Gain clamping performance of Hafnia–bismuth–erbium co-doped fibre amplifier using lasing controlled structure with FBG

• Main Authors: Zulkipli, Nur Farhanah, Sadik, Şerıf Ali, Durak, Fırat Ertaç, Paul, Mukul Chandra, Altuncu, Ahmet, Harun, Sulaiman Wadi
• Format: Article
• Published: Taylor & Francis 2021
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/25972/; https://doi.org/10.1080/09500340.2021.1912424
• Institution: Universiti Malaya

In this study, the gain clamping performance of Hafnia-bismuth-erbium co-doped fibre amplifier (HB-EDFA) using a lasing controlled structure with fibre Bragg grating (FBG) pair is presented. First, the gain and noise figure (NF) characteristics of a bidirectionally pumped HB-EDFA with very short lengths of heavily doped fibre are presented regarding its critical design parameters such as HB-EDF length, pump power, input signal power and signal wavelength. Then, the gain clamping performance of a bidirectionally pumped HB-EDFA having a C-band FBG pair with Bragg wavelengths of 1534 and 1542 nm is experimentally analysed. A good gain clamping capability was obtained using the proposed bidirectionally HB-EDFA design which has resulted in a dynamic signal input power range of 25 dB at 16 dB signal gain for 1.6 m HB-EDF length, and a wider dynamic signal input power range of 30 dB at 10 dB signal gain for 1.1 m HB-EDF length. © 2021 Informa UK Limited, trading as Taylor & Francis Group.