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Proceedings Paper

Optical fabrication of organic nonlinear DAST crystals for high frequency modulation
Author(s): Yoshiharu Namba; Sho Koyama; Hiromasa Ito; Young-Mok Son; Naoki Ohsaki
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Paper Abstract

Organic nonlinear crystal 4-dimethylamino-N-metyl-4-stilbazolium tosylate (DAST) was machined ino the surface roughness of 0.76 nm rms for a high frequency modulator by an ultra-precision diamond turning lathe under special machining conditions, though the crystal is unable to be polished into an optical surface because of its softness, brittleness and hygroscopicity. The quality of machined surface was proved by the optical modulation response from 10 MHz to 20 GHz after making EO modulators.

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: 10.1117/12.530031
Show Author Affiliations
Yoshiharu Namba, Chubu Univ. (Japan)
Sho Koyama, Chubu Univ. (Japan)
Hiromasa Ito, Tohoku Univ. (Japan)
Young-Mok Son, Tohoku Univ. (Japan)
Naoki Ohsaki, Tohoku Univ. (Japan)


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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