Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level. The liberated energy transfers to the electromagnetic field, creating a new photon with identical phase, frequency, polarization, and direction of travel as the photons of the incident wave. This is in contrast to spontaneous emission which occurs at random intervals without regard to the ambient electromagnetic field. Further calculation can be obtained by statistical mechanics
However, the process is identical in form to atomic absorption in which the energy of an absorbed photon causes an identical but opposite atomic transition: from the lower level to a higher energy level. In normal media at thermal equilibrium, absorption exceeds stimulated emission because there are more electrons in the lower energy states than in the higher energy states. However, when a population inversion is present the rate of stimulated emission exceeds that of absorption, and the net optical amplification can be achieved. Such a gain medium, along with an optical resonator, is at the heart of a laser or maser.
Lacking a feedback mechanism, laser amplifiers and superluminescent sources also function on the basis of stimulated emission.
137 - Stimulate Emission
In this video Paul Andersen explains how stimulated emission can be used to create coherent light. When an atom absorbs a photon it moves to a higher energy level through stimulated absorption. It may then release a photon and moves to a lower energy level through spontaneous emission. However a stimulated atom at a high energy level may release to identical photons that travel coherently. An example of stimulated emission can be found in a laser.
Do you speak another language? Help me translate my videos:
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Title: String Theory
Artist: Herman Jolly
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All of the images are licensed under creative commons and public domain licensing:
“Laser.” Wiki...
published: 15 Aug 2015
Stimulated Emission Explained
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If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
In this video I describe the process of stimulated emission, and how it is mathematically the 'dual' process of absorption. I discuss how this relates to the absorption coefficient, and how we can have stimulated emission and absorption happening at the same time, depending on the number of electrons in each state.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley...
published: 26 May 2019
Stimulated Emission of Radiation
Stimulated Emission of Radiation
published: 06 Sep 2020
Stimulated Emission in Lasers - A Level Physics
This video explains stimulated emission in lasers for A Level Physics
To understand how lasers work we need to look at the three processes that occur within an atom when it interacts with a photon: absorption, spontaneous emission and stimulated emission.
I used this as a reference: http://www.wjec.co.uk/qualifications/science/as-a-level/physics-as-a-level-2015/Lasers%20notes.pdf?language_id=1
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards:
Eduqas
WJEC
_____________________________________
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Find even more videos organised by exam board and topic at:
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published: 06 Nov 2017
Stimulated Emission
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When an atom in an excited state jumps to a lower energy state under the influence of a photon,it emits an additional photon of same frequency of incident photon.This emission is known as stimulated emission.
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How LASERs work! (Animation with Einstein)
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The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses electrons just like any other atom in our world and a photon, that is: a quantum of light.
Contents
1) Energy levels of atoms and electrons
2) Absorbing energy in the form of photons
3) Stimulated and spontaneous emission
4) Photons with same phase, frequency, polarization, direction
5) Parts of a LASER device (reflectors, gain medium)
6) Chain reaction for coherent and monochromatic light
7) Population inversion (ground state vs. excited state)
published: 26 Mar 2014
Spontaneous and Stimulated Emission - Laser in Physics - Physics 2
Subject - Physics 2
Video Name - Spontaneous and Stimulated Emission
Chapter - Laser in Physics
Faculty - Prof. Jyoti Nimbhorkar
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Laser Physics - Stimulated Emission & Einstein Coefficients | Three Level Laser
What is the Physics behind light amplification via lasers? Lasers are synonymous with technology, but is based on a simple concept of Physics called Stimulated Emission.
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𓏬𓏬𓏬𓏬𓏬VIDEO DESCRIPTION𓏬𓏬𓏬𓏬𓏬𓏬
Lasers are devices that produce highly focused and coherent beams of light through a process known as stimulated emission. In stimulated emission, an atom in an excited state em...
published: 14 Dec 2023
Stimulated emission
In this channel of YouTube are edited videos for high school students as well as for students of physics, chemistry, biology, medicine, pharmacy, agriculture and all branches studying science of physics.
published: 10 Jul 2017
How lasers work - a thorough explanation
Lasers have unique properties - light that is monochromatic, coherent and collimated. But why? and what is the meaning behind he term laser. This video covers are fairly comprehensive explanation of the process of producing a laser beam.
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137 - Stimulate Emission
In this video Paul Andersen explains how stimulated emission can be used to create coherent light. When an atom absorbs a photon it m...
137 - Stimulate Emission
In this video Paul Andersen explains how stimulated emission can be used to create coherent light. When an atom absorbs a photon it moves to a higher energy level through stimulated absorption. It may then release a photon and moves to a lower energy level through spontaneous emission. However a stimulated atom at a high energy level may release to identical photons that travel coherently. An example of stimulated emission can be found in a laser.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
“Laser.” Wikipedia, the Free Encyclopedia, May 16, 2015. http://en.wikipedia.org/w/index.php?title=Laser&oldid=662529772.
“Lasers.” PhET. Accessed May 17, 2015. https://phet.colorado.edu/en/simulation/lasers.
V1adis1av. Stimulated Emission, May 3, 2008. Own work. http://commons.wikimedia.org/wiki/File:Stimulated_Emission.svg.
V1adis1av, Stimulated_Emission svg: Alberoderivative work: English: Stimulated Emission, January 18, 2015. This file was derived from: Stimulated Emission.svg. http://commons.wikimedia.org/wiki/File:Stimulated_Emission_hy.svg.
137 - Stimulate Emission
In this video Paul Andersen explains how stimulated emission can be used to create coherent light. When an atom absorbs a photon it moves to a higher energy level through stimulated absorption. It may then release a photon and moves to a lower energy level through spontaneous emission. However a stimulated atom at a high energy level may release to identical photons that travel coherently. An example of stimulated emission can be found in a laser.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
“Laser.” Wikipedia, the Free Encyclopedia, May 16, 2015. http://en.wikipedia.org/w/index.php?title=Laser&oldid=662529772.
“Lasers.” PhET. Accessed May 17, 2015. https://phet.colorado.edu/en/simulation/lasers.
V1adis1av. Stimulated Emission, May 3, 2008. Own work. http://commons.wikimedia.org/wiki/File:Stimulated_Emission.svg.
V1adis1av, Stimulated_Emission svg: Alberoderivative work: English: Stimulated Emission, January 18, 2015. This file was derived from: Stimulated Emission.svg. http://commons.wikimedia.org/wiki/File:Stimulated_Emission_hy.svg.
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If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming ...
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If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
In this video I describe the process of stimulated emission, and how it is mathematically the 'dual' process of absorption. I discuss how this relates to the absorption coefficient, and how we can have stimulated emission and absorption happening at the same time, depending on the number of electrons in each state.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
https://www.patreon.com/edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
In this video I describe the process of stimulated emission, and how it is mathematically the 'dual' process of absorption. I discuss how this relates to the absorption coefficient, and how we can have stimulated emission and absorption happening at the same time, depending on the number of electrons in each state.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
This video explains stimulated emission in lasers for A Level Physics
To understand how lasers work we need to look at the three processes that occur within an...
This video explains stimulated emission in lasers for A Level Physics
To understand how lasers work we need to look at the three processes that occur within an atom when it interacts with a photon: absorption, spontaneous emission and stimulated emission.
I used this as a reference: http://www.wjec.co.uk/qualifications/science/as-a-level/physics-as-a-level-2015/Lasers%20notes.pdf?language_id=1
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards:
Eduqas
WJEC
_____________________________________
MY PHYSICS WEBSITES
Find even more videos organised by exam board and topic at:
GCSE Physics Online
► https://www.gcsephysicsonline.com
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#lasers #alevelphysics #physicsonline
This video explains stimulated emission in lasers for A Level Physics
To understand how lasers work we need to look at the three processes that occur within an atom when it interacts with a photon: absorption, spontaneous emission and stimulated emission.
I used this as a reference: http://www.wjec.co.uk/qualifications/science/as-a-level/physics-as-a-level-2015/Lasers%20notes.pdf?language_id=1
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards:
Eduqas
WJEC
_____________________________________
MY PHYSICS WEBSITES
Find even more videos organised by exam board and topic at:
GCSE Physics Online
► https://www.gcsephysicsonline.com
A Level Physics Online
► https://www.alevelphysicsonline.com
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Stimulated Emission
When an ato...
Check out us at:http://www.tutorvista.com/content/physics/physics-iv/atoms-and-nuclei/spontaneous-and-stimulated-radiation.php
Stimulated Emission
When an atom in an excited state jumps to a lower energy state under the influence of a photon,it emits an additional photon of same frequency of incident photon.This emission is known as stimulated emission.
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Check out us at:http://www.tutorvista.com/content/physics/physics-iv/atoms-and-nuclei/spontaneous-and-stimulated-radiation.php
Stimulated Emission
When an atom in an excited state jumps to a lower energy state under the influence of a photon,it emits an additional photon of same frequency of incident photon.This emission is known as stimulated emission.
Please like our facebook page
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The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses e...
http://www.bring-knowledge-to-the-world.com/
The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses electrons just like any other atom in our world and a photon, that is: a quantum of light.
Contents
1) Energy levels of atoms and electrons
2) Absorbing energy in the form of photons
3) Stimulated and spontaneous emission
4) Photons with same phase, frequency, polarization, direction
5) Parts of a LASER device (reflectors, gain medium)
6) Chain reaction for coherent and monochromatic light
7) Population inversion (ground state vs. excited state)
http://www.bring-knowledge-to-the-world.com/
The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses electrons just like any other atom in our world and a photon, that is: a quantum of light.
Contents
1) Energy levels of atoms and electrons
2) Absorbing energy in the form of photons
3) Stimulated and spontaneous emission
4) Photons with same phase, frequency, polarization, direction
5) Parts of a LASER device (reflectors, gain medium)
6) Chain reaction for coherent and monochromatic light
7) Population inversion (ground state vs. excited state)
Subject - Physics 2
Video Name - Spontaneous and Stimulated Emission
Chapter - Laser in Physics
Faculty - Prof. Jyoti Nimbhorkar
Upskill and get Placements...
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Video Name - Spontaneous and Stimulated Emission
Chapter - Laser in Physics
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What is the Physics behind light amplification via lasers? Lasers are synonymous with technology, but is based on a simple concept of Physics called Stimulated ...
What is the Physics behind light amplification via lasers? Lasers are synonymous with technology, but is based on a simple concept of Physics called Stimulated Emission.
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𓏬𓏬𓏬𓏬𓏬LEC NOTES - GDRIVE𓏬𓏬𓏬𓏬𓏬
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𓏬𓏬𓏬𓏬𓏬VIDEO DESCRIPTION𓏬𓏬𓏬𓏬𓏬𓏬
Lasers are devices that produce highly focused and coherent beams of light through a process known as stimulated emission. In stimulated emission, an atom in an excited state emits a photon when it encounters another photon of the same frequency, resulting in amplification of light.
Three-level lasers are a type of laser system with three energy levels: ground state, excited state, and metastable state. They utilize population inversion, where more atoms occupy the metastable state than the excited state, to achieve laser action.
Einstein coefficients are mathematical terms used to describe the probability of different processes in the interaction of light with matter. They are named after Albert Einstein, who introduced them to explain the physics of stimulated emission and absorption, which are fundamental principles underlying laser operation.
00:00 Introduction
01:46 Laser Physics - Stimulated Emission
15:30 Three Level Laser
22:15 Einstein Coefficients
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What is the Physics behind light amplification via lasers? Lasers are synonymous with technology, but is based on a simple concept of Physics called Stimulated Emission.
𓏬𓏬𓏬𓏬𓏬ELEVATE CLASSES𓏬𓏬𓏬𓏬𓏬
Browse LIVE & Recorded Courses for Physics IITJAM, CSIR-NET, GATE, TIFR, JEST etc on our platform ► https://www.elevateclasses.in/
Android ► https://bit.ly/3zU71ur
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𓏬𓏬𓏬𓏬𓏬LEC NOTES - GDRIVE𓏬𓏬𓏬𓏬𓏬
Find the PDF Scanned copy of my NOTES for this lecture here:
https://drive.google.com/file/d/1deBwqhJTvPz1gpc0TwRsfBp0ZMwkWEEf/view?usp=drive_link
𓏬𓏬𓏬𓏬𓏬VIDEO DESCRIPTION𓏬𓏬𓏬𓏬𓏬𓏬
Lasers are devices that produce highly focused and coherent beams of light through a process known as stimulated emission. In stimulated emission, an atom in an excited state emits a photon when it encounters another photon of the same frequency, resulting in amplification of light.
Three-level lasers are a type of laser system with three energy levels: ground state, excited state, and metastable state. They utilize population inversion, where more atoms occupy the metastable state than the excited state, to achieve laser action.
Einstein coefficients are mathematical terms used to describe the probability of different processes in the interaction of light with matter. They are named after Albert Einstein, who introduced them to explain the physics of stimulated emission and absorption, which are fundamental principles underlying laser operation.
00:00 Introduction
01:46 Laser Physics - Stimulated Emission
15:30 Three Level Laser
22:15 Einstein Coefficients
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In this channel of YouTube are edited videos for high school students as well as for students of physics, chemistry, biology, medicine, pharmacy, agriculture an...
In this channel of YouTube are edited videos for high school students as well as for students of physics, chemistry, biology, medicine, pharmacy, agriculture and all branches studying science of physics.
In this channel of YouTube are edited videos for high school students as well as for students of physics, chemistry, biology, medicine, pharmacy, agriculture and all branches studying science of physics.
Lasers have unique properties - light that is monochromatic, coherent and collimated. But why? and what is the meaning behind he term laser. This video covers a...
Lasers have unique properties - light that is monochromatic, coherent and collimated. But why? and what is the meaning behind he term laser. This video covers are fairly comprehensive explanation of the process of producing a laser beam.
Subscribe - www.youtube.com/c/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Support my work either regularly at Patreon: www.patreon.com/Physicshigh
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Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
👥 Social
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Follow me on
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#highschoolphysicsexplained #physicshigh
Lasers have unique properties - light that is monochromatic, coherent and collimated. But why? and what is the meaning behind he term laser. This video covers are fairly comprehensive explanation of the process of producing a laser beam.
Subscribe - www.youtube.com/c/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Support my work either regularly at Patreon: www.patreon.com/Physicshigh
OR
a one off payment at PayPal: [email protected]
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
👥 Social
---------------------------------------------------------
Follow me on
facebook: @physicshigh
twitter: @physicshigh
Instagram: @physicshigh
#highschoolphysicsexplained #physicshigh
137 - Stimulate Emission
In this video Paul Andersen explains how stimulated emission can be used to create coherent light. When an atom absorbs a photon it moves to a higher energy level through stimulated absorption. It may then release a photon and moves to a lower energy level through spontaneous emission. However a stimulated atom at a high energy level may release to identical photons that travel coherently. An example of stimulated emission can be found in a laser.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
“Laser.” Wikipedia, the Free Encyclopedia, May 16, 2015. http://en.wikipedia.org/w/index.php?title=Laser&oldid=662529772.
“Lasers.” PhET. Accessed May 17, 2015. https://phet.colorado.edu/en/simulation/lasers.
V1adis1av. Stimulated Emission, May 3, 2008. Own work. http://commons.wikimedia.org/wiki/File:Stimulated_Emission.svg.
V1adis1av, Stimulated_Emission svg: Alberoderivative work: English: Stimulated Emission, January 18, 2015. This file was derived from: Stimulated Emission.svg. http://commons.wikimedia.org/wiki/File:Stimulated_Emission_hy.svg.
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In this video I describe the process of stimulated emission, and how it is mathematically the 'dual' process of absorption. I discuss how this relates to the absorption coefficient, and how we can have stimulated emission and absorption happening at the same time, depending on the number of electrons in each state.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.
This video explains stimulated emission in lasers for A Level Physics
To understand how lasers work we need to look at the three processes that occur within an atom when it interacts with a photon: absorption, spontaneous emission and stimulated emission.
I used this as a reference: http://www.wjec.co.uk/qualifications/science/as-a-level/physics-as-a-level-2015/Lasers%20notes.pdf?language_id=1
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards:
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Stimulated Emission
When an atom in an excited state jumps to a lower energy state under the influence of a photon,it emits an additional photon of same frequency of incident photon.This emission is known as stimulated emission.
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The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses electrons just like any other atom in our world and a photon, that is: a quantum of light.
Contents
1) Energy levels of atoms and electrons
2) Absorbing energy in the form of photons
3) Stimulated and spontaneous emission
4) Photons with same phase, frequency, polarization, direction
5) Parts of a LASER device (reflectors, gain medium)
6) Chain reaction for coherent and monochromatic light
7) Population inversion (ground state vs. excited state)
Subject - Physics 2
Video Name - Spontaneous and Stimulated Emission
Chapter - Laser in Physics
Faculty - Prof. Jyoti Nimbhorkar
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#LaserinPhysics
What is the Physics behind light amplification via lasers? Lasers are synonymous with technology, but is based on a simple concept of Physics called Stimulated Emission.
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Lasers are devices that produce highly focused and coherent beams of light through a process known as stimulated emission. In stimulated emission, an atom in an excited state emits a photon when it encounters another photon of the same frequency, resulting in amplification of light.
Three-level lasers are a type of laser system with three energy levels: ground state, excited state, and metastable state. They utilize population inversion, where more atoms occupy the metastable state than the excited state, to achieve laser action.
Einstein coefficients are mathematical terms used to describe the probability of different processes in the interaction of light with matter. They are named after Albert Einstein, who introduced them to explain the physics of stimulated emission and absorption, which are fundamental principles underlying laser operation.
00:00 Introduction
01:46 Laser Physics - Stimulated Emission
15:30 Three Level Laser
22:15 Einstein Coefficients
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Lasers have unique properties - light that is monochromatic, coherent and collimated. But why? and what is the meaning behind he term laser. This video covers are fairly comprehensive explanation of the process of producing a laser beam.
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Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level. The liberated energy transfers to the electromagnetic field, creating a new photon with identical phase, frequency, polarization, and direction of travel as the photons of the incident wave. This is in contrast to spontaneous emission which occurs at random intervals without regard to the ambient electromagnetic field. Further calculation can be obtained by statistical mechanics
However, the process is identical in form to atomic absorption in which the energy of an absorbed photon causes an identical but opposite atomic transition: from the lower level to a higher energy level. In normal media at thermal equilibrium, absorption exceeds stimulated emission because there are more electrons in the lower energy states than in the higher energy states. However, when a population inversion is present the rate of stimulated emission exceeds that of absorption, and the net optical amplification can be achieved. Such a gain medium, along with an optical resonator, is at the heart of a laser or maser.
Lacking a feedback mechanism, laser amplifiers and superluminescent sources also function on the basis of stimulated emission.