Dead-zone free single-shot three-dimensional measurement using a high-repetition-rate Yb:fiber comb

Using spectral interference from a highly chirped and high-repetition-rate optical frequency comb, a technique for dead-zone free one-shot three-dimensional (3D) imaging was developed. We generated continuously emitted pulse train (dead-zone-free pulse) using a highly chirped pulse from a 750-MHz re...

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Veröffentlicht in:Optics continuum 2022-11, Vol.1 (11), p.2374
Hauptverfasser: Kurata, Shintaro, Ishii, Hirotaka, Terada, Kazuhiro, Morito, Tamaki, Tian, Haochen, Kato, Takashi, Minoshima, Kaoru
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Sprache:eng
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Zusammenfassung:Using spectral interference from a highly chirped and high-repetition-rate optical frequency comb, a technique for dead-zone free one-shot three-dimensional (3D) imaging was developed. We generated continuously emitted pulse train (dead-zone-free pulse) using a highly chirped pulse from a 750-MHz repetition mode-locked Yb fiber comb. The measurement performances of the system were evaluated using an optical spectrum analyzer, and a longitudinal delay length resolution of 31 µm was obtained at arbitrary position for more than 400 mm range. Using an imaging spectrometer capable of multipoint spectroscopy, a delay length resolution of 81 µm was demonstrated. Finally, for a proof-of-concept measurement of 3D imaging, line profiles of three mirrors located in the middle of 200-mm-distance, corresponding to pulse-to-pulse interval, were measured without any scanning with an uncertainty of 0.7 mm. The uncertainty could be further improved by optical alignment and analysis to the level of 10 ∼ 100 µm at arbitrary position over the range not limited to pulse-to-pulse interval.
ISSN:2770-0208
2770-0208
DOI:10.1364/OPTCON.474016