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Experimental characterization of a dynamically gain-flattened erbium-doped fiber amplifier

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4 Author(s)
Lee, Y.W. ; Telecommun. R&D Center, Samsung Electron. Co., Suwon, South Korea ; Nilsson, J. ; Hwang, S.T. ; Kim, S.J.

We have designed and experimentally characterized an erbium doped fiber amplifier (EDFA) which possesses a wavelength-independent gain spectrum, independent of the operating level of the gain (dynamic gain flatness), and without requiring any gain-level-dependent control of any parameters. In the wavelength range 1542-1552 nm, the gain was flat to within the experimental uncertainties of /spl plusmn/0.3 dB even as the gain level changed by 17 dB. The EDFA was based on a low-Al-content alumino-germanosilicate EDF and a Mach-Zehnder filter. We believe that this type of EDFA, which has not been demonstrated before, can significantly simplify the design of amplified wavelength-division multiplexing (WDM) transmission systems and increase the robustness of long-distance WDM transmission.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 12 )