Scientists at the MIT Electronics Research Laboratory have achieved a major breakthrough in silicon photonics. They have developed an optical phased array (OPA) that solves a fundamental problem that has hindered the development of LiDAR systems for decades. The new technology combines a wide field of view with high resolution, allowing for the elimination of image noise. This is reported by Ixbt.com reports .
In traditional systems, when the distance between antennas is too small, light leaks from one waveguide to another (evanescent coupling). To solve this, the MIT team used a geometric 'detuning' method. By using three types of antennas with different widths (550, 600, and 650 nanometers), they managed to completely stop the interaction between adjacent channels.
By precisely optimizing the diffraction gratings, the researchers ensured that all antennas emit light at the same angle and with the same intensity. Tests conducted on the AIM Photonics platform showed a 100-fold reduction in noise levels. The 16-channel chip demonstrated high efficiency by performing active scanning in a 60-degree sector.
This discovery paves the way for the mass production of compact, affordable, and highly reliable LiDAR sensors. In the future, this technology is expected to be integrated into smartphones, autonomous driving systems, and augmented reality (AR) devices. This achievement removes one of the main barriers to the scalable implementation of optical imaging systems.
Read “Zamin” on Telegram!
