A channel-number insensitive erbium-doped fiber amplifier with automatic gain and power regulation function

• Published in: Journal of lightwave technology Vol. 19; no. 11; pp. 1759 - 1767
• Main Authors: Motoshima, K., Suzuki, N., Shimizu, K., Kasahara, K., Kitayama, T., Yasui, T.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2001; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplification; Amplifiers; Applied sciences; Automatic logic units; Channels; Circuit properties; Circuit simulation; Control; Electric, optical and optoelectronic circuits; Electronics; Erbium-doped fiber amplifier; Exact sciences and technology; Feedback; Feedback circuits; Fibers; Fluctuations; Gain; Gain control; Integrated optics. Optical fibers and wave guides; Level control; Optical and optoelectronic circuits; Power control; Power generation; Repeaters; Simulation; Feedback; Optical telecommunication; Power regulation; Wavelength division multiplexing; Fiber amplifier; Modeling; Automatic gain control
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/50.964078

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.