Flat-Gain Single-Stage Amplifier Using High Concentration Erbium Doped Fibers in Single-Pass and Double-Pass Configurations

• Main Authors: Hamida, B. A., Latiff, A. A., Cheng, X. S., Ismail, M. A., Naji, W., Khan, S., AL-Khateeb, W., Ahmed, H., Harun, S. W.
• Format: Conference Proceeding
• Language: English
• Subjects: Erbium-doped fiber amplifier; Fiber gratings; Gain; L-band; Noise figure; Optical fiber amplifiers
• ISSN: 2156-8464; 2156-8480
• DOI: 10.1109/SOPO.2012.6271113

A flat gain Erbium-doped fiber amplifier (EDFA) is demonstrated using a gain media of high concentration Silica-based erbium doped fiber (EDF). The amplifier has one stage comprising a 1.5 m and 9 m long EDF optimized for C-band and L-band operations respectively, in a single-pass and double-pass configuration. The CFBG is used at the end of EDF to allow a double propagation of signal and thus increases the attainable gain in both C- and L-band spectra. At input signal power of -30 dB, the averaged flat gain of approximately 25 dB over C-band region and the averaged flat gain of approximately 30 dB over L-band region are achieved by the double-pass amplifier with gain variation approximately ±3 dB. The corresponding noise figure is maintained at 5 dB with noise figure variation ±0.5 dB.