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22 May 2023 Free-standing thin-film waveguide for PIC-based mid-IR trace gas sensing (Conference Presentation)
Jehona Salaj, Marek Vlk, Jens Høvik, Astrid Aksnes, Jana Jágerská
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Proceedings Volume 12327, SPIE Future Sensing Technologies 2023; 123270S (2023) https://doi.org/10.1117/12.2645124
Event: SPIE Future Sensing Technologies, 2023, Yokohama, Japan
Abstract
Mid-infrared tuneable diode laser absorption spectroscopy (TDLAS) realized with photonic integrated circuits (PICs) has the potential to create small and portable sensing devices with exceptional sensitivity. Here we present a photonic crystal (PhC) W5 waveguide-based sensor, which provides stronger interaction between the light and the analyte than a free space beam, as well as low scattering and material absorption losses. We demonstrate its performance by analysing the transmission spectra of two CO2 isotopes at 4345 nm.
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Jehona Salaj, Marek Vlk, Jens Høvik, Astrid Aksnes, and Jana Jágerská "Free-standing thin-film waveguide for PIC-based mid-IR trace gas sensing (Conference Presentation)", Proc. SPIE 12327, SPIE Future Sensing Technologies 2023, 123270S (22 May 2023); https://doi.org/10.1117/12.2645124
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KEYWORDS
Waveguides
Thin films
Mid-IR
Photonic integrated circuits
Reactive ion etching
Scattering
Sensors
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