Physics · Laser Physics
Consider the energy level diagram of a three-level laser system. The atoms are pumped from the ground state (g) to the upper state (u) at a rate of 1021 atoms/cm3·s. The lifetimes of the upper state (u) and the metastable state (m) are τum = 7 ns and τmg = 1 ms, respectively. Under steady-state equilibrium conditions, the population in the metastable state (m) is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11019 atoms/cm3
- 21018 atoms/cm3✓
- 31017 atoms/cm3
- 41016 atoms/cm3
Correct answer
1018 atoms/cm3
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