Generation of quasi-Bessel beams and femtosecond optical X-waves with conical mirrors

A thin film deposition technique has been used to fabricate conical mirrors (also called reflective axicons). The quality of the conical mirrors so produced is investigated experimentally by mechanical and optical techniques. Quasi-Bessel beams produced by illuminating these axicons with a He-Ne laser show very good agreement with diffraction theory. We also consider the generation of femtosecond (10-25 fs) optical X-waves.

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