Researchers from Harvard and the Technical University of Vienna have developed an innovative tunable semiconductor laser that enhances the precision and versatility of light emissions while reducing size and cost. This new design features multiple tiny ring-shaped lasers, each emitting different wavelengths, which are seamlessly integrated into a single chip. By adjusting the electric current, the laser can smoothly transition between wavelengths without sacrificing stability or requiring complex moving parts.

This advancement has significant implications across various fields, including telecommunications, medical diagnostics, and gas sensing. The unique architecture minimizes issues like optical feedback, ensuring reliable performance in diverse environments. The team aims to commercialize this technology, potentially replacing existing tunable lasers that currently face limitations in accuracy or range.
Read the complete article of Harvard here.

Picture: Joshua Mornhinweg