What are the advantages of a stripe-geometry laser as compared to a broadarea DH laser? The external differential quantum efficiency of a GaAs laser diode emitting at a wavelength of 0.9 μm is 30%....

What are the advantages of a stripe-geometry laser as compared to a broadarea DH laser?

The external differential quantum efficiency of a GaAs laser diode emitting

at a wavelength of 0.9 μm is 30%. The applied voltage is 2.5 volts. Calculate