Scanning mirror based higher order Bessel-gaussian beams integrated in time (HOBBIT) with applications toward the photoacoustic effect

We demonstrate a new method for the generation of beams with rapidly tunable orbital angular momentum (OAM). This method is based on using a single-axis scanning galvanometer mirror to add a phase tilt on an elliptical Gaussian beam that is then wrapped to a ring using optics that perform a log-pola...

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Bibliographic Details
Published in:Optics express 2023-04, Vol.31 (9), p.14185-14195
Main Authors: Keith Miller, J, Free, Justin, McCoy, Hunter, Johnson, Eric G
Format: Article
Language:English
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Summary:We demonstrate a new method for the generation of beams with rapidly tunable orbital angular momentum (OAM). This method is based on using a single-axis scanning galvanometer mirror to add a phase tilt on an elliptical Gaussian beam that is then wrapped to a ring using optics that perform a log-polar transformation. This system can switch between modes in the kHz range and use relatively high power with high efficiency. This scanning mirror HOBBIT system was applied to a light/matter interaction application using the photoacoustic effect, with a 10 dB enhancement of the generated acoustics at a glass/water interface.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.484234