A DH surface emitter which has an emission area diameter of 50 m is butt jointed to

A DH surface emitter which has an emission area diameter of 50 μm is butt jointed to an 80 μm core step index fiber with a numerical aperture of 0.175. The device has a radiance of 35 W sr−1 cm−2 at a constant operating drive current. Estimate the optical power coupled into the fiber if it is assumed that the Fresnel reflection coefficient at the index matched fiber surface is 0.01.

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Qiven data d 5oum NA 015 13D RpE 30 W scm ... View the full answer