At a Glance
- Direct frequency modulation at 1550 nm and coherent detection enable longer range, intrinsic amplification and glare suppression
- Reduced system complexity by monostatic design using two-dimensional MEMS Scanner
- Fiber coupling permits spatial separation of optical frontend and receiver module
Technical Background
The three Fraunhofer Institutes HHI, ISIT, FHR demonstrate a LiDAR prototype based on coherent detection. This approach enables long-range operation, simple implementation of glare suppression and potentially a small form factor. It is based on the frequency modulation of an eye-safe laser at a wavelength of 1550 nm that scans the scene using small micro-electro-mechanical-system (MEMS) mirrors.
Features
- Long range of about 150 m
- Simultaneous measurement of distance and speed
- Scalability by using standard communication components
- Quasi-solid-state for scanning
- Fiber-based optics and monostatic scanning design
Applications
- Advanced Driver Assistance Systems (ADAS)
- 3D Imaging
- Augmented Reality (AR)
- Smart Infrastructure
- Robotics
Prototype
- Frequency modulated continuous wave (FMCW) method with passive predistortion
- Laser wavelength at 1550 nm and 100 kHz linewidth
- Eye-safe operation
- Utilizing a novel 2D quasi-static MEMS mirror for point-to-point scanning
