Gain enhancement in partial double-pass L-band EDFA system using a band-pass filter

• Main Authors: Harun, Sulaiman Wadi, Samsuri, Norhakimah Md, Ahmad, Harith
• Format: Article
• Published: John Wiley & Sons 2005
• Subjects: Q Science (General); QC Physics; TA Engineering (General). Civil engineering (General); TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/19660/; http://dx.doi.org/10.1002/lapl.200410130

The partial double-pass L-band erbium-doped fiber amplifier with enhanced gain characteristic is demonstrated using a band pass filter (BPF). The BPF is incorporated to the doublepass route to suppress the amplified spontaneous emission from the single-pass output for gain enhancing. The gain of 515 dB is obtained for the proposed amplifier at input signal power of -40 dBm, which is approximately 5.2 dB higher compared with the system without the BPF. However, the insertion toss of the BPF contributes to a small noise figure penalty in the system. This amplifier can be easily modified to support dense wavelength division multiplexing system application by using multiple channel BPFs or interleaver.