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8 March 2014 Compact large-aperture Fabry-Perot interferometer modules for gas spectroscopy at mid-IR
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Proceedings Volume 8992, Photonic Instrumentation Engineering; 89920C (2014)
Event: SPIE OPTO, 2014, San Francisco, California, United States
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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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