The effects of thermally-induced refractive index change on the guiding properties of different large mode area fibers have been numerically analyzed. A simple but accurate model has been applied to obtain the refractive index change in the fiber cross-section, and a full-vector modal solver based on the finite-element method has been used to calculate the guided modes of the fibers operating at high power levels. The results demonstrate that resonant structures added to the fiber cross-section can be exploited to provide efficient suppression of high-order modes with a good resilience to thermal effects.
Thermal effect-resilient design of large mode area double-cladding Yb-doped photonic crystal fibers / Coscelli, Enrico; Poli, Federica; Mette M., Jørgensen; Thomas T., Alkeskjold; Lasse, Leick; Jes, Broeng; Sozzi, Michele; Candiani, Alessandro; Cucinotta, Annamaria; Selleri, Stefano. - (2013), p. paper 8775-23. (Intervento presentato al convegno Photonic West 2013 - Fiber Lasers X: Technology, Systems, and Applications tenutosi a San Francisco, California, USA nel February 02, 2013) [10.1117/12.2004048].
Thermal effect-resilient design of large mode area double-cladding Yb-doped photonic crystal fibers
COSCELLI, Enrico;POLI, Federica;SOZZI, MICHELE;CANDIANI, Alessandro;CUCINOTTA, Annamaria;SELLERI, Stefano
2013-01-01
Abstract
The effects of thermally-induced refractive index change on the guiding properties of different large mode area fibers have been numerically analyzed. A simple but accurate model has been applied to obtain the refractive index change in the fiber cross-section, and a full-vector modal solver based on the finite-element method has been used to calculate the guided modes of the fibers operating at high power levels. The results demonstrate that resonant structures added to the fiber cross-section can be exploited to provide efficient suppression of high-order modes with a good resilience to thermal effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
