Title :
Long-haul WDM transmission system by use of high alumina codoped EDFAs and gain-equalizers
Author :
Naito, Takao ; Shimojoh, Naomasa ; Terahara, Takafumi ; Tanaka, Toshiki ; Chikama, Terumi ; Suyama, Masuo
Author_Institution :
Fujitsu Labs. Ltd., Kawasaki, Japan
Abstract :
To expand the signal wavelength bandwidth in a long-haul, large-capacity WDM transmission system, we developed a high alumina codoped EDFA with broadband, high output power, and low noise figure using a 1480-nm pump laser. We applied gain-equalizers (GEQs) using Mach-Zehnder type optical filters with long free-spectral ranges to accurately compensate for the gain-wavelength characteristics of the EDFA. We investigated the signal wavelength bandwidth expanded by using the above EDFAs and GEQs. The achieved signal wavelength bandwidth after 10000-km transmission was 18 nm. We successfully transmitted 170 Gbit/s (32 channel×5.332 Gbit/s) WDM signals over 9879 km and 700 Gbit/s (66 channel×10.66 Gbit/s) WDM signals over 2212 km
Keywords :
alumina; equalisers; optical communication equipment; optical fibre amplifiers; optical filters; wavelength division multiplexing; 10.66 Gbit/s; 10000 km; 1480 nm; 170 Gbit/s; 18 nm; 2212 km; 5.332 Gbit/s; 700 Gbit/s; 9879 km; Mach-Zehnder type optical filters; WDM signals; broadband system; gain-equalizers; gain-wavelength characteristics compensation; high alumina codoped EDFA; high output power; large-capacity transmission system; long free-spectral ranges; long-haul WDM transmission system; low noise figure; pump laser; signal wavelength bandwidth expansion; Bandwidth; Erbium-doped fiber amplifier; Laser excitation; Laser noise; Noise figure; Optical filters; Power generation; Power lasers; Pump lasers; Wavelength division multiplexing;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.776877
