Which of the following factor does not harm laser efficiency? ∙ a. Atmospheric absorption ∙ b. Excitation energy not absorbed ∙ c. Problems in depopulating the lower laser level ∙ d. Inefficiency in populating the upper laser level

Which of the following factor does not harm laser efficiency?
∙ a. Atmospheric absorption  
∙ b. Excitation energy not absorbed  
∙ c. Problems in depopulating the lower laser level  
∙ d. Inefficiency in populating the upper laser level
by

1 Answer

Answer :

∙ a. Atmospheric absorption
by

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