Abstract

The Yb concentration of double-clad optical fiber amplifiers is numerically optimized with respect to maximizing the transverse modal instability threshold in the presence of absorption arising from photodarkening. The pump cladding area is scaled with the Yb concentration to approximately maintain the pump absorption in operation. It is found that approximate analytical expressions can predict the optimized concentration levels found in numerical simulations with sufficient accuracy to be useful in fiber design.

© 2016 Optical Society of America

Optimizing high-power Yb-doped fiber amplifier systems in the presence of transverse mode instabilities

Cesar Jauregui, Hans-Jürgen Otto, Sven Breitkopf, J. Limpert, and A. Tünnermann
Opt. Express 24(8) 7879-7892 (2016)

Simplified modelling the mode instability threshold of high power fiber amplifiers in the presence of photodarkening

Cesar Jauregui, Hans-Jürgen Otto, F. Stutzki, J. Limpert, and A. Tünnermann
Opt. Express 23(16) 20203-20218 (2015)

Tradeoff between the Brillouin and transverse mode instabilities in Yb-doped fiber amplifiers

J. T. Young, A. J. Goers, D. M. Brown, M. L. Dennis, K. Lehr, C. Wei, C. R. Menyuk, and J. Hu
Opt. Express 30(22) 40691-40703 (2022)

Estimating modal instability threshold for photonic crystal rod fiber amplifiers

Mette Marie Johansen, Kristian Rymann Hansen, Marko Laurila, Thomas Tanggaard Alkeskjold, and Jesper Lægsgaard
Opt. Express 21(13) 15409-15417 (2013)

Static thermo-optic instability in double-pass fiber amplifiers

Jesper Lægsgaard
Opt. Express 24(12) 13429-13443 (2016)