Overview of the NLOS Ultraviolet Communication Technology

Shubin, D. N.; Lobov, E. M.; Varlamov, V. O.

doi:10.1109/synchroinfo49631.2020.9166129

Cited by 13 publications

(2 citation statements)

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“…Weak light detection in the ultraviolet (UV) band is widely used for diverse applications such as corona discharge detection 1 , non-line-of-sight communications 2 , biological detection 3 , UV astronomy 4 , and UV Lidar 5 . Single-photon detector (SPD) provides a kind of tool with the limit of sensitives for weak light detection.…”

Section: Introductionmentioning

confidence: 99%

Free-running 4H-SiC single-photon detector with ultralow afterpulse probability at 266 nm

Yu¹,

Li²,

Zhao³

et al. 2023

Preprint

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Ultraviolet single-photon detector (UVSPD) provides a key tool for the applications requiring ultraweak light detection in the wavelength band. Here, we report a 4H-SiC single-photon avalanche diode (SPAD) based free-running UVSPD with ultralow afterpulse probability. We design and fabricate the 4H-SiC SPAD with a beveled mesa structure, which exhibits the characteristic of ultralow dark current. We further develop a readout circuit of passive quenching and active reset with tunable hold-off time setting to considerably suppress the afterpulsing effect. The nonuniformity of photon detection efficiency (PDE) across the SPAD active area with a diameter of ∼ 180 µm is investigated for performance optimization. The compact UVSPD is then characterized, exhibiting a typical performance of 10.3% PDE, 133 kcps dark count rate and 0.3% afterpulse probability at 266 nm. Such performance indicates that the compact UVSPD could be used for practical ultraviolet photon-counting applications.

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Section: Introductionmentioning

confidence: 99%

Free-running 4H-SiC single-photon detector with ultralow afterpulse probability at 266 nm

Yu¹,

Li²,

Zhao³

et al. 2023

Preprint

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show abstract

“…Gallium-Nitride-based μLEDs can emit light from the solar-blind ultraviolet (UV) to the visible, and have several benefits for OWC in including high bandwidths which can support Gb/s data rates per µLED pixel [2]. Furthermore, there is increasing interest in UV OWC as the properties of UV light, such as strong atmospheric scattering, support applications such as non-line of sight (NLOS) communication [3]. UV OWC in the solar-blind region of the electromagnetic spectrum (UV-C band) can also take advantage of a naturally background-free environment.…”

Section: Introductionmentioning

confidence: 99%