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Robust, fast and se...
Robust, fast and sensitive near-infrared continuous-filtering Vernier spectrometer
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- Lu, Chuang (författare)
- Umeå universitet,Institutionen för fysik
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- Vieira, Francisco Senna (författare)
- Umeå universitet,Institutionen för fysik
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- Głuszek, Aleksander (författare)
- Laser & Fiber Electronics Group, Faculty of Electronics, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, Wrocław, Poland
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- Silander, Isak, 1980- (författare)
- Umeå universitet,Institutionen för fysik
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- Sobon, Grzegorz (författare)
- Laser & Fiber Electronics Group, Faculty of Electronics, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, Wrocław, Poland
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- Foltynowicz, Aleksandra, 1981- (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- The Optical Society, 2021
- 2021
- Engelska.
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Ingår i: Optics Express. - : The Optical Society. - 1094-4087. ; 29:19, s. 30155-30167
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- We present a new design of a robust cavity-enhanced frequency comb-based spectrometer operating under the continuous-filtering Vernier principle. The spectrometer is based on a compact femtosecond Er-doped fiber laser, a medium finesse cavity, a diffraction grating, a custom-made moving aperture, and two photodetectors. The new design removes the requirement for high-bandwidth active stabilization present in the previous implementations of the technique, and allows scan rates up to 100 Hz. We demonstrate the spectrometer performance over a wide spectral range by detecting CO2 around 1575 nm (1.7 THz bandwidth and 6 GHz resolution) and CH4 around 1650 nm (2.7 THz bandwidth and 13 GHz resolution). We achieve absorption sensitivity of 5 × 10−9 cm-1 Hz-1/2 at 1575 nm, and 1 × 10−7 cm-1 Hz-1/2 cm-1 at 1650 nm. We discuss the influence of the scanning speed above the adiabatic limit on the amplitude of the absorption signal.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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