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Published February 15, 2010 | Published
Journal Article Open

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

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 (μ_sl ~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.

Additional Information

© 2010 Optical Society of America. Received 11 Jan 2010; revised 31 Jan 2010; accepted 1 Feb 2010; published 2 Feb 2010. This work was funded by NIH under Grant No. R21EB008866-02.

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