Characterization of micrometer-size laser beam using a vibrating wire as a miniature scanner

S G Arutunian; A V Margaryan; G S Harutyunyan; E G Lazareva; A T Darpasyan; D S Gyulamiryan; M Chung; D Kwak

doi:10.1063/5.0028666

Characterization of micrometer-size laser beam using a vibrating wire as a miniature scanner

Rev Sci Instrum. 2021 Mar 1;92(3):033303. doi: 10.1063/5.0028666.

Authors

S G Arutunian¹, A V Margaryan¹, G S Harutyunyan¹, E G Lazareva¹, A T Darpasyan², D S Gyulamiryan², M Chung³, D Kwak³

Affiliations

¹ Alikhanyan National Scientific Laboratory, 0036 Yerevan, Armenia.
² Quantum College, 0046 Yerevan, Armenia.
³ Ulsan National Institute of Science and Technology, 44919 Ulsan, South Korea.

PMID: 33820063
DOI: 10.1063/5.0028666

Abstract

A new method for profile measurements of small transverse size beams by means of a vibrating wire is presented. A vibrating wire resonator with a new magnetic system was developed and manufactured to ensure that the wire oscillated in a single plane. Presented evidence gives us confidence that the autogenerator creates vibrations at the natural frequency of the wire in a plane of the magnetic system, and these vibrations are sinusoidal. The system for measuring the laser beam reflected from the vibrating wire by means of a fast photodiode was upgraded. The experiments allowed the reconstruction of a fine structure of the focused beam of the semiconductor laser using only a few vibrating wire oscillations. The system presented here would eventually enable the implementation of tomographic measurements of the thin beam profile.