"Swept Source Lidar: simultaneous FMCW ranging and nonmechanical beam steering with a wideband swept source"in Optics Express, Vol. 28 of OSA (The Optical Society)
Light detection and ranging (Lidar*1) has long been used in various applications. Solid-state beam steering mechanisms are needed for robust lidar systems. Here we propose and demonstrate a lidar scheme called “Swept Source Lidar™*2” that allows us to perform frequency-modulated continuous-wave (FMCW) ranging and nonmechanical beam steering simultaneously. Wavelength dispersive elements provide angular beam steering, while a laser frequency is continuously swept by a wideband swept source over its whole tuning bandwidth. Employing a tunable vertical-cavity surface-emitting laser and a 1-axis mechanical beam scanner, three-dimensional point cloud data has been obtained. Swept Source Lidar systems can be flexibly combined with various beam steering elements to realize full solid-state FMCW lidar systems.
*1.Lidar is becoming ubiquitous for distance measurements in various applications, including autonomous driving, robotics, and three-dimensional sensing. In recent years, solid-state lidar systems, which have no moving components, have attracted more attention in industries where robustness and stability are critical.
*2.“Swept Source Lidar™” is a trademark of Santec Corporation.
Masayuki Okano and Changho Chong, "Swept Source Lidar: simultaneous FMCW ranging and nonmechanical beam steering with a wideband swept source," Optics Express, Vol. 28, Issue 16, pp. 23898-23915 (2020).
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