10 Facts About Laser beam

Laser beam is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

Spatial coherence allows a laser beam to stay narrow over great distances, enabling applications such as laser pointers and lidar (light detection and ranging).

Laser beam that produces light by itself is technically an optical oscillator rather than an optical amplifier as suggested by the acronym.

However even such a divergent beam can be transformed into a similarly collimated beam by means of a lens system, as is always included, for instance, in a laser pointer whose light originates from a laser diode.

Laser beam can be classified as operating in either continuous or pulsed mode, depending on whether the power output is essentially continuous over time or whether its output takes the form of pulses of light on one or another time scale.

Laser beam continued developing the idea, and filed a patent application in April 1959.

Laser beam diodes are frequently used to optically pump other lasers with high efficiency.

Laser beam therapy is often combined with other treatments, such as surgery, chemotherapy, or radiation therapy.

Laser beam-induced interstitial thermotherapy, or interstitial laser photocoagulation, uses lasers to treat some cancers using hyperthermia, which uses heat to shrink tumors by damaging or killing cancer cells.

Laser beam weapon is a laser that is used as a directed-energy weapon.