LASERS

Essay specific features

 

Issue:

Science

 

Written by:

Kerrie E

 

Date added:

April 7, 2014

 

Level:

University

 

Grade:

A

 

No of pages / words:

1 / 265

 

Was viewed:

1477 times

 

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Essay content:

Typically, very intense flashes of light or electrical discharges pump the lasing medium and create a large collection of excited-state atoms (atoms with higher energy electrons). It is necessary to have a large collection of atoms in the excited state for the laser to work efficiently. In general, the atoms are excited to a level that is two or three levels above the ground state...
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In general, the atoms are excited to a level that is two or three levels above the ground state. This increases the degree of population inversion. The population inversion is the number of atoms in the excited state versus the ground state. Once the lasing medium is pumped, it contains a collection of atoms with some electrons sitting in excited levels...
displayed 300 characters

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