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Applied Spectroscopy

Applied Spectroscopy


  • Vol. 52, Iss. 7 — Jul. 1, 1998
  • pp: 1008–1013

Proposal for High-Resolution, Wide-Bandwidth, High-Optical-Throughput Spectroscopic System Using a Fabry-Perot Interferometer

Tetsuo Iwata and Jun Koshoubu

Applied Spectroscopy, Vol. 52, Issue 7, pp. 1008-1013 (1998)

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We propose a high-resolution, wide-bandwidth, high-opticalthroughput spectroscopic system, in which a Fabry-Perot interferometer (FPI) is used in tandem with a second spectrometer. As the second spectrometer, one of the following three instruments can be used: (1) a grating dispersion-type monochromator attached to a multichannel detector (MCD), (2) a conventional Fourier transform spectrometer (FTS), or (3) a multichannel FTS (MFTS). The principle of operation for the three systems is the same. First, we adjust the free spectral range (FSR) of the FPI to be k (>1) times the data interval DI (or resolved wavenumber) of the second spectrometer. The FSR is divided by N (>k) equally, and the etalon plate spacing of the FPI is changed N times with a step interval of FSR / N in wavenumber. Thereby we gather a total of N spectra from the second spectrometer. Finally, a single high-resolution spectrum is synthesized from the N spectra. To demonstrate the real capabilities of the proposed systems, we present computer simulation results.

Tetsuo Iwata and Jun Koshoubu, "Proposal for High-Resolution, Wide-Bandwidth, High-Optical-Throughput Spectroscopic System Using a Fabry-Perot Interferometer," Appl. Spectrosc. 52, 1008-1013 (1998)

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