Share Email Print

Optical Engineering

Few-mode erbium-doped fiber amplifier design method based on the signal-pump overlap integral
Author(s): Adolfo F. Herbster; Murilo A. Romero
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

Space-division multiplexing allows an increase of link capacity by using either multicore or single-core few-mode (FM) optical fibers. In the case of FM systems, each mode carries its own data stream and long-haul transmission can be hampered by the use of conventional erbium-doped fiber amplifiers (EDFAs), since because of distinct field profile configurations, each mode experiences a different value of optical gain. The role of the FM-EDFA designer, usually done by solving rate and propagation equations, is to define both the fiber cross-section and the pumping configuration to provide the best possible mode equalization of optical gain and noise figure. An optimization method is proposed here based on the definition of a figure of merit related to the equalization of the pump-mode signal overlap integral, significantly reducing computation time and allowing a multiobjective optimization approach. The results obtained were validated against the solution provided by the full set of rate and propagation equations and we conducted an FM-EDFA optimization case study. Our double-ring Er doping profile design requires a single 180-mW LP11 pump to provide a mean gain of 21.3 dB, within 0.6 dB of equalization for each of the four modes considered.

Paper Details

Date Published: 2 September 2014
PDF: 10 pages
Opt. Eng. 53(9) 096101 doi: 10.1117/1.OE.53.9.096101
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Adolfo F. Herbster, Univ. de São Paulo (Brazil)
Murilo A. Romero, Univ. de São Paulo (Brazil)

© SPIE. Terms of Use
Back to Top