Integrable thin-film Fabry-Pérot type electro-optic modulator

Anna K. Rüsseler; Philipp Gehrke; Florens Kurth; Li Zhao; Sophie-Luise Hachmeister; Jonas N. Matthes; Gerd-Albert Hoffmann; Marco Jupé; Hans-Hermann Johannes; Wolfgang Kowalsky; Tasja Schwenke; Henning Menzel; Andreas Wienke; Detlev Ristau

doi:10.1117/12.3016155

18 June 2024 Integrable thin-film Fabry-Pérot type electro-optic modulator

Anna K. Rüsseler, Philipp Gehrke, Florens Kurth, Li Zhao, Sophie-Luise Hachmeister, Jonas N. Matthes, Gerd-Albert Hoffmann, Marco Jupé, Hans-Hermann Johannes, Wolfgang Kowalsky, Tasja Schwenke, Henning Menzel, Andreas Wienke, Detlev Ristau

Author Affiliations +

Proceedings Volume 13020, Advances in Optical Thin Films VIII; 130200E (2024) https://doi.org/10.1117/12.3016155
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

We report on an integrable thin-film Fabry-Pérot type electro-optic modulator (EOM) centered around an electro-optically active so-called guest-host polymer. This polymer material contains novel synthesized chromophore molecules (C3), which are aligned by electro-poling inside an amorphous polycarbonate host-matrix. When integrated into our Fabry-Pérot cavity, the electro-optic activity of the poled material can be observed in the short wavelength near infrared spectral range (approximately 900 nm - 1070 nm). We derived a value of ~220 pm/V for its linear electro-optic coefficient at 988 nm from spectral transmission measurements with increasing direct voltages applied to the EOM. The resulting half-wave voltage-length product of the EOM setup is 0.25 Vcm. As an exemplary functional test, we demonstrated an intensity modulation of a 974 nm diode laser by applying ± 11.5 V alternating voltage to the EOM. Due to the all thin-film realization of the EOM setup, it is compatible to the substrate free, miniaturized interference filter fabrication method. With this method, thin-film elements with edge lengths between 25 μm and 2 mm can be fabricated. In combination with the demonstrated low drive voltage, these compact EOM filters are excellent candidates for hybrid integration into photonic platforms, as shown in this contribution.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Anna K. Rüsseler, Philipp Gehrke, Florens Kurth, Li Zhao, Sophie-Luise Hachmeister, Jonas N. Matthes, Gerd-Albert Hoffmann, Marco Jupé, Hans-Hermann Johannes, Wolfgang Kowalsky, Tasja Schwenke, Henning Menzel, Andreas Wienke, and Detlev Ristau "Integrable thin-film Fabry-Pérot type electro-optic modulator", Proc. SPIE 13020, Advances in Optical Thin Films VIII, 130200E (18 June 2024); https://doi.org/10.1117/12.3016155

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KEYWORDS

Electrooptic modulation

Electrooptic modulators

Thin films

Electro optics

Polymers

Miniaturization

Mirrors

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