A Sagnac Fourier spectrometer
Abstract
A spectrometer based on a Sagnac interferometer, where one of the mirrors is replaced by a transmission grating, is introduced. Since the action of a transmission grating is reversible, both directions experience the same diffraction at a given wavelength. At the output, the crossed wavefronts are imaged onto a camera, where their Fizeau fringe pattern is recorded. Each spectral element produces a unique spatial frequency, hence the Fourier transform of the recorded interferogram contains the spectrum. Since the grating is tuned to place zero spatial frequency at a selected wavelength, the adjoining spectrum is heterodyned with respect to this wavelength. This spectrum can then be discriminated at a high spectral resolution from relatively low spatial frequencies. The spectrometer can be designed without moving parts for a relatively narrow spectral range or with a rotatable grating. As a result, the latter version bears the potential to be calibrated without a calibrated light source.
- Authors:
-
- Lenzner Research LLC, Tucson, AZ (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Univ. of New Mexico, Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1351625
- Grant/Contract Number:
- SC0011446
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Optics Express
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 8; Journal ID: ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; Fourier transform spectroscopy; heterodyne; spectroscopy
Citation Formats
Lenzner, Matthias, and Diels, Jean -Claude. A Sagnac Fourier spectrometer. United States: N. p., 2017.
Web. doi:10.1364/OE.25.00A447.
Lenzner, Matthias, & Diels, Jean -Claude. A Sagnac Fourier spectrometer. United States. https://doi.org/10.1364/OE.25.00A447
Lenzner, Matthias, and Diels, Jean -Claude. Thu .
"A Sagnac Fourier spectrometer". United States. https://doi.org/10.1364/OE.25.00A447. https://www.osti.gov/servlets/purl/1351625.
@article{osti_1351625,
title = {A Sagnac Fourier spectrometer},
author = {Lenzner, Matthias and Diels, Jean -Claude},
abstractNote = {A spectrometer based on a Sagnac interferometer, where one of the mirrors is replaced by a transmission grating, is introduced. Since the action of a transmission grating is reversible, both directions experience the same diffraction at a given wavelength. At the output, the crossed wavefronts are imaged onto a camera, where their Fizeau fringe pattern is recorded. Each spectral element produces a unique spatial frequency, hence the Fourier transform of the recorded interferogram contains the spectrum. Since the grating is tuned to place zero spatial frequency at a selected wavelength, the adjoining spectrum is heterodyned with respect to this wavelength. This spectrum can then be discriminated at a high spectral resolution from relatively low spatial frequencies. The spectrometer can be designed without moving parts for a relatively narrow spectral range or with a rotatable grating. As a result, the latter version bears the potential to be calibrated without a calibrated light source.},
doi = {10.1364/OE.25.00A447},
journal = {Optics Express},
number = 8,
volume = 25,
place = {United States},
year = {2017},
month = {3}
}
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