IMPROVED BI-SPECTRAL DETECTOR
    2.
    发明申请

    公开(公告)号:US20210288095A1

    公开(公告)日:2021-09-16

    申请号:US17258089

    申请日:2019-06-21

    Abstract: An optical detector that is sensitive in at least two infrared wavelength ranges: first spectral band and second spectral band; and having a set of pixels, comprising: an absorbent structure disposed on a lower face of a substrate and comprising a stack of at least one absorbent layer made of semi-conductor material; the detector further comprising a plurality of dielectric resonators on the upper surface of said substrate forming an upper surface metasurface, the metasurface configured to diffuse, deflect and focus in the pixels of the detector in a resonant manner, when illuminated by the incident light, a first beam having at least one first wavelength included in the first spectral band and a second beam having at least one second wavelength included in the second band, the metasurface also being configured so that said first and second beams are focused on different pixels of the detector.

    FREE SPACE OPTICAL FSO SPACE DATA TRANSMISSION SYSTEM IN THE INFRARED WAVELENGTH DOMAIN

    公开(公告)号:US20210194583A1

    公开(公告)日:2021-06-24

    申请号:US17121508

    申请日:2020-12-14

    Applicant: THALES

    Abstract: A free space optical FSO space data transmission system includes a first ground or aeronautical optical terminal, a second optical terminal housed on board a satellite, and a relay platform. The relay platform is configured so as to move at an altitude higher than that of clouds and atmospheric turbulence, so as to receive the data transmitted by the first terminal in the MWIR/LWIR domain of long wave infrared LWIR wavelengths and/or medium wave infrared MWIR wavelengths, and retransmit the received data to the second terminal in the domain of short wave infrared SWIR wavelengths, and/or receive the data transmitted by the second terminal in the domain of short wave infrared SWIR wavelengths, and retransmit the received data to the first terminal in the MWIR/LWIR domain of long wave infrared LWIR wavelengths and/or medium wave infrared MWIR wavelengths.

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