# AUTOMATED WAVENUMBER DETERMINATION FOR DIODE LASER SPECTRA

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/13256

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 Title: AUTOMATED WAVENUMBER DETERMINATION FOR DIODE LASER SPECTRA Creators: Xu, Li-Hong; Lees, R. M.; Moruzzi, Giovanni Issue Date: 1994 Publisher: Ohio State University Abstract: An accurate and convenient two-channel wavenumber calibration program has developed for a Laser Photonics diode laser system. The method is based solely on comparison of sample and reference spectra, as recorded and stored by the standard sweep control and data acquisition facilities supplied with the system. The calibration program reads the sample and reference data files in Laser photonics format, extracts the spectral data, and converts them into standard IEEE data format. A simple procedure is implemented for peakfinding, with the sample peak wavenumbers calculated from a calibration curve determined by least squares fitting to the reference wavenumbers. Provided the reference spectrum has a suitable distribution of peaks, a calibration precision of $\pm 0.0002 cm^{-1}$ or better is obtained over the full width of the diode laser scan, of the same order as the original standard reference. Given the rapid ongoing improvement in availability of good reference spectra for all regions, this program offers a simple reliable and automatic procedure for accurate measurement of diode laser data. Description: Author Institution: Molecular Physics Division, National Institute of Standards and Technology; CEMAID \& Physics Department, University of New Brunswick; Dipartimento di Fisica, dell'Univerisit\`{a} di Pisa URI: http://hdl.handle.net/1811/13256 Other Identifiers: 1994-TD-06