Investigation and characterization of highly efficient near-infrared scanning gratings used in near-infrared microspectrometers

Fabian Zimmer; Andreas Heberer; Heinrich Grueger; Harald Schenk

doi:10.1117/1.2911035

1 April 2008 Investigation and characterization of highly efficient near-infrared scanning gratings used in near-infrared microspectrometers

Fabian Zimmer, Andreas Heberer, Heinrich Grueger, Harald Schenk

Author Affiliations +

Journal of Micro/Nanolithography, MEMS, and MOEMS, Vol. 7, Issue 2, 021005 (April 2008). https://doi.org/10.1117/1.2911035

Abstract

We present investigations of a new miniaturized NIR spectrometerwith a size of only 10×8×8 cm³, and a MOEMS-scanninggrating chip as a main element. It works currently in a spectral range of 1200 to 1900 nm with a resolution of less than 10 nm using only one single InGaAs diode as a detector. One entire spectral measurement is done within 6 msec, calculated by a digital signal processor, which is included in the spectrometer. The MOEMS-scanning-grating chip is resonantly driven by a pulsed voltage of up to 36 V, has a grating plate 3×3 mm², and reaches deflection angles of ±8 deg at 25 V. Control and investigation of the deflection angle, the static deformation, the spectralefficiency, and the mechanical shock resistance are key parameters toreach the spectrometer specifications. Results of these measurementsand their influence on the spectrometer are discussed. Special etch control structures to monitor the fabrication process of the grating structure in the nanometer range, which can be easily done by microscopic inspection, are also presented.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Fabian Zimmer, Andreas Heberer, Heinrich Grueger, and Harald Schenk "Investigation and characterization of highly efficient near-infrared scanning gratings used in near-infrared microspectrometers," Journal of Micro/Nanolithography, MEMS, and MOEMS 7(2), 021005 (1 April 2008). https://doi.org/10.1117/1.2911035

Published: 1 April 2008

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