Homework : Q1 :- Calculate the ratio of spontaneous and stimulated emission light of wavelength ( 590 nm ) at room temperature(300K°), and show that : 1. The equilibrium populations of levels energy of this transition? 2. At what temperature is the rate stimulated emission is equal to the rate spontaneous emission?
Homework : Q1 :- Calculate the ratio of spontaneous and stimulated emission light of wavelength ( 590 nm ) at room temperature(300K°), and show that : 1. The equilibrium populations of levels energy of this transition? 2. At what temperature is the rate stimulated emission is equal to the rate spontaneous emission?
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Transcribed Image Text:Laser
Pr. Hamid Ahmed
Homework:
Q1 :- Calculate the ratio of spontaneous and stimulated emission
light of wavelength ( 590 nm ) at room temperature(300K°), and
show that:
1. The
equilibrium populations of levels energy of this
transition?
2. At what temperature is the rate stimulated emission is
equal to the rate spontaneous emission?
Q2 :- If the intensity of the light passing through is doubled
once through a laser medium of length (0.5 m), Calculate the
Gain Coefficient ?
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