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通过将飞秒激光脉冲耦合到空气石英微结构光纤,获得了超高纵向分辨率的光学相干CT成像.利用中心在540nm、可见光谱范围450~700nm的超连续光谱,可以获得高达0.64μm的自由空间纵向分辨率.光学相干CT系统灵敏度在样品光功率3mW时,可达到108dB,仅仅低于理论极限7dB.同时展示了亚细胞分辨的光学相干CT的图像,该高分辨光学相干CT在生物医学应用中有很好的前景.
Optical coherence CT imaging with ultra-high vertical resolution is achieved by coupling femtosecond laser pulses to airborne silica microstructured fibers. Up to 0.64 μm of freedom can be obtained using a supercontinuum centered 540 nm with a visible spectral range of 450-700 nm Spatial vertical resolution The optical coherence CT system achieves 108dB at a sample power of 3mW, which is only below the theoretical limit of 7dB. Images of sub-cellular resolved optical coherence CT are also shown, which are used in biomedical Application has a good future.