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Proceedings Paper

Non-conventional optomechanical choppers: analysis and design of novel prototypes
Author(s): Virgil-Florin Duma; Dorin Demian; Eduard Sebastian Csukas; Nicolina Pop; Octavian Cira
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Paper Abstract

Optical choppers are widely used in laser systems – for light modulation and/or attenuation. In their most used and wellknown configuration, they are built as a rotational wheel with windows, which transforms a continuous-wave laser beam into a series of impulses with a certain frequency and profile. We briefly present the analysis and design we have completed for the classical chopper wheels (i.e., with windows with linear margins) for both top-hat and Gaussian laser beams. Further on, novel chopper wheels configurations, with outward or inward semi-circular (or with other non-linear shaped) margins of the windows is pointed out; we completed for them both analytic functions and simulations, for both top-hat and Gaussian beams, in order to deduce their transmission functions (i.e., the time profile of the laser impulses generated by the device). The stress of the presentation is put on the novel choppers with shafts (patent pending); their transmission functions are pointed out for top-hat laser beams. Finally, an example of such choppers is considered, with regard to the necessary Finite Element Analysis (FEA) that has to be performed for their rotational shaft. Both the mechanical stress and the deformations in the shaft have to be taken into account, especially at high rotational speeds of the mobile element.

Paper Details

Date Published: 16 October 2017
PDF: 5 pages
Proc. SPIE 10448, Optifab 2017, 104481W (16 October 2017); doi: 10.1117/12.2275937
Show Author Affiliations
Virgil-Florin Duma, Aurel Vlaicu Univ. of Arad (Romania)
Politehnica Univ. of Timisoara (Romania)
Dorin Demian, Aurel Vlaicu Univ. of Arad (Romania)
Eduard Sebastian Csukas, Politechnica Univ. of Timisoara (Romania)
Nicolina Pop, Politechnica Univ. of Timisoara (Romania)
Octavian Cira, Aurel Vlaicu Univ. of Arad (Romania)

Published in SPIE Proceedings Vol. 10448:
Optifab 2017
Julie L. Bentley; Sebastian Stoebenau, Editor(s)

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