Spatial coherence means that there is a well-defined beam with well-defined phase across it. For many lasers, the divergence of the laser beam is as low as 1–2 times the diffraction limit ...

Achieving practical interstellar travel requires overcoming the immense challenge of reaching extraordinary velocities. To ...

Another benefit is the higher power output. Multimode laser diodes are able to generate higher optical power, making them ...

Scientists from China have developed high-performance colloidal quantum-dot (CQD)  surface-emitting laser array based on ...

By combining the National Ignition Facility (NIF) laser and ultra-light metal foams, researchers at Lawrence Livermore ...

Here the authors demonstrate the generation of multi-MeV protons at 5 Hz, with low (degree-level) proton beam divergence from a laser pulse focused onto a water sheet target, potentially ...

depending on the transmitted laser beam divergence, the FOV of the receiving telescope and the angle between the axes of the laser beam and telescope. The processed data are already corrected for this ...

The far-field pattern and its intensity profile during laser oscillation (Fig. 3 (c), (d)) show that the oscillation was achieved with an extremely narrow beam divergence angle (of as low as 0.05°), ...

When patterned as diffractive lenses, LCPGs can provide non-mechanical control over beam divergence and variable focusing. These dynamic elements enable a range of applications, such as machine vision ...