Exam 17: Led Efficiency and Power Generation in Optical Communication

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The active layer of E-LED is heavily doped with

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Determine coupling efficiency into the fiber when GaAs LED is in close proximity to fiber core having numerical aperture of 0.3

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Internal absorption in DH surface emitter Burros type LEDs is

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Determine the internal quantum efficiency generated within a device when it has a radiative recombination lifetime of 80 ns and total carrier recombination lifetime of 40 ns.

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Estimate optical power coupled into fiber of DH SLED having emission area of 1.96*10?5, radiance of 40 W/rcm2, numerical aperture of 0.2 and Fresnel reflection coefficient of 0.03 at index matched fiber surface.

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