Title :
Gain clamping in double-pass L-band EDFA
Author :
Harun, S.W. ; Samsuri, N. Md ; Ahmad, H.
Author_Institution :
Fac. of Eng., Multimedia Univ.
Abstract :
Gain clamping in double-pass long-wavelength band erbium-doped fiber amplifier (L-band EDFA) is demonstrated using a ring resonator. This new design provides an improved gain characteristics as well as an efficient tune-ability. The gain is clamped at 11.5 dB with gain variation of less than 0.1 dB from input signal power of -40 to -6 dBm by setting the variable attenuation setting (VOA) at 8 dB. Also, the clamped-gain level can be controlled in the range from 4.7 to 20.9 dB by varying the VOA settings from 0 to 20 dB. However, the proposed gain-clamped amplifier suffers noise figure degradation as compared to open-ring amplifier due to the intense ring laser light, which counter-propagating through the EDF
Keywords :
erbium; optical fibre amplifiers; optical resonators; 0 to 20.9 dB; clamped-gain level; double-pass L-band EDFA; gain clamping; gain variation; gain-clamped amplifier; long-wavelength band erbium-doped fiber amplifier; noise figure degradation; open-ring amplifier; ring laser light; ring resonator; variable attenuation setting; Clamps; Degradation; Erbium-doped fiber amplifier; Gain; L-band; Laser noise; Noise figure; Optical attenuators; Optical ring resonators; Ring lasers;
Conference_Titel :
TENCON 2004. 2004 IEEE Region 10 Conference
Conference_Location :
Chiang Mai
Print_ISBN :
0-7803-8560-8
DOI :
10.1109/TENCON.2004.1414709
