Title :
Less than 0.19-dB transient gain excursion AGC-EDFA with digital control for 20-channel add/drop equivalent operation
Author :
Sato, Norihiko ; Ota, Kazuya ; Mishima, Naoyuki ; Oikawa, Yoichi ; Shiga, Noriyasu
Author_Institution :
Trimatiz Ltd., Ichikawa, Japan
Abstract :
We have developed a digitally controlled AGC-EDFA by combining an FF-controlled pump-LD and an FB-controlled VOA. An FPGA is used to finely tune the gain setting of the pump current with a wide dynamic range for input burst signals and to precisely configure the gain and cutoff bandwidth for the loop control of the VOA. We realized a gain excursion of less than 0.19 dB at the AGC-EDFA with the VOA for a 20-channel add/drop equivalent operation. We believe 0.19 dB to be the smallest value yet reported.
Keywords :
automatic gain control; digital control; erbium; feedback; feedforward; field programmable gate arrays; optical attenuators; optical communication equipment; optical control; optical fibre amplifiers; semiconductor lasers; telecommunication control; AGC-EDFA; FPGA; VOA; add/drop equivalent operation; digital control; feedback controlled optical amplifier; feedforward controlled pump laser diode; input burst signal; pump current; transient gain excursion; variable optical attenuator; Erbium-doped fiber amplifier; Gain; Optical feedback; Optical packet switching; Optical pumping; Transient analysis; Transient response;
Conference_Titel :
Optical Fiber Communication Conference and Exposition (OFC/NFOEC), 2011 and the National Fiber Optic Engineers Conference
Conference_Location :
Los Angeles, CA
Print_ISBN :
978-1-4577-0213-6
