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How Do They Work? Lasers produce highly coherent, directional beams of monochromatic light. The basic structure of any laser is based on an active medium (either a gas or semiconductor) contained between multiple reflectors.
11 gru 2023 · Imagine harnessing a beam of light powerful enough to cut through steel or perform delicate surgeries. This article delves into the fascinating world of laser technology, exploring the core components and principles that make lasers possible.
Laser Beams. Author: the photonics expert Dr. Rüdiger Paschotta. Definition: light beams propagating dominantly in one direction. More general term: light beams. More specific terms: collimated beams, Gaussian beams, diffraction-limited beams, flat-top beams. Categories: general optics, laser devices and laser physics.
The output of the laser is exactly the part of the beam transmitted by the output coupler. In an ideal laser, all the photons in the output beam are identical, resulting in perfect directionality and monochromaticity. This determines the unique coherence and brightness of a laser source.
In optics and particularly in laser physics, laser beams often occur in the form of Gaussian beams, which are named after the mathematician and physicist Johann Carl Friedrich Gauß. The definition of Gaussian beams concerns both the intensity and phase profile, as explained in the following:
A laser beam shape is typically defined by its irradiance distribution and phase. The latter is essential in determining the uniformity of a beam profile over its propagation distance.
Definition: devices generating visible or invisible light, based on stimulated emission of light. More general term: light sources.
