Experimental Investigation of pump propagating direction in double-pass Er3+-doped fiber amplifiers

• Main Authors: Khairi, K.A., Adikan, Faisal Rafiq Mahamd, Naji, A.W., Al-Mansoori, M.H., Mahdi, M.A.
• Format: Article
• Published: Institute of Electronics, Information and Communication Engineers (IEICE) 2005
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/4689/

In this paper, the impacts of pump propagating direction in double-pass Erbium-doped fiber amplifier are experimentally demonstrated. The double-pass optical amplifier architecture is constructed using a fiber loop mirror that consists of a circulator to reflect the amplified signal back into the Erbium-doped fiber. The gain and noise figure performance of the double-pass optical amplifier is not affected by the direction of pump light, forward- or backward-pumped scheme. The population inversion along the Erbium-doped fiber is locked to a specific fraction due to the double-pass amplification of the signal.