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

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6 Author(s)
Motoshima, K. ; Mitsubishi Electr. Corp., Kanagawa, Japan ; Suzuki, N. ; Shimizu, K. ; Kasahara, K.
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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

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Lightwave Technology, Journal of  (Volume:19 ,  Issue: 11 )