Data processing pipeline for a time-sampled imaging Fourier transform spectrometer

Naylor, David; Fulton, T.; Davis, Peter W.; Chapman, Ian M.; Gom, Brad; Spencer, L. D.; Lindner, John V.; Nelson-Fitzpatrick, Nathan; Tahic, Margaret K.; Davis, G. R.

doi:10.1117/12.560096

Cited by 15 publications

(14 citation statements)

References 17 publications

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“…This will necessitate the use of a non-uniform FFT or an interpolation process in the processing pipeline. Algorithms to cope with this problem have already been developed for the SPIRE spectrometer 11 by members of our group.…”

Section: Observing Modesmentioning

confidence: 99%

Preliminary design of FTS-2: an imaging Fourier transform spectrometer for SCUBA-2

2006

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We present the preliminary design of FTS-2, an imaging Fourier transform spectrometer (IFTS) for use with SCUBA-2, the second generation, wide-field, submillimetre camera currently under development for the James Clerk Maxwell Telescope (JCMT). This system, which is planned for operation at the start of 2007, will provide simultaneous broadband spectral imaging across both the 850 and 450 µm bands with variable resolution ranging from resolving powers of R ~10 to 5000. The spectrometer uses a folded Mach-Zehnder configuration and novel intensity beam dividers. The mechanical and optical design of FTS-2 as of the Critical Design Review stage of the project are discussed, along with the interfaces with SCUBA-2 and the JCMT.

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Section: Observing Modesmentioning

confidence: 99%

Preliminary design of FTS-2: an imaging Fourier transform spectrometer for SCUBA-2

2006

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“…The detector signals are then interpolated onto the uniform OPD grid. For more on this interpolation step, see Naylor et al [109]. …”

Section: Spire Data-processing Pipelinementioning

confidence: 99%

“…Therefore, the first step in the processing re-samples the stage position onto a uniform OPD spacing by means of a cubic spline interpolation [109,143]. The detector signals are then interpolated onto the uniform OPD grid.…”

Section: Spire Data-processing Pipelinementioning

confidence: 99%

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SHIFTS: simulator for the Herschel imaging Fourier transform spectrometer

Lindner

Naylor

Swinyard

2006

Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter

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The Spectral and Photometric Imaging Receiver (SPIRE) is one of three scientific instruments on the European Space Agency's (ESAs) Herschel Space Observatory (HSO). The medium resolution spectroscopic capabilities of SPIRE are provided by an imaging Fourier transform spectrometer (IFTS). A software simulator of the SPIRE IFTS was written to generate realistic data products, making use of available qualification and test data. We present the design and implementation of the simulator. Component and end-to-end simulations were compared to results from the first

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“…Spectral inversion of an interferogram via the FFT requires the sampling locations to be evenly separated, i.e. each OPD must be an exact integer multiple of the first [16]. In regular operation, however, the OPDs will vary due to imperfections introduced during the fabrication process as well as fluctuations in chip temperature.…”

Section: Introductionmentioning

confidence: 99%

Athermal planar-waveguide Fourier-transform spectrometer for methane detection

Podmore¹,

Scott²,

Cheben³

et al. 2017

Opt. Express

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous. Abstract:We demonstrate a passively thermally-stabilized planar waveguide Fourier-transform spectrometer for remote detection of atmospheric methane. The device is implemented as a spatial heterodyne spectrometer using an array of 100 Mach-Zehnder interferometers (MZIs) on an integrated photonic chip. The spectrometer is buffered against temperature fluctuations by using waveguides with a carefully engineered, athermal geometry. The achieved waveguide thermooptic optic coefficient is 3.5 × 10 −6 K −1 . Effective entrance aperture is increased over dispersive element spectrometers, without sacrificing spectral resolution, by coupling light independently to each of the 100 MZIs. The output of each MZI is sampled in quadrature, to compensate for non-uniform illumination across the MZI input apertures. The spectrometer is validated using a methane reference cell in a benchtop setup: an interferogram is inverted via least-squares spectral analysis (LSSA) to retrieve multiple absorption lines at a spectral resolution of 50 pm over a 1 nm free spectral range (FSR) centered at λ 0 = 1666.5 nm. The retrieved spectrum is compared against the Beer-Lambert absorption law and is found to provide a correct measurement of the volume mixing ratio (VMR) in the optical path. 44(10), 761-765 (1954 Florjańczyk, and M. Vachon, "High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides," Opt. Lett., 38(5), 706-708 (2013). 13. M. Yang, M. Li, and J.-J. He, "Static FT imaging spectrometer based on a modified waveguide MZI array," Opt.

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Data processing pipeline for a time-sampled imaging Fourier transform spectrometer

Cited by 15 publications

References 17 publications

Preliminary design of FTS-2: an imaging Fourier transform spectrometer for SCUBA-2

Preliminary design of FTS-2: an imaging Fourier transform spectrometer for SCUBA-2

SHIFTS: simulator for the Herschel imaging Fourier transform spectrometer

Athermal planar-waveguide Fourier-transform spectrometer for methane detection

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