Design and fabrication of an intrinsically gain flattened Erbium doped fiber amplifierReport as inadecuate




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1 IIT Delhi - Indian Institute of Technology New Delhi 2 Central Glass and Ceramic Research Institute 3 LPMC - Laboratoire de physique de la matière condensée

Abstract : We report design and subsequent fabrication of an intrinsically gain flattened Erbium doped fiber amplifier EDFA based on a highly asymmetrical and concentric dual-core fiber, inner core of which was only partially doped. Phase-resonant optical coupling between the two cores was so tailored through optimization of its refractive index profile parameters that the longer wavelengths within the C-band experience relatively higher amplification compared to the shorter wavelengths thereby reducing the difference in the well-known tilt in the gains between the shorter and longer wavelength regions. The fabricated EDFA exhibited a median gain ≥28 dB gain excursion below ±2.2 dB within the C-band when 16 simultaneous standard signal channels were launched by keeping the I-P level for each at ―20 dBm- channel. Such EDFAs should be attractive for deployment in metro networks, where economics is a premium, because it would cut down the cost on gain flattening filter head.

Keywords : Erbium doped fiber amplifiers Gain flattened EDFA Modified chemical vapor deposition technique





Author: B. Nagaraju - M.C. Paul - M. Pal - A. Pal - Ravi K. Varshney - B.P. Pal - S.K. Bhadra - Gérard Monnom - Bernard Dussardier -

Source: https://hal.archives-ouvertes.fr/



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