By Topic

Subwavenumber charge-coupled device spectrometer calibration using molecular iodine laser-induced fluorescence

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Lambert, Joseph G. ; Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA ; Hernandez-Diaz, Carlos ; Williamson, J.Charles

Your organization might have access to this article on the publisher's site. To check, click on this link: 

Spectrometers configured with charge-coupled devices (CCD) or other array-based detectors require calibration to convert from the pixel coordinate to a spectral coordinate. A CCD calibration method well suited for Raman spectroscopy has been developed based on the 514.5 nm Ar+ laser-induced fluorescence (LIF) spectrum of room-temperature molecular iodine vapor. Over 360 primary and secondary I2 LIF calibration lines spanning 510–645 nm were identified as calibrant peaks using an instrumental resolution of 1 cm-1. Two instrument calibration functions were evaluated with these peaks: a second-order polynomial and a function derived from simple optomechanical considerations. The latter function provided better fitting characteristics. Calibration using I2 LIF was tested with measurements of both laser light scattering and Raman spectra. The I2 LIF reference spectra and the signal spectra were recorded simultaneously, with no cross talk, by separating the two signals spatially along the vertical axis of the CCD imager. In this way, every CCD image could be independently calibrated. An accuracy and a precision of ±0.05 cm-1 were achieved with this calibration technique.

Published in:

Review of Scientific Instruments  (Volume:81 ,  Issue: 1 )