Neblux Knowledge Graph
Laser
A laser is a device that produces light via optical amplification based on the stimulated emission of electromagnetic radiation.
Overview
By utilizing stimulated emission within a gain medium often coupled with an optical resonator, lasers generate light exhibiting spatial or temporal coherence. These characteristics enable low beam divergence, high spectral purity, or concentrated power densities that distinguish them from spontaneous thermal sources. Practical designs span gas discharge tubes, solid-state crystals, semiconductor diodes, and ultrafast pulsed platforms.
Why it matters
Lasers serve as central components in optical fiber communications, precision machining, biomedical instrumentation, and spectroscopy. In laboratory environments, laser methods support microscopic manipulation, atomic cooling, and high-resolution chemical dynamics.
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