麻豆淫院

Laser technology is used in many areas, where precise measurements are required and in communication. This means that they are important for everything from self-driving cars to the fiber optic internet and for detecting gases in the air.

Now, a research group has come up with a new type of laser that solves several problems associated with current-day lasers. The group is led by Associate Professor Johann Riemensberger at NTNU's Department of Electronic Systems.

"Our results can give us a new type of laser that is both fast, relatively cheap, powerful and easy to use," says Riemensberger.

The work is a collaboration between NTNU and the Swiss 脡cole Polytechnique F茅d茅rale de Lausanne (EPFL) and Luxtelligence SA. The work is in the journal Nature Photonics.

Self-driving cars and air quality detectors

Conventional precision lasers can be large, expensive, and difficult to adjust.

"Our new laser solves several of these problems," says Riemensberger.

This means that this laser could be used in self-driving cars, for example. These cars use an optical remote sensing technique called Lidar to detect and judge the distance to objects in their surroundings.

The technique measures time differences or changes in the wave phase between the light emitted from the laser and what is reflected back. This laser measures with high precision, around four centimeters.

The researchers also got good results when they used the laser to detect hydrogen cyanide gas in the air. This is a chemical compound that we often call "hydrocyanic acid." It is highly toxic in small doses, so it can be important to detect it quickly.

Advanced materials, microscopic circuits

The researchers created the new laser with advanced materials and microscopic light circuits.

The laser emits a powerful and stable beam of light. Among the other advantages offered by the laser is that users can easily adjust the frequency quickly and smoothly, without sudden jumps.

"You can also easily control it with just one control instead of many," Riemensberger points out.

The laser is built using chip technology that is already available. This makes it possible to mass-produce it cheaply.

"Our findings make it possible to create small, inexpensive and user-friendly measuring instruments and communication tools with high performance," Riemensberger said.