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Title: Concerning the Spatial Heterodyne Spectrometer

A modified Spatial Heterodyne Spectrometer (SHS) is used for measuring atomic emission spectra with high resolution. This device is basically a Fourier Transform Spectrometer, but the Fourier transform is taken in the directions perpendicular to the optical propagation and heterodyned around one preset wavelength. In recent descriptions of this device, one specific phenomenon - the tilt of the energy front of wave packets when diffracted from a grating - was neglected. This led to an overestimate of the resolving power of this spectrograph, especially in situations when the coherence length of the radiation under test is in the order of the effective aperture of the device. In conclusion, the limits of usability are shown here together with some measurements of known spectral lines.
Authors:
 [1] ;  [2]
  1. Lenzner Research LLC, Tucson, AZ (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
1242380
Grant/Contract Number:
SC0011446
Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 24; Journal Issue: 2; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Southwest Sciences, Inc., Santa Fe, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY spectrum analysis; spectrometers and spectroscopic instrumentation