An efficient S-band erbium-doped fiber amplifier using double-pass configuration

Abstract

An efficient short wavelength band erbium-doped fiber amplifier (S-band EDFA) is proposed and demonstrated using doublepass configuration. This amplifier provides a gain as high as 30 dB, but using only 15m depressed cladding erbium-doped fiber (EDF) and 130 mW of 980 nm pump power. Compared to the single-pass configuration, this amplifier shows a gain enhancement of about 14 dB for pump powers above 120 mW. However, noise figures penalties of about 0.5~0.9 dB are obtained for these pump powers. The proposed double-pass amplifier will play an important role in the development of a practical S-band EDFA from perspective of economical usage of EDF and pump power. © 2005, The Institute of Electronics, Information and Communication Engineers. All rights reserved.