The performance and sensitivity of an intensified CCD array system and a nonintensified CCD array detector system are compared for laser-induced breakdown spectroscopy (LIBS). LIBS measurements were recorded in a calcium-based aerosol-seeded gas stream at ambient pressure. The signal-to-noise ratio based on the 393.37-nm calcium emission line was calculated as a function of detector delay with respect to the plasma-initiating laser pulse. Both ensemble-averaging and single-shot spectral analyses were performed. For all conditions, the intensified CCD system provided an enhanced signal-to-noise ratio compared with the nonintensified CCD system.
© 2003 Optical Society of America
Original Manuscript: February 17, 2003
Revised Manuscript: June 24, 2003
Published: October 20, 2003
Jorge E. Carranza, Emily Gibb, Ben W. Smith, David W. Hahn, and James D. Winefordner, "Comparison of nonintensified and intensified CCD detectors for laser-induced breakdown spectroscopy," Appl. Opt. 42, 6016-6021 (2003)