laser1
... • A state in which a substance has been energized, or excited to specific energy levels. • More atoms or molecules are in a higher excited state. • The process of producing a population inversion is called pumping. • Examples: →by lamps of appropriate intensity →by electrical discharge ...
... • A state in which a substance has been energized, or excited to specific energy levels. • More atoms or molecules are in a higher excited state. • The process of producing a population inversion is called pumping. • Examples: →by lamps of appropriate intensity →by electrical discharge ...
N 2
... emit a photon via stimulated emission, the collection of real atoms will be a net absorber, not a net emitter, and amplification will not be possible. Achieving population inversion in a two-level atom is not very practical. Such a task would require a very strong pumping transition that would send ...
... emit a photon via stimulated emission, the collection of real atoms will be a net absorber, not a net emitter, and amplification will not be possible. Achieving population inversion in a two-level atom is not very practical. Such a task would require a very strong pumping transition that would send ...
1 Hydrogen Atom: Wave Function Hydrogen Atom
... continuing this process of stimulated emission and amplification. ...
... continuing this process of stimulated emission and amplification. ...
LASER IN Medicine
... atoms to the metastable level and hold them there long enough for them to store energy, thereby allowing the production of great numbers of stimulated photons. To do this, we pump atoms into the metastable level at a rate that exceeds the rate at which they leave. A large number of atoms are therefo ...
... atoms to the metastable level and hold them there long enough for them to store energy, thereby allowing the production of great numbers of stimulated photons. To do this, we pump atoms into the metastable level at a rate that exceeds the rate at which they leave. A large number of atoms are therefo ...