Implementation of a digital optical phase conjugation system and its application to study the robustness of turbidity suppression by phase conjugation.
Implementation of a digital optical phase conjugation system and its application to study the robustness of turbidity suppression by phase conjugation.
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DOI：
10.1364/oe.18.003444
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发表时间：
2010-02-15
期刊：
影响因子：
3.8
通讯作者：
Yang C
中科院分区：
文献类型：
--
作者：
Cui M;Yang C
在这项工作中，我们报告了一种新颖的高容量（自由度数）开环自适应光学方法，称为数字光学相位共轭（DOPC），它提供了强大的光电光学相位共轭（OPC）解决方案。我们表明，我们的原型可以在约 3 度的范围内以约 3.9 x 10−3 度的精度对共轭光场进行相位共轭，并且可以通过相对较厚的浑浊介质 (μsl ~13) 对输入场进行相位共轭。此外，我们利用该系统来表明，通过相位共轭反转混浊介质中的随机散射是令人惊讶的鲁棒性并且可以适应相位误差。然而，具有显着空间相位误差（误差从 – π/2 到 π/2 均匀分布）的 OPC 波前可以通过散射介质进行 OPC 重建，其效率约为无相位误差 OPC 的 40%。
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.