Optical fabrication of organic nonlinear DAST crystals for high frequency modulation

Yoshiharu Namba; Sho Koyama; Hiromasa Ito; Young-Mok Son; Naoki Ohsaki

doi:10.1117/12.530031

19 November 2003 Optical fabrication of organic nonlinear DAST crystals for high frequency modulation

Yoshiharu Namba, Sho Koyama, Hiromasa Ito, Young-Mok Son, Naoki Ohsaki

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.530031
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

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.

Citation Download Citation

Yoshiharu Namba, Sho Koyama, Hiromasa Ito, Young-Mok Son, and Naoki Ohsaki "Optical fabrication of organic nonlinear DAST crystals for high frequency modulation", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.530031

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