Thermal poling of optical fibres is a well-known technique to create second order nonlinearity inside silica optical fibres, otherwise characterized by negligible nonlinear properties in the electric dipole approximation. Some recent work, realized by F. De Lucia et al., has introduced a new technique, designated as “Induction poling” [1] and with the adoption of liquid materials as embedded electrodes (both metallic and non-metallic) [2], allows thermal poling of optical fibres with any length and geometry. Despite these advances, thermal poling still represents a technological challenge that needs to be continuously optimized and simplified. In this work we focus our attention on the optimization of the electrical configuration of thermal poling of single mode optical fibres. We consider the single-anode (S-A) configuration, where a single electrode is embedded inside one of the two cladding channels of the optical fibre and connected to the desired electrical potential, and the double-anode (D-A) configuration, introduced for the first time by W. Margulis et al. in 2009 [3] and later commonly adopted by the scientific community. Fig.

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