Semiconductor laser's shape modification improves illumination and holography

https://phys.org/news/2023-03-simple-modification-semiconductor-laser-quality.html

"hundreds of vertical-cavity surface emitting lasers (VCSEL) can be created and used on same substrate at same time... uniform light in plane perpendicular to direction of beam propagation reduces speckles in laser... D-shaped devices exhibited substantially reduced coherence and corresponding 60% increase in optical power, which is maximum achievable, enabled by chaotic dynamics of the rays of light within the cavity... lighting, holography, projection and displays"

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