Abstract
This paper presents the amplification and shaping characteristics of optical beat signal using a combination of non-linear fiber loop mirror (NFLM) and erbium doped fiber amplifier (EDFA). Power levels of beat signal for peak transmittivity ( T p) to be unity have been calculated with an amplifier inside NFLM (NFLM-I) and outside NFLM (NFLM-O). For coupling ratio f<0.35 in the loop mirror, NFLM-O is found to be a more appropriate choice for shaping of the beat signal. We investigate the effect of incorporating saturable gain and fiber losses in computing accurate peak power levels for T p. Neglecting these effects will drastically reduce T p. In addition, it was found that the amplification and shaping characteristics of beat signal can be made remarkably insensitive to increase in input power levels when gain saturation of EDFA is included.
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