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WOP, U Southampton Develop Z Polarizers

Photonics Spectra
Nov 2011
Workshop of Photonics (WOP) of Vilnius, Lithuania, has collaborated with the Optoelectronics Research Centre (ORC) at the University of Southampton in the UK to develop a direct laser writing technique for producing radial polarization converters. Called Z polarizers, the devices are applied to laser machining systems and are resistant to high-power laser radiation because of their monolithic fused silica window design. Antireflection coatings can be applied. The WOP and ORC laboratories expect to prove the advantages of Z polarizers in laser micromachining, such as decreased spot size and uniformity of light-material interaction regardless of machine direction.


GLOSSARY
polarization
With respect to light radiation, the restriction of the vibrations of the magnetic or electric field vector to a single plane. In a beam of electromagnetic radiation, the polarization direction is the direction of the electric field vector (with no distinction between positive and negative as the field oscillates back and forth). The polarization vector is always in the plane at right angles to the beam direction. Near some given stationary point in space the polarization direction in the beam...
raman spectroscopy
That branch of spectroscopy concerned with Raman spectra and used to provide a means of studying pure rotational, pure vibrational and rotation-vibration energy changes in the ground level of molecules. Raman spectroscopy is dependent on the collision of incident light quanta with the molecule, inducing the molecule to undergo the change.  
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