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August 2019

Shortwave infrared lasers for versatile optical imaging applications

August 20 @ 2:00 pm - 3:00 pm

Co-sponsored by: IEEE MTT/AP Joint Chapter Abstract This talk will present our recent progress for shortwave infrared wavelength (1.7 mm to 2 mm) laser sources for versatile optical imaging applications in multi-time scale. In particular, by leveraging various photonics technologies such as wavelength conversion, time-stretch, parametric amplification, and fiber nonlinearities, we have demonstrated (1) femtosecond/picosecond pulsed source for two-photon/three-photon microscopy (2PM/3PM); (2) nanosecond pulsed source for photoacoustic microscopy (PAM); (3) wavelength-swept source for ultrafast imaging such as time-stretch microscopy and…

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Electromagnetic Sensing and Treatment of Living Things: Using Microwaves to Detect and Treat Disease in Humans and Trees

August 22 @ 2:00 pm - 3:00 pm

Co-sponsored by: IEEE MTT/AP Joint Chapter Abstract Because of their ability to penetrate and heat, electromagnetic waves have found use in several unusual applications, specifically in interaction with biological tissue. Microwave radar has been used as an anatomic imaging modality for detecting breast cancer, and THz radiation is being proposed for vulnerable plaque identification. Using a simple conformal antenna, microwave sensing of trees can alert arborists if there is an otherwise undetectable infestation of Asian Long-Horned beetle. By depositing microwave…

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Localizing tunnel positions under rough surfaces with underground focused synthetic aperture radar

August 22 @ 3:00 pm - 4:00 pm

Co-sponsored by: IEEE MTT/AP Joint Chapter Abstract Underground tunnels present both military and homeland security threats since smugglers use them as transit routes for trafficking weapons, explosives, people, drugs, and other illicit materials. Detecting and imaging the presence of tunnels in any given region of ground is possible because the air that fills them is materially quite different from anything else underground. Spotlight Synthetic Aperture Radar (SL-SAR) has been used to detect tunnels due to its ability to scan large…

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