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We review the progress in time-stretched ADC technology and how this quintessential microwave photonic technology has spun off into ultrafast imaging that is being used for early detection of cancer.
Terahertz generations were demonstrated in periodically poled lithium niobate and lithium tantalate crystals around 1-2 THz. Different forward and backward terahertz radiations are possible in periodically poled structures via difference frequency generation within the ultra-broad pump laser. The generated THz pulses could be controlled by the quasi-phase matching structures.
We demonstrate the generation of a 700-nm-wide, nanosecond, infrared continuum using a compact, passively Q-switched laser pumped by a 1.2 W diode and a novel photonic crystal fiber with zero dispersion near 1550 nm.
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