Answer to Question #81513 in Optics for Tamim

Question

.Problem 1.1
A HeNe laser at a wavelength of 632.8 nm emits 1mW of light in a continuous beam
(known as ‘cw’ or continuous-wave lasing)
a) Calculate the stimulated emission rate in s-1
b) Estimate the population in m-3 of Ne atoms in the upper laser level, assuming
that the gain medium is 10 cm long, the single-pass gain is 3%, and the
stimulated emission cross-section of the 632.8-nm transition is ~10-17 m2
.

Answer 1

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