Digital micro-mirror devices for laser beam shaping

Mitchell A. Cox; Ling Cheng; Andrew Forbes

doi:10.1117/12.2501348

24 January 2019 Digital micro-mirror devices for laser beam shaping

Mitchell A. Cox, Ling Cheng, Andrew Forbes

Proceedings Volume 11043, Fifth Conference on Sensors, MEMS, and Electro-Optic Systems; 110430Y (2019) https://doi.org/10.1117/12.2501348
Event: Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, 2018, Skukuza, South Africa

Abstract

Structured laser beams have numerous applications, for example mode division multiplexing, optical tweezers and even astronomy. Spatial Light Modulators are typically used to display digital holograms, however they have a low refresh rate, only work with a single polarisation and operate on a limited range of wavelengths. Digital Micro-mirror Devices are able to spatially modify the amplitude of incident light as opposed the the phase and are increasing in popularity due to their high refresh rate, polarisation and wavelength invariance and they are able to work as digital holograms with the right encoding. We describe how these devices may be used in a laboratory environment for modal decomposition as well as some of their disadvantages. We describe a method to accurately measure the flatness of a DMD, which is one of the major issues with the devices.

Citation Download Citation

Mitchell A. Cox, Ling Cheng, and Andrew Forbes "Digital micro-mirror devices for laser beam shaping", Proc. SPIE 11043, Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, 110430Y (24 January 2019); https://doi.org/10.1117/12.2501348

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