Optical Techniques for Millimeter-wave Detection and Imaging

Optical Techniques for Millimeter-wave Detection and Imaging

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The benefits of imaging using regions of the electromagnetic spectrum outside the visible range have been known for decades. Infrared and radio frequency imaging techniques have achieved great successes in both military and civilian applications. However, there remains a range of the spectrum between these two regimes that remains relatively unexplored. Millimeter waves, or the range of wavelengths between one millimeter and one centimeter, have remained relatively unexplored as an imaging technology, largely due to the lack of sufficiently sensitive, practical detectors for passive imaging in this regime. At these short wavelengths, the diffraction limit imposed by the limited extent of the imaging aperture significantly limits attainable image resolution. Recent developments in semiconductor low-noise amplifiers have demonstrated many desirable applications for such imaging technology, but have, as yet, not been able to demonstrate the economical, small-format imagers necessary to make such imagers practical in most of the conceived applications.... Spectrum Analyzer (OSA) Optical Spectrum Analyzer (OSA) (Agilent 86142B) ( Agilent 86142B) Laser Source Laser Source (Mitsubishi 25mW Cooled ... 65 Optical Source selection Figure 4-1 Schematic layout of the initial detector testbed.

Title:Optical Techniques for Millimeter-wave Detection and Imaging
Publisher:ProQuest - 2007


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