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Updated: Sep 11, 2025

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Tunable spatial heterodyne spectroscopy with a linear relationship between fringe frequency and wavenumber
None:
This paper presents a tunable spatial heterodyne spectrometer in which the fringe frequency exhibits a strict linear relationship with the wavenumber of incident light. We describe its optical implementation method, precise spectral inversion expression, and performance parameters, with theoretical validity verified through a simulation-based design example. Compared with conventional spatial heterodyne spectroscopy, it offers the same usable field-of-view and spectral resolution, while increasing the spectral range and eliminating the need for nonlinear data processing.
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