Write the role of resonant cavity in the operation of LASER?

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written 7.9 years ago by

neeta.vanage • 880

modified 3.9 years ago by

pedsangini276 • 4.8k

Subject :- Applied Physics 2.

Topic :- Laser.

Difficulty :- Medium.

engineering physics

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1 Answer

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written 7.8 years ago by

neeta.vanage • 880

Light can be amplified by an active medium taken into the state of population inversion. To achieve stimulated emission, $N_2$ should be made greater than $N_1$ and radiation density should be high. These requirements are met with the help of an optical cavity resonator.

An optical resonator consists of two …

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