Bessel Beam Generation Using A Segmented Deformable Mirror

Abstract

Bessel beams with tunable spot size are desirable for many applications such as laser material processing, optical trapping, and imaging. In this paper, we report experimental and simulation results of using a segmented deformable mirror to generate zero- and higher-order Bessel beams that have a controllable transverse and longitudinal shape. The tilt angle and piston position of the mirror segments are optimized to recreate the phase structure of a reflective axicon. Zero-order Bessel beams are generated at various beam converging angles, and their core diameter, peak intensity, and depth-of-focus are found to agree with the calculated results. By applying a phase ramp along the azimuthal direction, the first-order Bessel beam is generated with the characteristic annular shape. Because deformable mirrors have low absorption and dispersion and operate at a fast frame rate, they are a promising candidate for spatial beam shaping of high-power ultrafast lasers, which are used in material processing applications.

Publication Date

6-1-2018

Publication Title

Applied Optics

Volume

57

Issue

16

Number of Pages

4677-4682

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.57.004677

Socpus ID

85047985697 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85047985697

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