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Flat-gain optimization of Er-Yb co-doped fiber optical amplifier for ultra-dense DWDM system



  1. Department of Electronics and Communication Engineering, IITE, Indus University, Ahmedabad, 382481, India
  2. Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, India


Er-Yb co-doped fiber amplifier has been investigated in this work for the ultra-dense DWDM transmission system. In this work, dominant parameters like fiber length and density concentration of the proposed Er-Yb co-doped fiber amplifier are optimized to achieve the maximum possible flat gain between 1539nm-1563nm wavelengths. This paper also explicates the effects of changing the length and concentration of Er-Yb co-doped fiber to provide the optimum result. It is observed that the gain remains almost flat up to a fiber length of 3m and wavelength between 1539nm-1563nm. Better gain flatness of 0.11dB is perceived at 3m length of the fiber and concentrations of Er=5×1025 m-3; Yb=6×1026 m-3. Furthermore, it is observed that for the low value of density concentration, the difference of gain ripple between 3m and 5m fiber is very less but with an increase in density concentration, the difference of gain ripple increases rapidly. The proposed system has attended higher gain flatness with a very short length of the Er-Yb co-doped fiber compared to other reported systems, making the Er-Yb co-doped fiber amplifier suitable to be incorporated in the long-haul DWDM system because of viability and cost-effectiveness..


Er-Yb co-doped fiber, Gain, Noise figure, BER, Q-factor, WDM.

Submitted at: Oct. 27, 2021
Accepted at: Aug. 10, 2022


DIVYANGNA GANDHI, SHILPI GUPTA, Flat-gain optimization of Er-Yb co-doped fiber optical amplifier for ultra-dense DWDM system, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 304-311 (2022)