Focusing of scattering light based on wavefront feedback shaping technology

Bote Qi; Lihua Shen; Rui-Pin Chen

doi:10.1117/12.2602517

9 October 2021 Focusing of scattering light based on wavefront feedback shaping technology

Bote Qi, Lihua Shen, Rui-Pin Chen

Proceedings Volume 11897, Optoelectronic Imaging and Multimedia Technology VIII; 1189703 (2021) https://doi.org/10.1117/12.2602517
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

Light scattering is inevitable in optical imaging and random speckles will be formed when light passes through the scattering media due to the influence of multiple scattering. Recent research results show that the super-resolution imaging can be achieved by the scattering effect.In this work, the effective focusing of the laser beam through the is realized when the wavefront of the incident light is modulated by the feedback optimization algorithm (area-by-area modulation algorithm) with the spatial light modulator. The experiment results indicate that the maximum light intensity growth factor (132 in this work) and the focusing spot size (1/10 compared to the traditional lens focusing) are dependent on the total number of modulation units on the spatial light modulator and the phase accuracy of each modulation unit. In particular, the focusing of a vector beam through the scattering media provides a new way to control the the maximum light intensity growth factor and the focusing spot size.

Conference Presentation

Citation Download Citation

Bote Qi, Lihua Shen, and Rui-Pin Chen "Focusing of scattering light based on wavefront feedback shaping technology", Proc. SPIE 11897, Optoelectronic Imaging and Multimedia Technology VIII, 1189703 (9 October 2021); https://doi.org/10.1117/12.2602517

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