Compact large-aperture Fabry-Perot interferometer modules for gas spectroscopy at mid-IR

Uula Kantojärvi; Aapo Varpula; Tapani Antila; Christer Holmlund; Jussi Mäkynen; Antti Näsilä; Rami Mannila; Anna Rissanen; Jarkko Antila; Rolf J. Disch; Torsten A. Waldmann

doi:10.1117/12.2036336

8 March 2014 Compact large-aperture Fabry-Perot interferometer modules for gas spectroscopy at mid-IR

Uula Kantojärvi, Aapo Varpula, Tapani Antila, Christer Holmlund, Jussi Mäkynen, Antti Näsilä, Rami Mannila, Anna Rissanen, Jarkko Antila, Rolf J. Disch, Torsten A. Waldmann

Author Affiliations +

Proceedings Volume 8992, Photonic Instrumentation Engineering; 89920C (2014) https://doi.org/10.1117/12.2036336
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

VTT has developed Fabry-Pérot Interferometers (FPI) for visible and infrared wavelengths since 90’s. Here we present two new platforms for mid-infrared gas spectroscopy having a large optical aperture to provide high optical throughput but still enabling miniaturized instrument size. First platform is a tunable filter that replaces a traditional filter wheel, which operates between wavelengths of 4-5 um. Second platform is for correlation spectroscopy where the interferometer provides a comb-like transmission pattern mimicking absorption of diatomic molecules at the wavelength range of 4.7-4.8 um. The Bragg mirrors have 2-4 thin layers of polysilicon and silicon oxide.

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Uula Kantojärvi, Aapo Varpula, Tapani Antila, Christer Holmlund, Jussi Mäkynen, Antti Näsilä, Rami Mannila, Anna Rissanen, Jarkko Antila, Rolf J. Disch, and Torsten A. Waldmann "Compact large-aperture Fabry-Perot interferometer modules for gas spectroscopy at mid-IR", Proc. SPIE 8992, Photonic Instrumentation Engineering, 89920C (8 March 2014); https://doi.org/10.1117/12.2036336

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