Attempts to use the linear behavior of Raman spectroscopic measurements in operations such as spectral subtraction may be vitiated by abscissa errors which are smaller than one sampling interval. This paper describes methods, based upon least-squares fitting and Fourier-domain phase shifting, which can be used to locate the positions of peak maxima within 0.05 cm<sup>−1</sup>. A procedure is described to allow use of these determinations to shift the position of data sets along the X-axis my amounts less than one sampling interval. The effectiveness of this detection and correction procedure is demonstrated by measuring adjusted peak positions. Factor analysis is also used as a probe to examine the operation.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
Login to access OSA Member Subscription