Physicists create unified model for breathing laser pulses

An international research team has developed a single mathematical framework that explains the unusual rhythmic behavior of breather laser pulses. The breakthrough unites two previously separate regimes of laser dynamics for the first time.

Researchers including Dr. Sonia Boscolo of Aston University published their findings in Physical Review Letters. The study shows that both fast and slow breathing cycles in ultrafast lasers arise from related physical processes rather than distinct mechanisms. Above-threshold breathers oscillate rapidly and lock to the cavity, while below-threshold breathers evolve slowly through Q-switching combined with soliton shaping.

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Researchers at EPFL have created the first chip-scale ultrafast laser that matches the performance of traditional tabletop femtosecond lasers. The device delivers pulses as short as 147 femtoseconds with energies of 1.05 nanojoules.

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Researchers at MIT have discovered that chaotic laser light can self-organize into a highly focused pencil beam, enabling 3D imaging of the blood-brain barrier 25 times faster than current methods. The technique allows real-time observation of drugs entering brain cells without fluorescent tags. This breakthrough could speed up development of treatments for neurological diseases like Alzheimer's and ALS.

A new device using a laser-held bead has enabled the first direct measurement of pressure exerted by individual particles. Developed by researchers at Yale University, the tool could advance studies in extreme vacuums and help search for elusive particles like sterile neutrinos.

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Researchers at the University of Chicago have developed a straightforward method to produce complex entangled quantum states using basic adjustments in optical cavity systems. The approach relies on existing laboratory tools and could advance quantum sensing applications. Their findings appear in a recent issue of Physical Review X.

 

 

 

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