npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Phys.: Sae Mulli 2019; 69: 107-112

Published online January 31, 2019

Copyright © New Physics: Sae Mulli.

Optimization of a C-band Erbium-Doped Fiber Amplifier for Wavelength Division Multiplexing Optical Communications Using 64 Channels

Bo-Hun CHOI*

Department of Materials Physics, Dong-A University, Busan 49315, Korea


Received: September 14, 2018; Revised: October 12, 2018; Accepted: December 11, 2018

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


A C-band amplifier for optical communications using 64 wavelength division mutiplexing channels was analyzed for its optimal structural configuration. This amplifier was composed of two erbium-doped fiber amplifiers (EDFAs) for two-staged amplification and a gain-flattened filter. The first EDFA had maximally four pump laser diodes (LDs) for comparison of six different pumping conditions. The length of an erbium-doped fiber in the second EDFA was optimized for the first EDFA's output. This C-band EDFA had a 21 dBm ouput, a flat 19 dB gain in the C-band with a maximum 0.5 dB deviation, and a high noise figure of 7.5 dB.

Keywords: Optical communications, Erbium-doped fiber amplifier, Optical fiber sensor

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