We have developed a coupled mode analysis for an erbium-doped coaxial fiber (EDCF) with doping only in the inner rod. With this analysis, the gain characteristics of the EDCF can be obtained in terms of the gain characteristics of a conventional single-core erbium-doped fiber. We have illustrated the use of this method in studying an EDCF and shown its application for inherent gain flattening.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: January 3, 2013
Manuscript Accepted: March 26, 2013
Published: May 9, 2013
Jyoti Anand, Jagneet Kaur Anand, and Enakshi K. Sharma, "Coupled mode analysis for simplified gain calculations in erbium-doped coaxial fibers," J. Opt. Soc. Am. B 30, 1496-1502 (2013)