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Optical pumping happens via ___________

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Optical pumping happens via ___________

(a) Spontaneous emission

(b) Spontaneous Absorption

(c) Stimulated emission

(d) Stimulated Absorption

This question was posed to me in quiz.

My doubt stems from Pumping Mechanism topic in section Laser of Engineering Physics II

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The correct option is (d) Stimulated Absorption

For explanation I would say: In optical pumping, a highly intense radiation from an optical flash tube is incident on the active medium, raising the atoms to a higher energy state through stimulated absorption.

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