This leads to the phenomenon called population inversion, which forms the basis of lasing action of lasers.
12.
Fundamentally, these gases act as a pumping medium to ensure that the necessary population inversion is attained.
13.
The refocusing allows all the proton chemical shifts to undergo population inversion in the SPI step without its undesirable selectivity.
14.
The population inversion in the laser is achieved by the following sequence : electron impact excites vibrational motion of the nitrogen.
15.
The THz stimulated phonon induced transitions between the electron superlattice states lead to this coherent amplification while processing a population inversion.
16.
In order to fire a laser, the active gain medium must be in a nonthermal energy distribution known as a population inversion.
17.
For continuous wave operation it is required for the population inversion of the gain medium to be continually replenished by a steady pump source.
18.
This technique, known as lasing without inversion, allows optical amplification to take place without producing a population inversion between the two states.
19.
When a population inversion ( \ Delta N > 0 ) is present, therefore, optical amplification of incident radiation will take place.
20.
The resulting hot helium atoms must be cooled in order to sustain the ability to produce a population inversion in the carbon dioxide molecules.
