Title :
Semiconductor laser optical amplifiers for multichannel coherent optical transmission
Author :
Dietrich, Erik ; Enning, Bernhard ; Grosskopf, Gerd ; Küller, Lothar ; Ludwig, Reinhold ; Molt, Rudolf ; Patzak, Erwin ; Weber, Hans G.
Author_Institution :
Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, West Germany
fDate :
12/1/1989 12:00:00 AM
Abstract :
The application of semiconductor laser optical amplifiers in multichannel coherent optical transmission systems is investigated. The amplifiers considered (λ=1.3 μm) exhibit a gain of 24 dB at a grain ripple <2 dB and a 3-dB bandwidth of about 4000 GHz. The characteristics of these amplifiers and transmission experiments with these amplifiers are described. The investigations concern noise accumulation in an amplifier chain, generation of echoes due to backward gain in cascaded amplifiers, crosstalk in multichannel transmission, and the effect of gain saturation due to spontaneous emission. A good fit is shown between the advantages of multichannel coherent optical transmission systems and the properties of semiconductor laser optical amplifiers, which are very promising for future long-haul optical transmission systems
Keywords :
crosstalk; electron device noise; optical communication equipment; semiconductor junction lasers; 1.3 micron; 24 dB; 4000 GHz; amplifier chain; backward gain; cascaded amplifiers; crosstalk; gain saturation; long-haul optical transmission; multichannel coherent optical transmission; multichannel transmission; noise accumulation; semiconductor laser optical amplifiers; spontaneous emission; Bandwidth; Gain; Laser applications; Optical amplifiers; Optical crosstalk; Optical noise; Optical saturation; Semiconductor lasers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
