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Nikodem, Michał; Krzempek, Karol; Dudzik, Grzegorz; Abramski, Krzysztof
Optics express, 2018-Aug-20, 2018-08-20, 20180820, Letnik: 26, Številka: 17Journal Article
A laser-based spectrometer exploiting a novel Kagome-type hollow core photonic crystal fiber, which serves as a gas cell is demonstrated. Low attenuation of this silica-based fiber in the 3.4 µm wavelength region enables accessing strong, fundamental transitions of methane, which was used as a target analyte in the presented experiment. With an all-fiber differential frequency generation source combined with wavelength modulation spectroscopy technique detection limit at single parts-per-million by volume level was obtained. These results show potential for developing compact and sensitive Kagome-fiber-based mid-infrared laser spectrometers.
