Interference diagnostics of white-light vortices

Focusing and correlation properties of white-light optical vortices.

We generate double-charge white-light optical vortices by sending a circularly polarized partially incoherent light through an uniaxial crystal. We show that the generated polichromatic vortices are structurally stable, and their correlation properties can be altered by the beam focusing, resulting in changes of the vortex core visibility.

Generation of optical bottle beams by incoherent white-light vortices.

We generate experimentally optical bottle beams from incoherent double-charge white-light vortices, and show that their parameters can be efficiently controlled by varying the beam focusing conditions.

On the Synthesis of Coronal White-Light Polarization Diagnostics

Optical profiling using white light interference in spectral domain

The rapidly developing fields of Micro-Electro Mechanical System (MEMS) and micro optics require non contact and high precision measurements. Optical profilers are ideally suited for this. Monochromatic Phase Shifting Interferometry(PSI) can be used to measure slowly varying profiles and step height of less than half a wavelength. White light interferometry is used when large step height are to...

Interference of Light

When plane waves come in contact with a barrier that is not significantly larger than their wavelength, the waves spread out into spherical waves (figure 1). The effect is to allow waves to spread out in all directions from the edges of the barrier, a phenomenon called diffraction. This spreading enables the waves to “go around corners”. If two or more rays pass through the same point in space ...