Figure | Working principle and application scenarios of photon-level dual-comb spectroscopy. (IMAGE)
Caption
Figure | Working principle and application scenarios of photon-level dual-comb spectroscopy. a, schematic illustration of photon-counting statistical process. The dual-comb single-photon interference signal is reconstructed through statistical accumulation of photon arrival-time patterns. b, schematic configuration of the compact all-fiber system, enabling eye-safe and low-power consumption long-path turbulent remote sensing. Photon events are recorded as a time-series of “01” code sequences via the common-mode trigger protocol, which are subsequently used to reconstruct spectral information as depicted in (a). c, this field-deployable system is suitable for challenging applications, such as large-scale open-path environmental monitoring, and non-cooperative open-path DCS without the need for retroreflectors.
Credit
Wei Zhong et al.
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CC BY