3. For an active medium of length L=10cm and having lasing atoms with cross section area and population inversion o (N2-N1) = 0.1 cm¹, calculate the outgoing photon flux Fout after 3 passes through the medium as shown in the illustration. Assume the initial photon flux is Fo le20 s¹cm2 and the output flux is the sum of the two transmitted fluxes as shown. F(z)= F(0) exp(o(N₂-N₁)z) If the photons have wavelength λ=1.06 um, what is the output power density in watts/cm²? What is power density if wavelength 2-10.6 μm? R=1.0 Fo 30 L=10 cm F₁ F₂ R=0.8 Fout
3. For an active medium of length L=10cm and having lasing atoms with cross section area and population inversion o (N2-N1) = 0.1 cm¹, calculate the outgoing photon flux Fout after 3 passes through the medium as shown in the illustration. Assume the initial photon flux is Fo le20 s¹cm2 and the output flux is the sum of the two transmitted fluxes as shown. F(z)= F(0) exp(o(N₂-N₁)z) If the photons have wavelength λ=1.06 um, what is the output power density in watts/cm²? What is power density if wavelength 2-10.6 μm? R=1.0 Fo 30 L=10 cm F₁ F₂ R=0.8 Fout
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Transcribed Image Text:3. For an active medium of length L=10cm and having lasing atoms with cross section area and
population inversion o (N2 – N1) = 0.1 cm-!, calculate the outgoing photon flux Fout after 3
passes through the medium as shown in the illustration. Assume the initial photon flux is Fo =
le20 s- cm2 and the output flux is the sum of the two transmitted fluxes as shown.
F(2) = F(0)exp(o(N2 – N¡)z)
If the photons have wavelength A-1.06 µm, what is the output power density in watts/cm2? What
is power density if wavelength 2-10.6 µm?
R=0.8
R=1.0
L=10 cm
F1
F2
Fs
Fo
Fout
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