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Comparison of Raman Spectrograph Throughput Using Two Commercial Systems: Transmissive Versus Reflective

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Abstract:

A common goal of most Raman spectroscopists is the acquisition of clear Raman spectra in short integration times. It is paramount, then, that the hardware used in a Raman system be optimized for throughput, signal-to-noise ratio, and resolution. To this end, we performed a systematic comparison of two Raman spectrographs: the widely used Kaiser HoloSpec and a relatively new commercial offering, the Raman Explorer by Headwall Photonics. Both strong and weak Raman scattering samples were measured using various launching conditions. When resolution-matched, the throughputs of both spectrographs were found to be roughly similar over the central range of the fingerprint region (approximately 800 to 1140 cm−1, using 785 nm illumination), with the Raman Explorer demonstrating a slight throughput advantage outside this range. Other factors are also considered such that end users may better select the optimum spectrograph for their particular application.

Keywords: INSTRUMENTATION; RAMAN SPECTROSCOPY; SPECTROGRAPH; SYSTEM COMPARISON

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370208784344488

Affiliations: 1: CHOC Research Institute, Children's Hospital of Orange County, Orange, California 92868 2: Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37235

Publication date: May 1, 2008

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