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Spatial and temporal pulse shaping for lateral and depth resolved two-photon excited fluorescence contrast

Kussicke, A. Tegtmeier, M. Buchau, F. Heyne, K. Lindinger, A. – 2020

Title
Spatial and temporal pulse shaping for lateral and depth resolved two-photon excited fluorescence contrast
Author
Kussicke, A. Tegtmeier, M. Buchau, F. Heyne, K. Lindinger, A.
Publisher
Journal of Physics B-Atomic Molecular and Optical Physics (2020), 53: 2; 025401
Date
2020

We report combined temporal and spatial laser pulse shaping to perform lateral and depth dependent two-photon excited fluorescence of dyes. For generating the specific spatially and temporally phase tailored pulses a temporal pulse shaper and a subsequent spatial pulse shaper are employed. Simultaneous spatial and temporal shaping is presented for two-photon excited fluorescence by applying temporal third order phase functions on spatially different light field components. Moreover, the prospects of spatial shaping are demonstrated by applying various lateral two-photon fluorescence pattern. In particular, a depth dependent excitation of different dyes is performed which leads to a high axially resolved fluorescence contrast. The introduced spatial and temporal shaping technique provides new perspectives for biophotonic imaging applications.