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What are different types of pumping and pumping schemes. Why four level pumping schemes is superior to three level. Why two-level pumping scheme is not suitable?
written 7.9 years ago by gravatar for neeta.vanage neeta.vanage • 880 modified 3.9 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
engineering physics
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written 7.8 years ago by gravatar for neeta.vanage neeta.vanage • 880

For maintaining a state of population inversion atoms have to be raised continuously to excited state. It requires energy to be supplied to the system. The process of supplying energy to the medium with a view to transfer it into state of population inversion is known as pumping. Commonly used …

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