Invention Grant
US09574944B1 Systems and methods for high-contrast, near-real-time acquisition of terahertz images 有权
用于高对比度,近实时采集太赫兹图像的系统和方法

Systems and methods for high-contrast, near-real-time acquisition of terahertz images
Abstract:
A cw terahertz image beam is upconverted by a nonlinear optical process (e.g., sum- or difference-frequency generation with a near IR cw upconverting beam). The upconverted image is acquired by a near IR image detector. The bandwidths and center wavelengths of the terahertz image beam and the upconverting beam are such that wavelength filtering can be employed to permit an upconverted image beam to reach the detector while blocking or substantially attenuating the upconverting beam.
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