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Slow-Light Waveguide Provides Beam-Steering Capabilities for Lidar

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YOKOHAMA, Japan, Jan. 21, 2020 — In the field of lidar, where speed is often valued above other variables, a team from Yokohama National University is using “slow light” to develop compact, easy-to-use, 3D sensors with nonmechanical beam-steering capabilities. “Currently existing optical beam-steering devices all use some kind of mechanics, such as rotary mirrors,” professor Toshihiko Baba said. “This makes the device large and heavy, with limited overall speed and a high cost.” Optical phased arrays can be used to direct the optical beam without mechanical parts, but this approach...Read full article

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    Published: January 2020
    Glossary
    lidar
    Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and generate precise, three-dimensional information about the shape and characteristics of objects and surfaces. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit (IMU), all integrated into a single system. Here is how lidar works: Laser emission: A laser emits laser pulses, often in the form of rapid and repetitive laser...
    photonic crystals
    Photonic crystals are artificial structures or materials designed to manipulate and control the flow of light in a manner analogous to how semiconductors control the flow of electrons. Photonic crystals are often engineered to have periodic variations in their refractive index, leading to bandgaps that prevent certain wavelengths of light from propagating through the material. These bandgaps are similar in principle to electronic bandgaps in semiconductors. Here are some key points about...
    Research & TechnologyeducationAsia-PacificImagingLasersLight SourcesOpticsSensors & DetectorsPrismslidarslow lightphotonic crystalswaveguidesbeam steeringautomotiveaerospaceindustrial

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