Single-detector micro-electro-mechanical scanning grating spectrometer |
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Authors: | M. Kraft A. Kenda A. Frank W. Scherf A. Heberer T. Sandner H. Schenk F. Zimmer |
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Affiliation: | (1) CTR Carinthian Tech Research AG, Europastr. 4, 9524 Villach/St. Magdalen, Austria;(2) Fraunhofer Institute of Photonic Microsystems (IPMS), Maria-Reiche-Str. 2, 01109 Dresden, Germany |
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Abstract: | A compact, robust grating spectrometer based on an optimised micro-electro-mechanical grating mirror component has been developed, built, and characterised. The application of an oscillating reflection grating micro-mirror component as scanning dispersive element in a modified Czerny–Turner monochromator layout enables the design of compact grating spectrometers capable of acquiring full spectra using a single detector element. Designed for a wavelength range between 1200 and 1900 nm, the spectrometer features a spectral resolution of 10 nm with wavelength stability better than ±0.5 nm. One-hundred scan spectra can be acquired in less than one second, or spectral changes can be monitored at time a resolution of less than 10 ms. In combination with a fibre-optic interface and a typical weight of less than 1 kg, this makes this novel type of fully portable micro-electro-mechanical near-IR scanning spectrometer an interesting alternative to existing spectrometers and opens a range of new applications, in particular the detection of major and minor components in the near-IR. MEMS SG spectrometer prototype |
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Keywords: | Spectroscopy instrumentation Miniaturised grating spectrometer MEMS Near-infrared Rapid scanning |
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