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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 52, Iss. 7 — Jul. 1, 1998
  • pp: 928–932

Two-Photon Excitation Profiles in Cylindrical Capillaries

K. S. Overway and F. E. Lytle

Applied Spectroscopy, Vol. 52, Issue 7, pp. 928-932 (1998)


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Abstract

Poor detection limits of two-photon excited fluorescence in cylindrical capillaries are attributed to photothermal expansion and beam astigmatism. Photothermal expansion is demonstrated for excitation in a 1 cm cell and is inferred for the larger diameter capillaries. Astigmatism is caused by focal differences between rays in a plane longitudinal to the capillary and rays in a plane transverse to the capillary. Data were obtained by integrating the fluorescence from variously sized cylindrical and square capillaries, and by photographing the fluorescence within a 1 cm cell.

Citation
K. S. Overway and F. E. Lytle, "Two-Photon Excitation Profiles in Cylindrical Capillaries," Appl. Spectrosc. 52, 928-932 (1998)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-52-7-928

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