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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 19,
  • Issue 11,
  • pp. 1759-
  • (2001)

A Channel-Number Insensitive Erbium-Doped Fiber Amplifier With Automatic Gain and Power Regulation Function

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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.

[IEEE ]

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