Non-scanning picosecond fluorescence

IV. Non-scanning Picosecond Fluorescence Kerr Gate Microscope.63... 

IV. NON-SCANNING PICOSECOND FLUORESCENCE KERR GATE MICROSCOPE... 

A. Apparatus of the Non-Scanning Picosecond Fluorescence Kerr Gate Microscope... 

A schematic diagram of the non-scanning picosecond fluorescence Kerr gate microscope is depicted in Figure 3.9a. A femtosecond Ti sapphire laser with regenerative amplifier provided femtosecond pulses (800 nm, 1 mJ, 110 fs) at a... 

FIGURE 3.9 Schematic diagram of the non-scanning picosecond fluorescence Kerr-gate microscope, (a) The microscope part, and (b) the Kerr gate part. (From Fujino, T., Fujima, T., and Tahara, T., Appl. Phys. Lett., 87 131105-131107, 2005. Used with permission.)... 

An excellent alternative to the streak camera approach is fluorescence time resolution by the "up-conversion" method, which we describe in detail below. In the simplest form of this technique, non-linear optical methods are employed to essentially construct a picosecond "shutter" or "gate". In most applications a single emission datum is acquired for each laser pulse, i.e. I(t=constant, X=constant). By repeating the experiment at different delay times, kinetic traces can be acquired that are of comparable quality to those obtained by streak camera methods (16-17). Alternatively, if delay time is held constant but X is scanned, high quality emission spectra can be obtained (3). 

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