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Stability improvement in a gain-clamped L-band erbium-doped fiber amplifier through hybrid gain control

Authors
  • Wang, Peng1, 1
  • Yang, Jiuru1, 1
  • Zhang, Xudong1
  • 1 Heilongjiang University, China , (China)
Type
Published Article
Journal
Optical Engineering
Publisher
Society of Photo-Optical Instrumentation Engineers
Publication Date
May 01, 2018
Volume
57
Issue
5
Pages
56105–56105
Identifiers
DOI: 10.1117/1.OE.57.5.056105
Source
SPIE
Keywords
Disciplines
  • Paper
License
Yellow

Abstract

The stability of gain-clamped erbium-doped fiber amplifiers (EDFAs) may be affected by the parameter drift of active and passive devices. We propose a hybrid gain-control scheme to enhance the working stability, which consists of an optical dual-fiber-Bragg-grating (FBG)-based linear cavity and an electrical fuzzy-based controller. The principle of optical gain clamping is then depicted and a detailed design about dual-channel fuzzy controller is given. The experimental results show that, in the dual-FBG configuration, with 20.2-dB mean gain, the designed L-band EDFA simultaneously guarantees the ±0.1-dB stability (with 30-dB dynamic range) and the ∼0.4-dB flatness in the range of 1570 to 1610 nm. In addition, under the electrical feedback control, the flatness stability of gain spectrum reaches ±0.18 dB within 60 min and the mean gain stability is about ±0.34 dB within 10-h continuous operation.

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