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Proceedings Paper

Interferometric analysis of self-phase-modulation at 10.6μm in a nematic liquid crystal
Author(s): Enrico Allaria; Stefano Brugioni; Sergio M. De Nicola; Pietro Ferraro; Simonetta Grilli; Riccardo Meucci; Giovanni Pierattini
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Paper Abstract

We describe an interferometric technique based on high precision two-dimensional spatial fringe analysis Fourier method. Such a method is used to investigate the characteristic ring diffraction pattern generated by the self-phase-modulation (SPM) effect induced in nematic liquid crystals (NLC) by an infrared laser beam. The experimental set-up employs a Mach-Zehnder interferometer with a c.w. CO2 laser emitting at 10.6 μm and a pyroelectric optoelectronic sensor array to detect the modulated ring pattern intensity distribution formed in the far field by a nematic E-7 sample. And accurate determination of the nonlinear refractive index can be obtained by analyzing the two-dimensional phase distribution of the ring pattern. (Summary only available)

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.530779
Show Author Affiliations
Enrico Allaria, Istituto Nazionale di Ottica Applicata (Italy)
Stefano Brugioni, Istituto Nazionale di Ottica Applicata (Italy)
Sergio M. De Nicola, Istituto di Cibernetica (Italy)
Pietro Ferraro, Istituto per la Microelettronica e Microsistemi (Italy)
Simonetta Grilli, Istituto Nazionale di Ottica Applicata (Italy)
Riccardo Meucci, Istituto Nazionale di Ottica Applicata (Italy)
Giovanni Pierattini, Istituto di Cibernetica (Italy)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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