Scientific Results

Full characterization of the photorefractive bright soliton formation process using a digital holographic technique

Year: 2009

Authors: Merola F., Miccio L., Paturzo M., De Nicola S., Ferraro P.

Autors Affiliation: CNR _ Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Universit√† degli Studi di Napoli “Federico II”, Dipartimento di Scienze Fisiche, Via Cintia, 80126 Napoli, Italy;
CNR – Istituto di Cibernetica “E. Caianiello” Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy

Abstract: An extensive characterization of the photorefractive bright soliton writing process in a lithium niobate crystal is presented. An interferometric approach based on a digital holographic technique has been used to reconstruct the complex wave field at the exit face of the crystal. Temporal evolution of both intensity and phase profile of the writing beam has been analysed. The effective changes of the refractive index of the medium during the writing process and after the soliton formation are determined from the optical phase distribution. This method provides a reliable way to observe the process of soliton formation, whereas the determination of the intensity distribution of the output beam does not show clearly whether the soliton regime has been achieved or not. Furthermore, a detailed analysis of the soliton in a steady-state situation and with different writing conditions is presented and discussed.


Volume: 20 (4)      Pages from: 045301-1  to: 045301-10

KeyWords: lithium niobate; digital holography; photorefractive solitons

Citations: 3
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