A flashlamp pumps one third of the atoms of a two-level system into the excited state....

A flashlamp pumps one third of the atoms of a two-level system into the excited state.

a. Will it lase?

b. If the same flashlamp pumps a three-level system with the same saturation intensity, what fraction of the atoms will be excited into level 2?

c. Will it lase?

d. What about a four-level system?

e. Which of these systems will lase if the pump intensity is much larger than the saturation intensity?

Expert Solution

genius_generous answered 2 years ago

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