Non-mechanical beam steering using reflection-mode readout of volume gratings in a photorefractive material

Austin Scott; Partha Banerjee; Jonathan Slagle

doi:10.1117/12.2569838

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20 August 2020 Non-mechanical beam steering using reflection-mode readout of volume gratings in a photorefractive material

Austin Scott, Partha Banerjee, Jonathan Slagle

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Proceedings Volume 11498, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIV; 114980G (2020) https://doi.org/10.1117/12.2569838
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

A method for writing programmable volume phase gratings into photorefractive materials using visible wavelengths in a transmission geometry, and then subsequently probing these gratings in a reflection geometry using infrared (IR) wavelengths to achieve specific angles of reflection of the probe beam is analyzed. The programmable features of these gratings include grating spacing and tilt, or K-vector magnitude and orientation. Relationships have been derived between the incidence angles of the writing beams and the corresponding reflection angles of the IR probe beam. More specifically, for a fixed angle of incidence of the probe beam, two unique writing beam angles can be found which generate a grating with the correct spacing and tilt to reflect and steer the probe beam through a wide field of desired angles.

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Austin Scott, Partha Banerjee, and Jonathan Slagle "Non-mechanical beam steering using reflection-mode readout of volume gratings in a photorefractive material", Proc. SPIE 11498, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIV, 114980G (20 August 2020); https://doi.org/10.1117/12.2569838

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