Focusing polychromatic light with different spectrum bandwidth through turbid medium

Huiling Huang; Jun Han

doi:10.1117/12.2617470

15 February 2022 Focusing polychromatic light with different spectrum bandwidth through turbid medium

Huiling Huang, Jun Han

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 1216656 (2022) https://doi.org/10.1117/12.2617470
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

The incident laser beams randomly diffuse in turbid medium and form a volume complex speckle at the output field. In this paper, we demonstrate focusing of polychromatic light with different spectrum bandwidth through turbid medium by using feedback optimization algorithm with the help of spatial light modulator. Polychromatic light with different spectrum bandwidth is generated by a series of bandpass filters and super-continuum laser. Speckle patterns produced by polychromatic light with different spectral bandwidths are compared. And the influence of spectrum bandwidth on light intensity enhancement is investigated. Experimental results are found to be in good agreement with theoretical for light refocusing.

Citation Download Citation

Huiling Huang and Jun Han "Focusing polychromatic light with different spectrum bandwidth through turbid medium", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 1216656 (15 February 2022); https://doi.org/10.1117/12.2617470

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KEYWORDS

Spatial light modulators

Light scattering

Bandpass filters

Speckle pattern

Light sources

Scattering

Wavefronts

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