Technologies / Materials
Light detection and Ranging (LiDAR) sensors enable advanced driver assistance systems (ADAS) in both existing applications, such as emergency braking and adaptive cruise control, and the rapidly growing market for highly autonomous vehicles. II-VI is your partner to enable LiDAR sensors, with a broad portfolio of components that include laser diodes, fiber amplifiers as light sources, optical filters for detection and environmental hardening, mirrors for scanning, and thermoelectric coolers for temperature control. High power infrared laser sources are the engines of high performance LiDAR sensors. II-VI is a global leader in semiconductor laser diodes. Our product offering includes edge emitters and VCSELs in the 0.8 to 1 μm wavelength range that are capable of providing high peak powers for direct illumination and imaging, as required for automotive applications. Our unique ultra-low angle shift filters are used to isolate the reflected laser light and optimize the signal to noise ratio of LiDAR sensors. For emission and return windows on LiDAR systems, II-VI designs and manufactures ultra-hard bulk materials and coatings such as silicon carbide (SiC) and diamond, water-shedding (hydrophobic) and oil resistant (oleophobic) layers. Active coatings such as indium tin oxide (ITO) can be deposited in complex patterns for thermally controlling windows or for monitoring light leakage from a physically damaged sensor. Beam steering using polygon scanners or galvanometric mirrors has been used in LiDAR sensors for decades. They are the preferred solution for many systems in autonomous vehicles due to their simplicity. II-VI offers various types of polygon scanning mirrors, including prismatic, pyramidal, and irregular polygons and galvanometric mirrors with unmatched performance and weight characteristics. Our polygon mirrors are produced using diamond machining achieving the highest precision as required for compact scanning LiDAR sensors. Thermoelectric coolers are often needed in LiDAR sensors to control operation over the wide temperature range required for automotive. Our thermoelectric coolers are qualified to automotive standards and enable LiDAR systems to operate with higher efficiency, reach operating temperatures faster and extend device lifetime.