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Proceedings Paper

Purification of organic nonlinear optical materials for bulk crystal growth from melt
Author(s): Tesfaye Gebre; Kamala N. Bhat; Ashok K. Batra; Ravindra B. Lal; Mohan D. Aggarwal; Benjamin G. Penn; Donald O. Frazier
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Paper Abstract

The techniques developed for purification of nonlinear optical organic materials, such as benzil, 2-methyl-4-nitroaniline (MNA), Dicyanovinyl anisole (DIVA) and its derivatives, nitrophenyl prolinol (NPP) and other Schiff's base compounds, include Kugelrohy method, physical vapor transport, zone refining and recrystallization from the solvent are described. Purity of the materials is tested using differential thermal analysis, gas chromatograph/Mass detector, Fourier Transform Infrared spectroscopy and melting point measurements. The purified materials were later used in the growth of single crystal by Bridgman-Stockbarger and Czochralski techniques.

Paper Details

Date Published: 25 October 2002
PDF: 7 pages
Proc. SPIE 4813, Crystal Materials for Nonlinear Optical Devices and Microgravity Science, (25 October 2002); doi: 10.1117/12.452411
Show Author Affiliations
Tesfaye Gebre, Alabama A&M Univ. (United States)
Kamala N. Bhat, Alabama A&M Univ. (United States)
Ashok K. Batra, Alabama A&M Univ. (United States)
Ravindra B. Lal, Alabama A&M Univ. (United States)
Mohan D. Aggarwal, Alabama A&M Univ. (United States)
Benjamin G. Penn, NASA Marshall Space Flight Ctr. (United States)
Donald O. Frazier, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 4813:
Crystal Materials for Nonlinear Optical Devices and Microgravity Science
Ravindra B. Lal; Donald O. Frazier; Narayanan Ramachandran, Editor(s)

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