MIT scientists turn chaotic laser light into powerful brain imaging tool
MIT scientists discovered that chaotic laser light can self-organize into a focused 'pencil beam' under specific conditions, enabling faster and more detailed imaging of living tissue. This new method allows 3D imaging of the blood-brain barrier at speeds 25 times faster than current techniques while maintaining image quality. It also permits real-time observation of drug uptake in brain cells, potentially accelerating research on neurological diseases.
- ▪Chaotic laser light can spontaneously form a highly focused 'pencil beam' when entering a multimode fiber at a zero-degree angle and at high power levels.
- ▪The self-organized beam enables 3D imaging of the blood-brain barrier 25 times faster than the current gold-standard technique.
- ▪Researchers can now observe in real time how individual brain cells absorb drugs, which may improve the development of treatments for diseases like Alzheimer's and ALS.
- ▪The discovery challenges the common belief that high-power lasers in multimode fibers always result in chaotic light scattering.
- ▪The effect relies on nonlinear interactions between light and the fiber material, which counteract the fiber's intrinsic disorder.
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Science News from research organizations MIT scientists turn chaotic laser light into powerful brain imaging tool Chaotic laser light just learned a new trick—turning itself into a precision beam that could fast-track brain disease research. Date: April 28, 2026 Source: Massachusetts Institute of Technology Summary: Scientists at MIT discovered that chaotic laser light can spontaneously form a highly focused beam instead of scattering—if the conditions are just right. This “pencil beam” enabled them to image the blood-brain barrier in 3D at speeds 25 times faster than existing techniques. The method also lets researchers watch how drugs move into brain cells in real time. It could dramatically accelerate the development of treatments for neurological diseases.
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