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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 36, Iss. 24 — Dec. 15, 2011
  • pp: 4803–4805

Spectral resolution enhancement without increasing the number of grooves in grating-based spectrometers

Eun Seong Lee  »View Author Affiliations

Optics Letters, Vol. 36, Issue 24, pp. 4803-4805 (2011)

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A simple scheme of an optical setup to enhance the spectral resolution of diffraction gratings without increasing the number of grooves is presented. A plane-parallel mirror pair, which consists of a 100% reflectivity mirror and a 50% reflectivity mirror, is placed upon a grating. For certain values of the mirror gap and the angle between the grating and the mirrors, the effective size of the grating doubles, as does the resolution. Using a grating of 830grooves/mm and a narrow-band diode laser that is tunable around 773 nm, we experimentally demonstrated an enhancement of the resolution by a factor of 2.

© 2011 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(300.3700) Spectroscopy : Linewidth
(300.6190) Spectroscopy : Spectrometers

ToC Category:

Original Manuscript: September 22, 2011
Revised Manuscript: October 26, 2011
Manuscript Accepted: November 7, 2011
Published: December 15, 2011

Eun Seong Lee, "Spectral resolution enhancement without increasing the number of grooves in grating-based spectrometers," Opt. Lett. 36, 4803-4805 (2011)

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