Open AccessDoppler velocimeter and vibrometer FMCW LiDAR with Si photonic crystal beam scanner
Author(s) -
Saneyuki Suyama,
Hiroyuki Ito,
Ryo Kurahashi,
Hiroshi Abe,
Toshihiko Baba
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.438453
Subject(s) - laser doppler vibrometer , optics , doppler effect , lidar , materials science , continuous wave , scanner , laser doppler velocimetry , laser , photonics , laser scanning vibrometry , signal (programming language) , vibration , laser scanning , beam (structure) , ranging , acoustics , physics , laser beams , telecommunications , computer science , medicine , blood flow , astronomy , programming language
In this paper, we propose and demonstrate a frequency-modulated continuous-wave light detection and ranging (LiDAR) with a Si photonic crystal beam scanner, simultaneously enabling scanning laser Doppler measurements. This nonmechanical solid-state device can reduce the size of conventional scanning laser Doppler vibrometers, making LiDAR a multimodal imaging sensor, which can measure the distributions of distance, velocity, and vibration frequency. We fabricated this device using Si photonics process and confirmed the expected operations. Distance and velocity resolutions were less than 15 mm and 19 mm/s, respectively. The detection limit of the vibration amplitude determined by the signal-to-noise ratio was 2.5 nm.