Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Axicon"”.
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Acoustic Radiation Force on a Fluid to Fluid Boundary by Phase Plate Focused Ultrasound
… In its first application to acoustics, a fraxicon lens was developed to approximate the field generated by an axicon. This type of lens creates a minimally diffractive Bessel beam and long depth of focus that is useful in ultrasonic imaging, therapy, and non-destructive evaluation …
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Generation and imaging of structural laser beams for optical trapping of airborne particles and light-matter interaction applications.
… generation of a static Bessel beam shaped by an axicon to be used with high-intensity femtosecond laser pulses. The first set of experiments explores the construction of a slow-diverging optical funnel based on the generation of a higher-order BG beam using a continuous wave (cw) laser beam and a …
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Generation and imaging of structural laser beams for optical trapping of airborne particles and light-matter interaction applications.
… generation of a static Bessel beam shaped by an axicon to be used with high-intensity femtosecond laser pulses. The first set of experiments explores the construction of a slow-diverging optical funnel based on the generation of a higher-order BG beam using a continuous wave (cw) laser beam and a …
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Confinement and Tracking of Brownian Particles in a Bessel Beam Standing Wave
… traps. To accomplish this, we used an axicon-generated, zeroth-order Bessel beam standing wave whose parameters were adjusted to allow tight axial confinement and loose transverse confinement of microscopic-sized particles in the central maximum of the Bessel beam. We chose a Bessel …
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High power pulsed ytterbium doped fibre lasers and their applications
… well as temporal pulse shaping. Using a pair of axicon lenses the normal Gaussian beam profile was converted to a ring shaped profile as required and the system tested up to average powers of 100 W. In addition to the normal temporal pulse shapes required using our pulse shaping system (square, …