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Gain equalization by mitigating self-filtering effect in a chain of cascaded EDFA's for WDM transmissions

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3 Author(s)
Jinghui Li ; Dept. of Electr. Eng., Ottawa Univ., Ont., Canada ; Khaleghi, F. ; Kavehrad, Mohsen

A simple method of alternatively using high-inversion and moderate-inversion erbium-doped fiber amplifiers (EDFA's) in an optical amplifier chain is presented to mitigate the self-filtering effect and equalize both signal power and signal-to-noise ratio (SNR) of multiple wavelength channels in wavelength-division multiplexing (WDM) transmission systems. The performance of the compensated system with alternatively used high- and moderate-inversion amplifiers is compared with the uncompensated ones where only moderate- or high-inversion amplifiers are employed. The result shows that the compensated system has a flatter gain profile, a lesser signal power spread, and SNR degradation

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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 11 )