Gain equalization of EDFA using a loop filter with a single polarization controller
Ngo, Nam Quoc
Date of Issue2012
School of Electrical and Electronic Engineering
A Sagnac loop filter with two pieces of high birefringence fiber having equal lengths, and spliced together at a fixed angle of 30o displacement between the two principle axes, is proposed in this letter. Gain equalization of erbium-doped fiber amplifiers (EDFAs) is implemented by tuning only the polarization controller in the loop filter. Experimental result shows that there remains a deviation of \pm 1 dB in the region of the flattened profile with the useful bandwidth of about 23 nm, thereby demonstrating the effectiveness of the method. An effective mathematical model and mechanism is also given for further explanation.
DRNTU::Engineering::Electrical and electronic engineering
Chinese optics letters
© 2012 Chinese Optics Letters. This paper was published in Chinese Optics Letters and is made available as an electronic reprint (preprint) with permission of Chinese Optics Letters. The paper can be found at the following official DOI: [http://dx.doi.org/10.3788/COL201210.070604]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.