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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.

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. Correct Answer 9.551*10-5

The optical power coupler in the step index fiber of SLED is given by Pc = π(1-r) A RD(NA) 2 = 3.14 (1-0.03)*1.96*10-5*40*(0.2) 2 = 9.551*10-5W.

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