Title :
Multichannel amplification utilizing an Er3+-doped fiber amplifier
Author :
Inoue, Kyo ; Toba, Hiromu ; Nosu, Kiyoshi
Author_Institution :
NTT Lab., Kanagawa, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
An Er3+-doped fiber amplifier for multichannel systems was studied from the viewpoint of clarifying the ultimate capacity of the applicable number of channels. In these experiments, 10-GHz spaced 100-channel common amplification was carried out in a 622-Mb/s frequency-shift-keying (FSK) direct detection scheme, together with measurement of the amplifier characteristics. Bit-error-rate measurements show that the power-penalty characteristics for 100-channel amplification are the same as for one-channel amplification. Based on the experimental results, possible channel capacity is discussed. There are two possible factors limiting channel capacity in multichannel amplification of fiber amplifiers: signal-gain bandwidth and amplifier noise. Calculations using the amplifier parameters obtained during the experiments reveal that signal gain bandwidth is the main factor limiting channel capacity in the amplifier used
Keywords :
erbium; fibre lasers; frequency shift keying; optical communication equipment; optical links; optical modulation; 100-channel common amplification; 622 Mbit/s; Er3+-doped fiber amplifier; FSK; amplifier noise; bit-error-rate measurements; channel number capacity; direct detection scheme; fiber amplifiers; frequency-shift-keying; multichannel amplification; multichannel systems; power-penalty characteristics; signal-gain bandwidth; ultimate capacity; Bandwidth; Channel capacity; Crosstalk; Erbium; Light sources; Optical amplifiers; Optical fiber amplifiers; Optical fiber polarization; Optical noise; Power amplifiers;
Journal_Title :
Lightwave Technology, Journal of
