We propose a new model for gain competition effects in high-power fiber amplifiers, which accounts for the thermal effects of heat load on the doped core overlap of the propagating light field. The full-vectorial nature of the fiber modes is modeled by an embedded finite-element method modal solver, and the temperature profile is calculated by a simple and efficient radial heat propagation solver. The model is applied to a Yb3+-doped LPF45 air-clad photonic-crystal fiber amplifier for coand counter-propagating pumping setups, showing gain competition in conditions of severe heat load.
Thermal modeling of gain competition in Yb-doped large-mode-area photonic-crystal fiber amplifier / Rosa, Lorenzo; Coscelli, Enrico; Poli, Federica; Cucinotta, Annamaria; Selleri, Stefano. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 23:(2015), pp. 18638-18644. [10.1364/OE.23.018638]
Thermal modeling of gain competition in Yb-doped large-mode-area photonic-crystal fiber amplifier
COSCELLI, Enrico;POLI, Federica;CUCINOTTA, Annamaria;SELLERI, Stefano
2015-01-01
Abstract
We propose a new model for gain competition effects in high-power fiber amplifiers, which accounts for the thermal effects of heat load on the doped core overlap of the propagating light field. The full-vectorial nature of the fiber modes is modeled by an embedded finite-element method modal solver, and the temperature profile is calculated by a simple and efficient radial heat propagation solver. The model is applied to a Yb3+-doped LPF45 air-clad photonic-crystal fiber amplifier for coand counter-propagating pumping setups, showing gain competition in conditions of severe heat load.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
