Title :
A channel-number insensitive erbium-doped fiber amplifier with automatic gain and power regulation function
Author :
Motoshima, Kuniaki ; Suzuki, Naoki ; Shimizu, Katsuhiro ; Kasahara, Kumio ; Kitayama, Tadayoshi ; Yasui, Tadahiko
Author_Institution :
Mitsubishi Electr. Corp., Kanagawa, Japan
fDate :
11/1/2001 12:00:00 AM
Abstract :
The design scheme for an erbium-doped fiber amplifier (EDFA) with automatic channel-by-channel gain and power regulation function is discussed with much emphasis on the pump power control scheme and the requirement for feedback circuitry. Based on both wavelength and time-resolved simulation technique, an amplifier repeater employing novel high-speed automatic gain control (AGC) and automatic level control (ALC) functions is designed and implemented. The AGC and ALC scheme can suppress the transient power fluctuation of a surviving channel caused by adding or dropping all other channels less than 0.45 dB and keep output power constant over 9-dB input power range
Keywords :
automatic gain control; erbium; fluctuations; laser feedback; optical fibre amplifiers; optical repeaters; telecommunication channels; telecommunication network reliability; transients; Er-doped channel-number insensitive fiber amplifier; amplifier repeater; automatic channel-by-channel gain; automatic gain; automatic level control; channel dropping; feedback circuitry; high-speed automatic gain control; power regulation function; pump power control scheme; surviving channel; time-resolved simulation technique; Automatic logic units; Circuit simulation; Erbium-doped fiber amplifier; Feedback circuits; Fluctuations; Gain control; Level control; Power control; Power generation; Repeaters;
Journal_Title :
Lightwave Technology, Journal of
