Work

Speckle induced by reflections in pipe propagation of a structured laser beams

Year: 2025

Type: article

Abstract: This study explores how reflections affect the transverse intensity profile of a structured laser beam (SLB) in alignment systems. The research evaluates the impact of pipe material and geometry on noise affecting the inner core (IC) of the SLB's transverse intensity profile. The results show that using a vacuum pipe setup with a black, undulated pipe of high surface roughness and a low-coherence laser source significantly reduces noise, enhancing the detection accuracy of the IC. A 140 m long-distance measurement demonstrates that discrepancies between various position detection algorithms are reduced to sub-pixel levels with such a setup. These findings facilitate the development of highly accurate and reliable optical alignment systems based on a reference line defined by an SLB.

Source: Applied Optics

DOI: 10.1364/ao.557066

Authors: Witold Niewiem, Sebastian Figura, Dirk Mergelkuhl, Jean-Christophe Gayde, Miroslav Sulc, Andreas Wieser

Institutions: Cracow University of Technology, Technical University of Liberec, Czech Academy of Sciences, Institute of Plasma Physics

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: CERN

OpenAlex ID: W4410225170

FWCI: 0.369

Cites: 34

Cited by: 1

Related to: 10