Title :
Cumulative waveform distortion in cascaded optical amplifier repeaters for multigigabit IM/DD systems
Author :
Tomofuji, H. ; Nishimoto, H. ; Horimatsu, T. ; Minami, T. ; Touge, T.
Author_Institution :
Fujitsu Lab. Ltd., Kawasaki, Japan
Abstract :
An analysis was conducted of a cumulative pattern-dependent waveform distortion in cascaded semiconductor laser and Er/sup 3+/-doped fiber amplifiers. At 2.5 Gb/s, cumulative waveform distortion limits the number of cascaded amplifiers to about 20 for the semiconductor amplifiers. The Er/sup 3+/-doped fiber amplifier is relatively unaffected-over 100 stages can be cascaded. The Er/sup 3+/ amplifier is seen to be the better choice for long-haul multigigabit systems.<>
Keywords :
erbium; fibre lasers; optical communication equipment; repeaters; semiconductor junction lasers; 2.5 Gbit/s; Er/sup 3+/-doped fiber amplifiers; cascaded optical amplifier repeaters; cascaded semiconductor laser; cumulative pattern-dependent waveform distortion; multigigabit intensity modulation direct detection systems; Erbium; Fiber lasers; Laser noise; Optical amplifiers; Optical distortion; Optical fiber amplifiers; Pattern analysis; Quantum cascade lasers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
