High gain L-band erbium-doped fiber amplifier with two-stage double-pass configuration

• Main Authors: Harun, Sulaiman Wadi, Tamchek, Nizam, Poopalan, Prabakaran, Ahmad, Harith
• Format: Article
• Published: Indian Academy of Sciences 2003
• Subjects: Q Science (General); QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/19634/; http://dx.doi.org/10.1007/BF02704513

An experiment on gain enhancement in the long wavelength band erbium-doped fiber amplifier (L-band EDFA) is demonstrated using dual forward pumping scheme in double-pass system. Compared to a single-stage single-pass scheme, the small signal gain for 1580 nm signal can be improved by 13.5 dB. However, a noise figure penalty of 2.9 dB was obtained due to the backward C-bund ASE from second stage and the already amplified signal from the first pass that extracting energy from the forward C-band ASE. The maximum gain improvement of 13.7 dB was obtained at a signal wavelength of 1588 nm while signal and total pump powers were fixed at -30 dBm and 92 mW, respectively.