Title :
Equalization of nonuniform EDFA gain using a fiber-loop mirror
Author :
Cai, J.X. ; Feng, K.M. ; Chen, X.P. ; Willner, A.E.
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
We have experimentally demonstrated cascaded EDFA gain equalization using a fiber-loop mirror (FLM) acting as a linear wavelength filter. By changing the intra-loop polarization, the FLM passband center wavelength can be tuned. Additionally, there is some ability to change the bandwidth and filter slope of the FLM. The FLM is used to equalize the nonuniform gain of a cascade of EDFAs. After 1500 km, the power differential is reduced from 30 to 2 dB for three WDM channels covering a 9-nm wavelength range.
Keywords :
band-pass filters; equalisers; erbium; fibre lasers; mirrors; optical communication equipment; optical fibre filters; optical fibre polarisation; wavelength division multiplexing; 1500 km; EDFA cascade; FLM passband center wavelength; WDM channels; bandwidth; cascaded EDFA gain equalization; fiber-loop mirror; filter slope; intra-loop polarization; linear wavelength filter; nonuniform EDFA gain equalization; nonuniform gain; power differential; tuning; wavelength range; Band pass filters; Bandwidth; Birefringence; Erbium-doped fiber amplifier; Mirrors; Optical fiber couplers; Optical fiber filters; Optical fiber polarization; Passband; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
