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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 67, Iss. 8 — Aug. 1, 2013
  • pp: 873–883

High-Throughput, High-Resolution Echelle Deep-UV Raman Spectrometer

Sergei V. Bykov, Bhavya Sharma, and Sanford A. Asher

Applied Spectroscopy, Vol. 67, Issue 8, pp. 873-883 (2013)


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Abstract

We constructed an ultrahigh-throughput, high-resolution ultraviolet (UV) Raman spectrograph that utilizes a high-efficiency filter-stage monochromator and a high-dispersion Echelle spectrograph. The spectrograph utilizes a total of six mirrors and two gratings, with an overall efficiency at 229 nm of ?18%. The limiting resolution of our spectrometer is 0.6 cm?1 full width half-maximum (FWHM), as measured for 229 nm Rayleigh scattering. Use of a 1 mm-wide entrance slit gives rise to an approximately 10 cm?1 FWHM resolution at 229 nm. The ultrahigh spectrograph throughput enables ultrahigh signal-to-noise ratio, deep UV Raman spectra that allow us to monitor <1% changes in peptide bond composition. The throughput is measured to be 35-fold greater than conventional deep UV Raman spectrometers.

Citation
Sergei V. Bykov, Bhavya Sharma, and Sanford A. Asher, "High-Throughput, High-Resolution Echelle Deep-UV Raman Spectrometer," Appl. Spectrosc. 67, 873-883 (2013)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-67-8-873

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