Chalmers develops novel optical amplifier with zero added noise

Researchers at Chalmers University of Technology have developed what they claim is the world's first optical amplifier that significantly enhances signal quality without adding noise. This advancement addresses a decades-old challenge in optical communication, potentially revolutionizing the field.

Optical amplifiers are crucial for transmitting information over long distances, such as in fiber optic cables and space communication. However, traditional amplifiers introduce noise, degrading signal quality. The new Chalmers amplifier, based on the Kerr effect, is integrated into a compact chip just millimeters in size, a significant reduction compared to previous, much larger experimental setups.

"This could be compared to switching from older, dial-up internet to modern broadband, with high speed and quality," said Professor Peter Andrekson, Head of the Photonics Laboratory at Chalmers. The new amplifier operates in continuous wave (CW) mode and its low-noise performance allows for more sparse placement, making it a more cost-effective solution.

The technology holds promise not only for traditional communication but also for emerging applications in quantum computing, sensor systems, and metrology. The research has been published in the journal Science Advances, and Chalmers suggests this represents a significant step towards practical applications across various sectors.