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Optical Engineering

Gain-flattened two-stage L-band erbium-doped fiber amplifier by weak gain-clamped technique
Author(s): Jiuru Yang; Xiangyu Meng; Changxing Liu; Chunyu Liu
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Paper Abstract

The gain flatness of an L-band erbium-doped fiber amplifier (EDFA) is still an open issue. We improve the conventional single-pass two-stage configuration by placing a fiber Bragg grating (FBG) with the center wavelength at 1529.4 nm. Then, a weak lasing resonance cavity is formed by this FBG and a fiber isolator, which is able to increase the pump conversion efficiency by reflecting the residual amplified spontaneous emission and compressing the raised gain around 1570 nm based on the gain-clamped effect. The experimental results show that by adopting the proposed scheme, the gain un-flatness of the L-band EDFA is controlled within ±0.4  dB in the range of 1570 to 1610 nm, and an ∼29  dB average gain is simultaneously maintained.

Paper Details

Date Published: 18 March 2015
PDF: 5 pages
Opt. Eng. 54(3) 036107 doi: 10.1117/1.OE.54.3.036107
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Jiuru Yang, Heilongjiang Univ. (China)
Xiangyu Meng, Heilongjiang Univ. (China)
Changxing Liu, Heilongjiang Univ. (China)
Chunyu Liu, Heilongjiang Univ. (China)

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