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Flat-gain optical amplification within 70 nm wavelength band using 199 cm long hybrid erbium fibers

A. A. ALMUKHTAR1,2, A. A. AL-AZZAWI1,2, Z. JUSOH3, N. F. RAZAK4, P. H. REDDY5,8, D. DUTTA5, S. DAS5, A. DHAR5, M. C. PAUL5, H. AHMAD6, M. YASIN7,* , S. W. HARUN1,*


  1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
  2. Department of Computer Techniques Engineering, Al-Esraa University College, Baghdad, Iraq
  3. Faculty of Electrical Engineering, Universiti Teknologi Mara (Terengganu), 23000 Dungun, Terengganu, Malaysia
  4. Pusat PERMATApintar® Negara, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor
  5. Fiber Optics and Photonics Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata-700032, India
  6. Photonics Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia
  7. Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya (60115) Indonesia
  8. Academy of Scientific and Innovative Research (AcSIR), CSIR-CGCRI Campus, Kolkata


A flat-gain amplification covering a wideband wavelength window was accomplished by using dual-stage erbium doped fiber amplifier (EDFA). The amplifier was constructed by combining two different active fibers; Bismuth erbium doped fiber (Bi-EDF) and Hafnium-bismuth erbium doped fiber (HB-EDF) that provide amplification in C- and L-band region, respectively. It employed only 199 cm of the total active fibers in double-pass parallel configuration. The 1480 nm pump powers were fixed at 90 and 170 mW for first and second stages, respectively. At input signal power of -30 dBm, the gain of the amplifier varied from 13 to 27 dB within a wavelength region from 1535 to 1590 nm. At input signal power of -10 dB, a flat gain of about 14 dB was realized with gain fluctuation less than 1 dB over 70 nm wavelengths from 1535 to 1605 nm. On the other hand, the corresponding noise figures were maintained below 13 dB over wideband region for both input signal powers..


Wideband optical amplifier, Erbium-doped fiber amplifier, Hafnium Bismuth Erbium co-doped fiber.


A. A. ALMUKHTAR, A. A. AL-AZZAWI, Z. JUSOH, N. F. RAZAK, P. H. REDDY, D. DUTTA, S. DAS, A. DHAR, M. C. PAUL, H. AHMAD, M. YASIN, S. W. HARUN, Flat-gain optical amplification within 70 nm wavelength band using 199 cm long hybrid erbium fibers, Optoelectronics and Advanced Materials - Rapid Communications, 13, 7-8, July-August 2019, pp.391-395 (2019).

Submitted at: Nov. 21, 2018

Accepted at: Aug. 20, 2019