In this paper, we theoretically and experimentally investigated a two-stage erbium-doped fiber amplifier (EDFA) with a single-pump laser diode pumped at 980 nm in which a Sagnac interferometer filter is introduced to reduce amplified spontaneous emission (ASE) providing significant improvement on the amplifier performance. The erbium-doped fiber (EDF) parameters were measured in order to optimize parameters such as pump power, EDF length, ASE noise and signal gain. The Sagnac interferometer filter was designed to provide a periodic transmittance of 46 nm that allows by temperature to adjust the minimum transmission at 1530 nm (peak of the ASE noise) and maximum transmission at 1550 nm (signal wavelength). Experimental results show that with a simple configuration we obtained up to 53-dB amplification with only 75 mW of pump power, which can be enhanced easily by 3 dB providing total amplification up to more than 55 dB.

Date Published: 23 February 2007
PDF: 9 pages
Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 645322 (23 February 2007);

Published in SPIE Proceedings Vol. 6453:
Fiber Lasers IV: Technology, Systems, and Applications
Donald J. Harter; Andreas Tünnermann; Jes Broeng; Clifford Headley III, Editor(s)