Title :
Gain-flattened Er/sup 3+/-doped fiber amplifier for a WDM signal in the 1.57-1.60-μm wavelength region
Author :
Ono, H. ; Yamada, M. ; Ohishi, Yasutake
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
5/1/1997 12:00:00 AM
Abstract :
A gain-flattened Er/sup 3+/-doped silica-based fiber amplifier (EDFA) has been constructed for a 1.58-μm band WDM signal. This EDFA exhibits uniform amplification characteristics with a gain excursion of 0.9 dB for a four-channel WDM signal in the 1.57-1.60 μm wavelength region. The average signal gain and the noise figure for the WDM signal are 29.5 dB and less than 6.3 dB, respectively. The use of this EDFA in parallel with a 1.55-μm band EDFA will expand the WDM transmission wavelength region.
Keywords :
erbium; fibre lasers; infrared sources; laser transitions; optical transmitters; wavelength division multiplexing; /spl mu/m wavelength region; 1.57 to 1.6 mum; EDFA; Er/sup 3+/-doped silica-based fiber amplifier; WDM signal; WDM transmission wavelength region; average signal gain; four-channel WDM signal; gain excursion; gain-flattened Er/sup 3+/-doped fiber amplifier; noise figure; uniform amplification characteristics; Absorption; Bidirectional control; Diode lasers; Erbium; Erbium-doped fiber amplifier; Laser excitation; Noise figure; Optical fiber devices; Optical refraction; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
