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Real-time two-dimensional imaging in scattering media by use of a femtosecond Cr~(4+):forsterite laser

机译:飞秒Cr〜(4+):镁橄榄石激光器在散射介质中的实时二维成像

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摘要

An original femtosecond Cr~(4+):forsterite laser source associated with a nonlinear optical correlator was used for imaging through scattering media with 1220-nm light. The system, which operates as an ultrafast optical gate by sum-frequency generation in a nonlinear crystal, was able to detect the light reflected from a resolution chart hidden in a turbid medium, at an attenuation of as much as 15 mean free paths. When the object was illuminated with a collimated beam, real-time two-dimensional images were obtained, with a maximum transverse resolution of ~20 μm.
机译:最初的飞秒Cr〜(4+):镁橄榄石激光源与非线性光学相关器相关联,用于通过散射介质以1220 nm光成像。该系统通过在非线性晶体中以总和频率产生作为超快光闸,能够检测隐藏在浑浊介质中的分辨率表反射的光,其衰减高达15条平均自由程。当用准直光束照射物体时,可获得实时二维图像,最大横向分辨率约为20μm。

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