Implementation of a digital optical phase conjugation system and its application to study the robustness of turbidity suppression by phase conjugation

Discontinued Devices LC-R 2500 Spatial Light Modulators
Digital-/ Computer Holography/ CGH Misc.: Speckle / Characterization / Metrology
Published on:
Authors: Meng Cui, Changhuei Yang
Abstract:

“In this work, we report a novel high capacity (number of degrees of freedom) open loop adaptive optics method, termed digital optical phase conjugation (DOPC), which provides a robust optoelectronic optical phase conjugation (OPC) solution. We showed that our prototype can phase conjugate light fields with ~3.9 x 10−3 degree accuracy over a range of ~3 degrees and can phase conjugate an input field through a relatively thick turbid medium (μsl ~13). Furthermore, we employed this system to show that the reversing of random scattering in turbid media by phase conjugation is surprisingly robust and accommodating of phase errors. An OPC wavefront with significant spatial phase errors (error uniformly distributed from – π/2 to π/2) can nevertheless allow OPC reconstruction through a scattering medium with ~40% of the efficiency achieved with phase error free OPC.”

Open Access

Publication: Optics Express
Issue/Year: Optics Express, Vol. 18, Issue 4, pp. 3444-3455 (2010)_x000D_DOI: 10.1364/OE.18.003444
DOI: 10.1364/OE.18.003444
Link: https://doi.org/10.1364/OE.18.003444

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