Laser - Wikipedia
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser originated as an acronym for light amplification by stimulated emission of radiation.
Laser | Definition, Acronym, Principle, Applications, & Types ...
2024年12月13日 · Laser is an acronym for “light amplification by the stimulated emission of radiation.” 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.
What Are Lasers And How Do They Actually Work? - ScienceAlert
Lasers are devices that concentrate beams of light by forcing their waveforms and frequencies to align. First developed in the 1960s to amplify microwaves, modern lasers technology can ramp up light rays in just about any part of the electromagnetic spectrum, with …
How Lasers Work - HowStuffWorks
2023年7月31日 · What makes a laser beam different from the beam of a flashlight? Specifically, what makes a laser light different from other kinds of light? How are lasers classified? In this article, you'll learn all about the different types of lasers, their different wavelengths and the uses to which we put them (like laser pointers).
How do lasers work? | Who invented the laser?
2024年11月28日 · Lasers are amazing light beams powerful enough to zoom miles into the sky or cut through lumps of metal. Although they seem pretty recent inventions, they've actually been with us over half a century: the theory was figured out …
What Is a Laser? | NASA Space Place – NASA Science for Kids
2024年12月5日 · Lasers produce a very narrow beam of light. This type of light is useful for lots of technologies and instruments—even some that you might use at home! How does a laser work? Light travels in waves, and the distance between the peaks of a wave is called the wavelength. Each color of light has a different wavelength.
Lasers: Understanding the Basics - Photonics
In a laser diode, current flow creates charge carriers (electrons and holes) in a p-n junction. These combine and emit light through stimulated emission. Laser diodes are available as single emitters with powers up to tens of watts, and as monolithic linear bars with numerous individual emitters.
Lasers – principle of operation, properties of laser light ...
What special properties does laser light have? What types of devices are included under the term “laser”? What is the basic principle of operation of any laser? What enables lasers to form very directed beams with low divergence? What factors allow …
What Is A Laser? | NIST - National Institute of Standards and ...
2010年5月19日 · Laser light travels through an optical fiber, built at NIST, possessing a special microscopic structure that helps produce large yields of paired light particles that may be suitable for future quantum communications.