwavelength numbers of 20 and 4, respectively, to attain an average interchannel crosstalk of under -10 dB. The optical loss, including interchannel crosstalk, that can be compensated by a traveling-wave-type semiconductor laser amplifier (TWA) is analyzed. The experimental results indicate that the compensable optical loss could be evaluated by using the average interchannel crosstalk in multiwavelength transmission system design. Applying a TWA as a preamplifier is more effective in systems that include excess optical loss in the receiver

Keywords

crosstalk; laser beam applications; optical communication equipment; optical losses; semiconductor junction lasers; average interchannel crosstalk; compensable optical loss; laser amplification booster; multiwavelength numbers; multiwavelength simultaneous amplification; multiwavelength transmission system design; normalized input power; optical loss; optical loss compensation; preamplifier; saturation input power; traveling-wave-type semiconductor laser amplifier; worst interchannel crosstalk; Laser theory; Optical crosstalk; Optical losses; Optical receivers; Optical saturation; Preamplifiers; Propagation losses; Semiconductor lasers; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.45936

Filename

45936