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Aug 25, 2024 · Laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. The emission generally covers an extremely limited range of visible, infrared, or ultraviolet wavelengths.
- Fundamental Principles
Laser - Light, Amplification, Coherence: Laser emission is...
- Laser Applications
Laser - Surgery, Communication, Measurement: Lasers deliver...
- History
Laser - Invention, Light Amplification, Coherent Beam: The...
- Optical Pumping
optical pumping, in physics, the use of light energy to...
- Gas Laser
Other articles where gas laser is discussed: laser: History:...
- Fundamental Principles
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What is laser processing?
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
- Spontaneous emission is a random process, whereas stimulated emission produces photons with identical properties. Einstein predicted that excited atoms also could convert stored energy into light by a process called stimulated emission.
- In the prototypical gas laser, the gain medium has a long, thin cylindrical shape. The cavity is defined by two mirrors. One is partially reflecting and allows the output beam to escape.
- Laser light differs from conventional light in that all the lightwaves are in phase with each other. Brightness (or, more correctly, radiance)— The most strikingly visible difference between lasers and conventional light sources is that all the emitted light travels in the same direction as an intense beam.
- A resonant cavity supports only modes that meet the resonance condition, Nλ = 2 × cavity length. The output of a CW laser is defined by the overlap of the gain bandwidth and these resonant cavity modes.
Mar 14, 2016 · In ultrafast laser manufacturing, optical energy of tightly focused femtosecond or picosecond laser pulses can be delivered to precisely defined positions in the bulk of materials via...
- Mangirdas Malinauskas, Albertas Žukauskas, Satoshi Hasegawa, Yoshio Hayasaki, Vygantas Mizeikis, Rič...
- 2016
Jan 13, 2007 · Key Points. 'Laser' is an acronym for 'light amplification by the stimulation emission of radiation'. Its theoretical basis was postulated by Albert Einstein. The first tooth exposed to laser ...
- S. Parker
- thewholetooth@easynet.co.uk
- 2007
Industrial Lasers: An Introduction to Process Qualification. The step from successfully demonstrating a new laser process on a limited number of samples under laboratory conditions, to scaling that process up for high-volume industrial use is a big one.
Sep 7, 2023 · Laser processing involves using a laser beam to alter the surface of a material through thermal effects, including laser welding, laser cutting, surface modification, laser marking, laser drilling, and microprocessing.
