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The total efficiency of an injection laser with GaAs active region is 12%. The applied voltage is 3.6 V and band gap energy for GaAs is 2.34 eV. Determine external power efficiency.

The total efficiency of an injection laser with GaAs active region is 12%. The applied voltage is 3.6 V and band gap energy for GaAs is 2.34 eV. Determine external power efficiency. Correct Answer 7.8 %

The total external power efficiency is defined as η = ηT(Eq/V)*100 = 0.12 (2.34/3.6) *100 = 7.8 %.

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