Work

High-efficiency multi-spot beam generation with an all-fiber SMF-SCF structure

Year: 2025

Type: article

Abstract: We propose an efficient, fully fiber-based method for generating multi-spot beam patterns using single-mode fiber (SMF) and square-core fiber (SCF) structures. This technique leverages multimode interference in the SCF to produce configurable square lattice beam patterns, such as 2 × 2, 3 × 3, and 4 × 4 arrays, by simply adjusting the SCF length. Both simulations and experiments at a wavelength of 1060 nm validate the approach, demonstrating high power uniformity, minimal loss, and excellent stability across beam configurations. Initial testing of multi-spot laser drilling on metal surfaces shows that increased beam spot counts can significantly enhance processing efficiency. This SMF-SCF structure offers substantial potential for scalable, compact, and high-precision applications in photonics, laser manufacturing, and biomedical imaging, where rapid processing and parallel operation are critical.

Source: Optics Express

DOI: 10.1364/oe.554649

Authors: Yongmin Jung, Natasha Vukovic, Christophe A. Codemard, Michalis N. Zervas

Institution: TRUMPF (United Kingdom)

Language: English

Topic: Photonic Crystal and Fiber Optics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Engineering and Physical Sciences Research Council