Gain-flattened hybrid EDFA operating in C + L band with parallel pumping distribution technique

• Published in: IET optoelectronics 2020-12, Vol.14 (6), p.447-451
• Main Authors: Al-Azzawi, Alabbas A, Almukhtar, Aya A, Dhar, Anirban, Paul, Mukul C, Ahmad, Harith, Altuncu, Ahmet, Apsari, Retna, Harun, Sulaiman Wadi
• Format: Article
• Language: English
• Subjects: 0.5‐m long hafnium bismuth erbium codoped fibre; amplifier complexity; bismuth; C + L band hybrid erbium‐doped fibre amplifier; erbium; gain 10.9 dB; gain 15.5 dB; gain 19.2 dB; gain‐flattened hybrid EDFA; hafnium; input signal powers; laser noise; multiwavelength input source; noise figure; noise figure 4.7 dB; noise figure 5.4 dB; noise figure 6.4 dB; optical fibre amplifiers; optical pumping; parallel pumping distribution technique; Research Article; size 0.5 m; size 4 m; two‐stage configuration; zirconia‐based EDF; zirconium compounds; ZrO2
• ISSN: 1751-8768; 1751-8776
• DOI: 10.1049/iet-opt.2020.0072

A novel C + L band hybrid erbium-doped fibre amplifier (EDFA) using a two-stage configuration was proposed and demonstrated experimentally. The amplifier is composed of a 0.5-m long hafnium bismuth erbium co-doped fibre (EDF) to provide gain within the C-band and a 4-m long zirconia-based EDF to provide gain within the L-band. The proposed amplifier was examined based on the multi-wavelength input source. A parallel pumping distribution technique was used to mitigate the amplifier complexity. The C + L band amplifier achieved a gain flattening of over 55 nm bandwidth for the three levels of the input powers. A gain-flattening of roughly 10.9, 15.5, and 19.2 dB were obtained, respectively, for the input signal powers of −5, −10, and −15 dBm. An average noise figure of 6.4, 5.4, and 4.7 dB was achieved, respectively, for the input signal powers of −5, −10, and −15 dBm.