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Coupling Efficiency of LED to Fiber Optic Guide
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[QUOTE="BenPhysicist, post: 6367572, member: 680064"] [B]Homework Statement:[/B] Most surface mount types of LED’s have a very nearly cosine distribution of light intensity. If we desire to inject light from an LED to the end of a cylindrical optical guide, what is the coupling efficiency as a function of distance (x) from the end of the guide? Assume that the LED is a point source and that the fiber has a diameter D [B]Relevant Equations:[/B] I found that the half cone angle let's call it theta=arctan(D/2x) Now that I know theta, I'm trying to use that to calculate the coupled light. What unit am I looking for, is it luminous intensity? I'm thinking I have to integrate from 0 to theta but I'm not sure what the integral looks like. Any ideas? Most surface mount types of LED’s have a very nearly cosine distribution of light intensity. If we desire to inject light from an LED to the end of a cylindrical optical guide, what is the coupling efficiency as a function of distance (x) from the end of the guide? Assume that the LED is a point source and that the fiber has a diameter D [/QUOTE]
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