Time domain spectral LiDAR enabled by cascaded Raman in a hydrogen-filled fiber transmitter

We introduce what we believe to be novel spectral light detection and ranging (LiDAR) architectures that enable ultra-compact systems by a transition from spectral signal processing in space (gratings) to processing in time. The architectures leverage temporal dispersion and the unique spectro-tempo...

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Bibliographic Details
Published in:Optics express 2024-11, Vol.32 (24), p.42240
Main Authors: Martin, Richard K., Courtney, Trevor L., Adams, Arielle M., Leaird, Daniel E., Ausley, Luke, Keyser, Christian K.
Format: Article
Language:English
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Summary:We introduce what we believe to be novel spectral light detection and ranging (LiDAR) architectures that enable ultra-compact systems by a transition from spectral signal processing in space (gratings) to processing in time. The architectures leverage temporal dispersion and the unique spectro-temporal waveforms produced from the cascaded Raman scattering generated in the (H 2 ) filled hollow core fiber. The characterized Raman source yields as many as six Raman orders from 1.06-1.70 μ m; their unique spectro-temporal waveforms are measured. System performance simulations based on measured Raman waveforms show that high accuracy measurement of range and reflectivity are possible with proper selection of signal-to-noise ratio and detector bandwidth. Materials classification analysis based on the system performance analysis shows that near-optimal classification is feasible with time domain processing.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.536963