LOW-COHERENCE TERAHERTZ ILLUMINATION SOURCE FOR IMAGING APPLICATIONS
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United States of America
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Feb 13, 2025
app pub date -
Dec 13, 2022
filing date -
Dec 13, 2022
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Abstract
An illumination source emitting low-coherence electromagnetic radiation in the terahertz (THz) frequency range is disclosed. The source includes a THz radiation emitter that emits input THz radiation and an enclosure forming a cavity coupled to the THz radiation emitter. The enclosure includes an inner wall enclosing the cavity and having a reflective surface that reflects the input THz radiation within the cavity as circulating THz radiation, and an optical output port that allows a portion of the circulating THz radiation to exit from the cavity as output THz radiation after multiple reflections off the reflective surface, the output THz radiation having a reduced coherence compared to that of the input THz radiation. The source also includes an optical perturbation element that acts on the input or circulating THz radiation to contribute, along with the multiple reflections off the reflective surface, to achieving the reduced coherence of the output THz radiation.
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