Abstract
The methods of elongation of the effective interaction area (>100 microns) of single femtosecond pulses with transparent dielectrics when focusing in the bulk of material are given. Principal diagrams of transparent materials perforation with single femtosecond laser pulses are proposed. Capability to form cylindrical holes in the transparent dielectrics as a result of material photodegradation subjected to single femtosecond laser pulses was successfully demonstrated. The diameter of through holes made in the polypropylene 50 microns thick film at the energy of femtosecond laser pulses of 5 µJ was 5 µm.
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