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The external power efficiency of an injection laser with a GaAs is 13% having band gap energy of 1.64 eV. Determine external power efficiency.

The external power efficiency of an injection laser with a GaAs is 13% having band gap energy of 1.64 eV. Determine external power efficiency. Correct Answer 0.198

The external power efficiency of an injection laser is given by ηep = ηT (Eq/V)*100 ηT = ηep/100 (v/Eg) = 13/100 (2.5/1.64) = 0.198.

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