Open AccessGain dynamics in Er^3+:Yb^3+ co-doped fiber amplifiers
Author(s) -
M. Steinke,
Jörg Neumann,
Dietmar Kracht,
P. Weßels
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.014946
Subject(s) - amplifier , optics , materials science , fiber amplifier , optical amplifier , amplified spontaneous emission , fiber , transfer function , optoelectronics , physics , laser , cmos , electrical engineering , composite material , engineering
Understanding the gain dynamics of fiber amplifiers is essential for the implementation and active stabilization of low noise amplifiers or for coherent beam combining schemes. The gain dynamics of purely Er 3+ or Yb 3+ doped fiber amplifiers are well studied, whereas no analysis for co-doped systems, especially for Er 3+ :Yb 3+ co-doped fiber amplifiers has been performed, so far. Here, we analyze for the first time the gain dynamics of Er 3+ :Yb 3+ co-doped fiber amplifiers theoretically and experimentally. It is shown that due to the energy transfer between the Yb 3+ and Er 3+ ions a full analytical solution is not possible. Thus, we used numerical simulations to gain further insights. Comparison of experimental and numerical results shows good qualitative agreement. In addition, we were able to determine the Yb 3+ -Er 3+ transfer function of the energy transfer experimentally.