1.79-GHz acquisition rate absolute distance measurement with lithium niobate electro-optic comb.

ABSTRACT: AI-empowered autonomous vehicles must sense the fast-changing three-dimensional environments with high speed and precision. However, the tradeoff between acquisition rate and non-ambiguity range prevents most LiDARs from achieving high-speed absolute distance measurement. Here we demonstrate a lithium niobate electro-optic comb-enabled ultrafast absolute distance measurement method - repetition rate-modulated frequency comb (RRMFC). We achieved an integrated lithium-niobate phase modulator with a half-wave voltage of 1.47 V, leading to over 50 sidebands and a repetition rate can be tuned over 12 GHz in 4 μs. Leveraging these unique features, RRMFC can coherently measure the distance by detecting interference peaks in the time domain, leading to acquisition rates up to 1.79 GHz and a large

SUBMITTER: Qi Y 

PROVIDER: S-EPMC11937509 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature