maser, device that produces and amplifies electromagnetic radiation mainly in the microwave region of the spectrum. (britannica.com)
and stimulated emission, when a system by means of external influences is stimulated to emit radiation. (nobelprize.org)
This led to the maser (Microwave Amplification by Stimulated Emission of Radiation), first designed by Townes and his co-workers in the USA and which at the same time had been suggested by Basov and Prokhorov in the USSR. (nobelprize.org)
However, it was primarily the work by Schawlow and Townes which initiated the whole dynamic field which we now associate with the concept of "laser" (Light Amplification by Stimulated Emission of Radiation). (nobelprize.org)
Check out the lecture on the Light Amplified by Stimulated Emission of Radiation from week two: 2010 Fall Lecture 5.1 - The Laser Turns 50 from Science in the News on Vimeo. (scienceblogs.com)
So the whole acronym is Light Amplification by Stimulated Emission of Radiation, which sounds like you're doing something really dirty, and really it's not. (astronomycast.com)
A maser is the microwave equivalent of a laser (light amplification by stimulated emission of radiation). (sciencealert.com)
Today, the self-evidently used acronym LASER stands for exactly this phenomenon: Light Amplification by Stimulated Emission of Radiation. (laserlines.co.uk)
The signals from Telstar were received and amplified by a low-noise "maser" (Microwave Amplification by Stimulated Emission of Radiation), the predecessor of the modern laser. (forumastronautico.it)
LASER Full Form is a device that induces the emission of light at specific wavelengths from atoms or molecules and amplifies that light, usually creating a very narrow beam of radiation. (extramarks.com)
In physics, this process is called "light amplification by stimulated emission of radiation"= LASER. (dyndns.org)
A collection of atoms stimulating one another to emit radiation behaves much like an antenna. (mappingignorance.org)
The stimulated emission from some atoms therefore leads to a chain reaction, as more and more atoms give up some of their internal energy to the energy of the radiation. (mappingignorance.org)
Namely, the abbreviation 'laser' stands for "Light Amplification by Stimulated Emission of Radiation", thus, now you are aware of what the word truly represents the term should be self-explanatory. (galeon.com)
A laser (not only handgun lasers, but lasers in general) is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. (sw-guru.com)
Masers (short for Microwave Amplification by Stimulated Emission of Radiation) are much like lasers in that they are concentrated beams of energy. (pcworld.com)
The laser beam is generated by amplifying light through stimulated emission of radiation (LASER). (jqlaser.com)
The process for doing so is called stimulated emission of radiation. (mpg.de)
Albert Einstein proposed the concept of stimulated emission of radiation in 1917. (medscape.com)
Amplification2
What we're talking about is a process by which light is amplified, so laser is a light amplification process, which means you start with one photon and you end up with a whole lot more than that one. (astronomycast.com)
The amplification of the stimulated emission light is done by a laser resonator, which is usually composed of two mirrors at the beginning and the end of the cavity. (laseir.com)
Spontaneous emission6
Spontaneous Emission - After a certain while the photon is emitted in any direction. (h2g2.com)
In contrast to the spontaneous emission, the emission is now governed by the incoming trigger photons, and the emitted photon will have exactly the same direction, energy and phase (because the releasing and the triggering occur in a synchronized way) as the incoming trigger photon. (h2g2.com)
Right after the medium is excited for the first time, spontaneous emission will take place: photons are generated and they will fly away in any direction. (h2g2.com)
The spontaneous emission of electrons between atomic energy levels occurs in different wavelengths with no correlation between each component. (laseir.com)
However, when the cavity is made sufficiently small and highly reflective, the theory of quantum electrodynamics (QED) describes how the cavity can also amplify the spontaneous emission of atoms. (lu.se)
This effect is called Purcell enhancement and can amplify the spontaneous emission of up to four orders of magnitude in rare-earth materials, for realistic cavities. (lu.se)
Lasers that stimulate biological function have an output below 10 milliwatts (one-hundredth of a watt). (livingwellnewyork.com)
Optical cavities, such as the Fabry-Perot cavity, are among other things known for its use in lasers to amplify the stimulated emission from atoms. (lu.se)
Atoms5
Gain saturation occurs when the input signals across the entire gain spectrum are strong enough to produce stimulated emission from all the excited erbium atoms in the fiber. (laserfocusworld.com)
The laws of quantum physics, which restrict atoms and molecules to possessing finite amounts of stored energy that depend on the type of atom or molecule, shape LASER Full Form emission. (extramarks.com)
Usually atoms emit their energy spontaneously long before another photon comes along to stimulate them. (mappingignorance.org)
For stimulated emission to occur, more atoms must exist in the excited state than in the ground state, a situation known as a population inversion. (medscape.com)
These photons become amplified by collisions with excited atoms in the lasing medium that then release photons in exactly the same direction, phase, and wavelength. (medscape.com)
Wavelengths4
The process is not particular about the wavelengths being amplified, as long as they fall within the erbium gain band so they can stimulate emission. (laserfocusworld.com)
Rather than emitting visible light, a maser emits microwave and radio wavelengths that are stimulated and amplified. (sciencealert.com)
When the data came in from the first night of a survey planned for 3,000 hours, Glowacki and team found the signature of a very specific type of megamaser, bright in wavelengths amplified by stimulated hydroxyl molecules, consisting of one hydrogen atom and one oxygen atom. (sciencealert.com)
Typically, only a very small spectrum of visible, infrared, or ultraviolet wavelengths are covered by the emission. (extramarks.com)
Light is amplified1
When light enters from outside the semiconductor, the light is amplified by stimulated emission. (optical-sintai.com)
Photon3
If an atom in the higher state falls down to the lower state by the emission of a photon (light quantum), this photon may stimulate another atom to emit a photon of the same kind, etc. (nobelprize.org)
Stimulated Emission - Another photon coming from somewhere else can trigger an excited molecule to relax and emit the excitation photon. (h2g2.com)
In the stimulated emission, initially, the electron is in a high energy level and then goes to a level with a lower energy due to the interaction with a photon. (laseir.com)
Raman2
Changing channel count and distribution also can affect nonlinear effects in amplifiers, such as the transfer of optical power between channels via stimulated Raman scattering. (laserfocusworld.com)
A Raman amplifier is an optical amplifier based on Raman gain, which results from the effect of stimulated Raman scattering. (optical-sintai.com)
19171
The answer begins with Albert Einstein who first defined the principle of stimulated emission in 1917. (laserlines.co.uk)
Photons2
If, however, there are other photons of the appropriate frequency ( f = Δ E/h ) in the vicinity, the atom may be stimulated to emit its energy. (mappingignorance.org)
A laser amplifies light by generating many identical copies of photons - cloning the photons, as it were. (mpg.de)
Fluorescence1
Materials can be analysed or designed to have a good absorption yield, a small radiationless relaxation rate, and a high fluorescence rate (which is the spontaneous and the stimulated emissions together). (h2g2.com)
Microwave2
In the early 1950s, scientists in both the USA and the Soviet Union were at work in trying to make use of the stimulated emission of atomic systems in order to amplify weak microwave signals and to design oscillators based on such systems. (nobelprize.org)
The masing process needs a hard crystal, such as a ruby, to amplify the microwave energy. (pcworld.com)
Electromagnetic1
In the wave model of light, you can think of the emission simply increasing the amplitude of the oscillations of the existing electromagnetic field within which the emitting atom finds itself. (mappingignorance.org)
Absorption2
For lasing to occur, the gain of the active medium must be larger than the total loss, which includes both unwanted effects such as absorption, emission in directions other than the beam path, and the intentional release of energy through the output coupler. (wikipedia.org)
Taking a closer look at how light absorption takes place makes the concept of emission more understandable. (h2g2.com)
Beam2
To put it shortly - making the beam of light small and amplified. (sw-guru.com)
The partially reflective mirror at one end has an aperture through which the amplified light exits as a laser beam. (medscape.com)
Signals1
Nobel laureate George Smoot claims LIGO has observed amplified signals of black hole mergers from the very distant universe, but LIGO scientists disagree . (typepad.com)
Coherent light1
The Erchonia laser maintains this classification through a unique and patented process which produces the emission of coherent light, generated at a precise and stable frequency and in a focused direction. (livingwellnewyork.com)
Processes1
In these processes the incident proton is converted into a neutron via pion emission. (lu.se)
Electrons1
In a spaser, it is the waves of electrons that are amplified, which are then converted to light. (ieee.org)
Process1
The amazing properties of the laser come from the process of stimulated emission. (laseir.com)
Amplifier1
An SOA (Semiconductor Optical Amplifier) is a semiconductor element that amplifies light. (optical-sintai.com)
Generate2
The idea was to build a device that operates similarly to a laser to generate and amplify surface plasmons. (ieee.org)
This kind of emission is used to generate laser light. (h2g2.com)
Atom1
Light that illuminates the group is more likely to be absorbed than to stimulate any emission, since it is more likely to encounter an atom in the ground state than in the appropriate excited state. (mappingignorance.org)
In a laser, light reflects back and forth through a special material called a gain medium, stimulating the emission of more light of the same phase with each pass. (ieee.org)
The plasmons are amplified by their interaction with the dye-filled shell, which acts as the gain medium, and laser light emerges. (ieee.org)
This stimulated emission is triggered by supplying energy to an ideally light amplifying material (the so-called laser-active material or medium) and thus bring it to a higher energy level (an energetically excited state). (laserlines.co.uk)
In a typical laser, light-or more often electrical current- is pumped into a material called a gain medium that's designed to amplify the signal. (umich.edu)
OPTICAL3
In static gain equalization, a fixed optical filter attenuates the optical channels that are amplified most strongly, giving a smooth overall gain curve. (laserfocusworld.com)
SOAs are included in the optical transceiver modules used for communication between data centers to amplify the optical signal in the 1.3 um band used for Ethernet communication in order to compensate for transmission loss. (optical-sintai.com)
As a consequence, our analysis of leading neutron data has put limits on the magnitude of the nonperturbative absorptive corrections and on the models of the pion flux (which describes the pion emission by the incident proton). (lu.se)
Energy1
Cold Laser Therapy (CLT) is the application of a low-energy or low-level laser to tissue in order to stimulate cellular metabolism and enhance biochemical functioning. (livingwellnewyork.com)
Frequency1
In that case, light of the appropriate frequency is more likely to stimulate emission than to be absorbed. (mappingignorance.org)
This is the concept of stimulated emission used in the creation of a laser. (medscape.com)
Power1
Other characteristics that affect laser performance include the power output and the mode of emission (eg, continuous wave, pulsed, or Q-switched). (medscape.com)
Results1
These results come from the ability of Cold Laser Therapy to "bio-stimulate" tissue growth and repair. (livingwellnewyork.com)