Paper 13351-30
Paper 13351-30
Elongation of the transverse profile of the Optical Needle using nondiffracting Airy beams and laser microprocessing of glasses
28 January 2025 • 5:35 PM - 5:55 PM PST | Moscone South, Room 214 (Level 2)
Abstract
Significant progress in laser beam shaping has been driven by scientific and industrial demands. Nondiffracting beams, such as Bessel beams, are widely used for communication, imaging, and laser microprocessing due to their self-healing and resistance to diffraction. However, controlling the elongation of an optical needle's transverse profile remains a key requirement. This study proposes using nondiffracting Airy beams and a binary phase mask to achieve this control. Performance is evaluated through numerical simulations and experimental assessments, focusing on metrics like the major-to-minor axis ratio, needle length, and stability. A flat optical element is created using geometrical phase induced by nanogratings inscribed with a femtosecond laser. The geometrical phase element's performance is validated through laser microprocessing of transparent glasses, with reported experimental results.
Presenter
Sergej Orlov
Ctr. for Physical Sciences and Technology (Lithuania)
Dr. S. Orlov obtained his doctorate degree at the Vilnius University, in the year 2007 with the thesis titled “Propagation and parametric interaction of complex structure light beams”. He spent 8 years in top German institutions: Friedrich Alexander University, where he worked on a project of Alexander von Humboldt Society, and Max Plank's Light Science Institute, where he carried out Max Plank's Society projects.
He developed a versatile technique to experimentally measure with a nano-interferometric precision complicated polarized light structures: a radially and azimuthally polarized light, a beam with the transverse angular momentum (photonic wheel), and the light twisted into the Mobius strip.
He returned to Lithuania to become the head of the Coherent Optics Laboratory, where structured light, its generation, applications, properties, and characterization methods are investigated. Designs of photonic elements are developed, manufactured, applied for laser processing, imaging