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Fluoride-based erbium-doped fiber amplifier with inherently flat gain spectrum

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7 Author(s)
Yamada, M. ; NTT Opto-Electron. Labs., Ibaraki, Japan ; Kanamori, Terutoshi ; Terunuma, Y. ; Oikawa, K.
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We successfully developed a fluoride-based Er/sup 3+/-doped fiber amplifier (F-EDFA). An average signal gain of 26 dB was achieved for 8 channel wavelength division multiplexed (WDM) signals in the 1532-1560 nm wavelength region with a gain excursion of less than 1.5 dB at an input signal power of -20 dBm per channel. Furthermore, we studied the amplification characteristics of the F-EDFA for WDM signals. The following experimental results were obtained. (1) For an 8-channel WDM signal in the 1532 to 1560 nm wavelength region, the gain excursion between channels can be suppressed to within 1.5 dB. However, the wavelength region allowing a gain excursion of 1.5 dB, is between 1536-1560 nm for the silica-based Er/sup 3+/-doped fiber amplifier. (2) F-EDFAs have a flat gain region between 1534-1542 nm. The gain excursion of this region is less than 0.2 dB for WDM signals.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 7 )

Date of Publication:

July 1996

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