Coherent, focus-corrected imaging of optical fiber facets using a single-pixel detector.
Coherent, focus-corrected imaging of optical fiber facets using a single-pixel detector.
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DOI：
10.1364/ol.39.006034
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发表时间：
2014-10
期刊：
影响因子：
3.6
通讯作者：
G. Gordon;Feng Feng-Feng;Q. Kang;Yongmin Jung;J. Sahu;T. Wilkinson
中科院分区：
文献类型：
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作者：
G. Gordon;Feng Feng-Feng;Q. Kang;Yongmin Jung;J. Sahu;T. Wilkinson
提出了一种仅使用相位型硅基液晶空间光调制器和单像素探测器就能获得光纤端面精确振幅和相位图像的新型成像技术。该系统可以在两个正交偏振下拍摄图像，因此为多模光纤的模态表征提供了强大的工具，由于其在电信和医疗应用中的迅速发展，多模光纤的模态表征变得越来越重要。该技术首先使用模拟退火算法来计算从光纤端面的小区域收集光的全息图。接下来，使用SLM上的自适应像差校正来使光纤小平面自动聚焦。最后，使用SLM创建共路干涉仪，并确定每个像素处的光场相位。最后，高清晰度的环形芯折射率光纤的振幅和相位图像作为该技术的原理证明。
A novel imaging technique that produces accurate amplitude and phase images of an optical fiber facet using only a phase-only liquid-crystal on silicon (LCOS) spatial light modulator (SLM) and a single-pixel detector is presented. The system can take images in two orthogonal polarizations and so provides a powerful tool for modal characterization of multimode fibers, which is of increasing importance due to their burgeoning use in telecommunications and medical applications. This technique first uses a simulated annealing algorithm to compute a hologram that collects light from a small region of the fiber facet. Next, the fiber facet is automatically brought into focus using adaptive aberration correction on the SLM. Finally, a common-path interferometer is created using the SLM, and the phase of the optical field at each pixel is determined. Finally, high-definition amplitude and phase images of a ring-core refractive index fiber are presented as a proof-of-principle demonstration of the technique.