Abstract
We introduce an inexpensive application of a Fabry–Perot etalon to control long-term UV-laser line drift in atmospheric NO laser-induced fluorescence (LIF) measurements by monitoring the visible fundamental of a pulsed dye laser. A linear image sensor captures the interference pattern, and the dye grating can be adjusted to maintain a fixed wavelength through an interface with labview software. Results indicate that the laser wavelength can be fixed to an accuracy of ±0.0001 nm in the dye fundamental and ±0.00003 nm in the UV beam. Hence the average error in the LIF signal owing to fluctuations in spectral overlap between the laser and the NO absorption transition decreases from ∼5 to ∼0.05%, which results in improved measurement accuracy.
© 1997 Optical Society of America
Full Article | PDF ArticleMore Like This
P. L. Stricklin and D. C. Jacobs
Appl. Opt. 31(33) 6983-6986 (1992)
Noureddine Melikechi, Shubhagat Gangopadhyay, and Edward E. Eyler
Appl. Opt. 36(30) 7776-7778 (1997)
Yici Guo, Q. Z. Wang, N. Zhadin, Feng Liu, S. Demos, D. Calistru, A. Tirksliunas, A. Katz, Y. Budansky, P. P. Ho, and R. R. Alfano
Appl. Opt. 36(4) 968-970 (1997)