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New design and calibration method for a tunable single-grating spatial heterodyne spectrometer
Author(s) -
Gergely Németh,
Áron Pekker
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.395569
Subject(s) - optics , heterodyne (poetry) , spectrometer , grating , calibration , broadband , wavelength , spatial frequency , computer science , physics , acoustics , quantum mechanics
In our paper, we present a new design for a single-grating tunable spatial heterodyne spectrometer (SHS). Our design simplifies the change of the center wavelength (Littrow wavelength) thus one can quickly tune the system to an arbitrary spectral range. Furthermore, we introduce a new calibration method that provides superior calibration accuracy over the generally used formulas involving small angle approximations. We also present considerations about the general usability of the SHS technique in broadband measurements and propose different strategies to improve the signal-to-noise ratio.

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