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Generation of Bessel beams via femtosecond direct laser writing 3D phase plates.

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Featuring diffracting-free propagation and self-reconstruc-tion, Bessel beams (BBs) have sparked great interest in the scientific community. These properties give the potential for application in optical communications, laser machining, and optical… Click to show full abstract

Featuring diffracting-free propagation and self-reconstruc-tion, Bessel beams (BBs) have sparked great interest in the scientific community. These properties give the potential for application in optical communications, laser machining, and optical tweezers. However, generating such beams with high quality is still challenging. Here, by using the femtosecond direct laser writing (DLW) based on two-photon polymerization (TPP) technique, we convert phase distributions of ideal BBs with different topological charges into polymer phase plates. The experimentally generated zeroth- and higher-order BBs are propagation-invariant up to 800 mm. Our work may facilitate the applications of non-diffracting beams in integrated optics.

Keywords: femtosecond direct; laser writing; phase; bessel beams; direct laser; phase plates

Journal Title: Optics letters
Year Published: 2022

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