Shaping the fundamental and second harmonic beams using patterned facets in lithium triborate

Danveer Singh, Roy Shiloh, Ady Arie

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate a new method for high resolution patterning of the facets of a nonlinear crystal, LiB3O5, based on lithographic exposure of its anti-reflection coating layer, followed by ion beam milling. This crystal is attractive for high intensity frequency conversion due to its high damage threshold. We demonstrate an application of our patterning method for shaping the fundamental beam, as well as the second harmonic beam that is generated in the crystal. We fabricated six different phase masks that generated the following beam profiles in both wavelengths: on- and off-axis high order Hermite-Gaussian beam, Airy beam, vortex beam, lens and a periodic Bragg grating. Such an optical device opens up new possibilities for compact beam shaping in high power nonlinear interaction in a broad range of frequencies.

Original languageEnglish
Pages (from-to)2654-2661
Number of pages8
JournalOptical Materials Express
Volume8
Issue number9
DOIs
StatePublished - 2018

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