Efficient coupling of noncoherent light to fiber optic light guides

Ronald F. Mathis

doi:10.1117/12.290224

3 October 1997 Efficient coupling of noncoherent light to fiber optic light guides

Ronald F. Mathis

Proceedings Volume 3139, Nonimaging Optics: Maximum Efficiency Light Transfer IV; (1997) https://doi.org/10.1117/12.290224
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The amount of light that can be coupled from a noncoherent lamp into an optical fiber of small size and limited numerical aperture is restricted by fundamental principles. High power lamps have the additional problem that there is too much light resulting in burned fiber or wasted light. This paper describes a new high efficiency coupling approach that is particularly applicable to high power lamps such as the 1000 Watt electrodeless Sulfer lamp manufactured by Fusion LIghting Inc. A semi spherical array of lenses is used to focus light onto individual large core fibers or fiber bundles. The design constraints are the size and shape of the optical source, and the size and numerical aperture of the fibers. The variables are the number of lenses in the array (which determines the number of fibers) and the lens power. There are enough degrees of freedom to design a system that can theoretically couple nearly 100% of the light into the fibers.

Citation Download Citation

Ronald F. Mathis "Efficient coupling of noncoherent light to fiber optic light guides", Proc. SPIE 3139, Nonimaging Optics: Maximum Efficiency Light Transfer IV, (3 October 1997); https://doi.org/10.1117/12.290224

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