Vol. 38, issue 04, article # 8

Abstract:

The two-pulse synchronous excitation method used for remote laser diagnostics of matter has recently attracted great interest, since it significantly expands the capabilities of traditional methods of single-pulse laser action. However, the practical implementation of the method requires strict synchronization of the instants of sending laser pulses and automated control of their time positions. Obviously, the two-pulse excitation scheme needs in more complex equipment and complicates the application of the method. The use of standard laser trigger and control tools is expensive and cumbersome and not always applicable. The article presents the specialized system for triggering laser pulses with a capability of recording the shape and position of excitation pulses with their subsequent display on a single time scale. A structural diagram and technical characteristics of the device are given. An example of using the laser trigger system to ensure the operation of a research stand for remote laser detection of organophosphorus compounds by the two-pulse laser fragmentation method of laser-induced fluorescence (LF/LIF method) is described. The developed synchronization system can be used in optical diagnostic methods, where synchronous action of two or more independent laser sources is required, to set and control the time delay between their optical pulses.

Keywords:

laser triggering, laser fragmentation, phosphorus oxide, PO fragments, laser-induced fluorescence

Figures:

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