High-gain erbium-doped fiber amplifier incorporating a double-pass amplification technique as a preamplifier

• Main Authors: Bouzid, Belloui, Abdullah, Mohamad Khazani, Mahdi, Mohd Adzir
• Format: Article
• Language: English; English
• Published: Springer Verlag 2008
• Online Access: http://psasir.upm.edu.my/id/eprint/8216/1/High2.pdf; http://psasir.upm.edu.my/id/eprint/8216/; http://dx.doi.org/10.1134/s11490-008-4020-4
• Institution: Universiti Putra Malaysia

We present a high-gain erbium-doped fiber amplifier to be utilized as a preamplifier. A double-pass amplification technique is used in the first-stage amplifier together with a tunable bandpass filter. The secondstage amplifier is a counter-pumped configuration and another tunable bandpass filter is utilized to filter out amplified spontaneous emission from the first-stage amplifier. This design is able to produce a high gain of 55.6 dB and a noise figure of 6.02 dB at 1530 nm with a signal power of −45 dBm. The receiver sensitivity measurement shows that the proposed amplifier improves the minimum detectable power from −33.7 to −40.8 dBm for a bit-error rate of 10−11 at 155 Mbps.