Lens tilting effect on filamentation and filament-induced fluorescence

In filament-induced fluorescence spectroscopy, we experimentally found that if the lens used for the creation and localization of filament is tilted, the signal to noise ratio of spectral measurement increases. Further study shows that with lens tilting, astigmatism occurs and the filament is split...

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Bibliographic Details
Published in:Optics communications 2009-03, Vol.282 (5), p.950-954
Main Authors: Kamali, Y., Sun, Q., Daigle, J.-F., Azarm, A., Bernhardt, J., Chin, S.L.
Format: Article
Language:English
Subjects:
Beam trapping, self-focusing and defocusing
self-phase modulation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lenses, prisms, and mirrors
Nonlinear optics
Optical elements, devices, and systems
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary:In filament-induced fluorescence spectroscopy, we experimentally found that if the lens used for the creation and localization of filament is tilted, the signal to noise ratio of spectral measurement increases. Further study shows that with lens tilting, astigmatism occurs and the filament is split into shorter parts. In turn the shortening of filament reduces the generation of white light which is the major ‘noise’ source of the spectra.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2008.11.009