Scientists have created a new laser for use in laser rangefinders and lidars. This was reported by the press service of the Federal Polytechnic School of Lausanne.
The laser is based on lithium niobate, which is often used in optical modulators to control the frequency or intensity of light passing through the device. This material has a high “Pockels coefficient”, which means it can change its optical properties when exposed to an electric field. It is this feature that allows you to control the laser using a control voltage.
The authors made integrated circuits (photonic integrated circuits) for light based on silicon nitride and connected them to lithium niobate plates. The result is a laser with low frequency noise (a measure of how stable the frequency is) as well as the ability to quickly tune wavelength. The transmitter can change the wavelength with a petahertz frequency. Both of these qualities make a good basis for lidar, a laser-based “radar” that can measure distance to objects and scan their shape. These properties were confirmed during an experiment on the measuring range using the constructed device.
ancient scientists perceivedThat a special part of the brain is activated while walking.