# Diamond laser system achieves 100% optical contrast in magnetic-field readout

- Source: Phys.org
- Published: 2026-10-22T18:20:08+00:00
- Category: Science
- Original: https://phys.org/news/2026-10-diamond-laser-optical-contrast-magnetic.html
- Canonical: https://groundlevelnews.com/story/diamond-laser-system-achieves-100-optical-contrast-in-magnetic-field-r-4b0b05/

Researchers at Fraunhofer IAF have developed a laser-enhanced quantum sensor that combines high magnetic-field sensitivity with a large dynamic range. Using laser threshold magnetometry, they improved the ratio of sensitivity and dynamic range by a factor of up to 590 compared with state-of-the-art approaches. The breakthrough is enabled by the first demonstration of 100% optical contrast, combine

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