Integrated optical path chips can emit lasers of multiple colors.

Mars Finance News April 22 - Scientists at the National Institute of Standards and Technology (NIST) in the United States have developed a new type of optical path chip, only the size of a fingernail, capable of producing lasers in various colors like a rainbow.
This chip processes light in a manner similar to how traditional chips handle electronics, integrating lasers that emit multiple wavelengths of light into a tiny square.
It becomes a form of optical “integrated circuit,” which is expected to inject new momentum into cutting-edge technologies such as artificial intelligence, quantum computing, and optical atomic clocks.
The related paper was published in the latest issue of Nature. (Science and Technology Daily)