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After 20 years, scientists finally shrink a powerful laser onto a chip

After 20 years, scientists finally shrink a powerful laser onto a chip - Date: - June 4, 2026 - Source: - Ecole Polytechnique Fédérale de Lausanne - Summary: - Researchers at EPFL have developed a chip-scale ultrafast laser that performs on par with traditional tabletop femtosecond lasers. The innovation could make advanced laser technologies far smaller, cheaper, and more accessible for applications ranging from medical diagnostics to atomic clocks. - Share: For decades, ultrafast lasers...

Science Daily 5d ago

Experimental validation of a fast control-oriented, physics-informed surrogate model for plasma equilibrium reconstruction in the TCV tokamak

arXiv:2606.09487v1 Announce Type: new Abstract: Magnetic equilibrium reconstruction provides the plasma state estimate required for real-time shape control in tokamaks. We present a fast, physics-informed neural network surrogate of the \texttt{liuqe} equilibrium reconstruction code \cite{liuqe1} for the TCV tokamak at EPFL, achieving inference times below 100~$\bm\mu$s and enabling 10~kHz shape control. The model is trained on around 10,000 TCV discharges spanning the full operational range...

arXiv Physics 1d ago

Hidden geometry explains why kernel methods separate complex data so well

Hidden geometry explains why kernel methods separate complex data so well Lisa Lock Scientific Editor Robert Egan Associate Editor Are two sets of data genuinely different, or is it because of randomness? This question, known as the two-sample testing problem, becomes notoriously difficult in modern datasets, because they are often high-dimensional, complex, and differences between them can take countless subtle forms. "Simply put, we don't know what differences to look for, the...

Phys.org 1d ago

Ultrafast laser shrinks to chip scale, potentially lowering costs for diagnostics and atomic clocks

Ultrafast laser shrinks to chip scale, potentially lowering costs for diagnostics and atomic clocks Stephanie Baum Scientific Editor Robert Egan Associate Editor Ultrafast lasers emit pulses lasting only a few hundred femtoseconds (quadrillionths of a second). These flashes of light power applications from precision micromachining to eye surgery to optical frequency combs, the Nobel Prize-winning technology behind today's most precise optical atomic clocks. Yet despite more than two decades...

Phys.org 6d ago

Synthesized peptides can slip into cells to block hard-to-target protein interactions

Synthesized peptides can slip into cells to block hard-to-target protein interactions Sadie Harley Scientific Editor Robert Egan Associate Editor Many diseases are driven by proteins interacting with each other inside cells. But blocking these interactions with drugs is difficult because typical "small-molecule" drugs often prove to be too small to grip the broad, flat surfaces involved in protein-protein interactions. On the other hand, peptides—short chains of amino acids—can cover larger...

Phys.org 8d ago

Magnon momentum microscopy: A new window into nanoscale spin-wave physics

Magnon momentum microscopy: A new window into nanoscale spin-wave physics Sadie Harley Scientific Editor Robert Egan Associate Editor An international team led by the Max Born Institute has developed a new type of momentum microscopy to image magnons—the quanta of collectively excited spins—directly in two-dimensional reciprocal space using soft X-rays. Owing to its remarkable sensitivity, simplicity, and access to nanometer-scale wavelengths, this novel technique establishes a powerful and...

Phys.org 1d ago