Effects of an auxiliary pump on the performance of TDFA

• Main Authors: Emami, Siamak Dawazdah, Harun, Sulaiman Wadi, Rahman, Faidz Abd, Abdul-Rashid, Hairul Azhar, Ahmad, Harith
• Format: Article
• Published: IOP Publishing 2008
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/19743/; https://doi.org/10.1134/S1054660X08080112

An efficient fluoride-based thulium-doped fiber amplifier (TDFA) is theoretically demonstrated using a dual pumping scheme. Differential equations are solved directly in the theoretical analysis. An auxiliary pump at 1560 nm is used for ground-state absorption to enhance the excited-state absorption provided by the main pump of 1050 nm and, thus, to improve the gain and noise figure of the TDFA. A gain improvement of more than 10 dB is obtained at the 1470-nm region with the use of a 1560-nm pump at 20 mW. A small signal gain as high as 30 dB is obtained at this region with 100 mW of a 1050-nm pump and 20 mW of a 1560-nm pump using a 20-m of thulium-doped fiber. The corresponding noise figure is obtained at lower than 5 dB.