Question

A solid laser emits radiation of wavelength of 6000 A and the life time Tsp=10^-6 s. Assume that the refractive index of the medium is one and the co-efficient of stimulated emission is​

Answer 1

Answer:

The stimulated emission cross section is

sigma(21) = A(21).[ { (Lambda)^2 / (8 .pi. n^2} ]. g( freq)

where A21 is the Einstein A coefficient, λ -lambda is the wavelength in vacuum,

n is the refractive index of the medium (dimensionless), and g(freq) is the spectral line shape function

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