Calculate the ratio of the rates of stimulated emission to

Reference no: EM13614708

Calculate the ratio of the rates of stimulated emission to spontaneous emission for a HeNe laser operating at 632.8nm. The laser has an output power of 1mW and a beam diameter of 1mm. The output mirror has 1% transmission at the laser wavelength and the width of the fluorescent line-shape is delta-nu =1.5GHz. Compare the rates at the central operating frequency. Hint: calculate A/B21 then invert it. Multiply by g(nu) I/c to get the required ratio. n.b. the ‘I' in the formula is Irradiance, check the definition.

Reference no: EM13614708

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