21 August 1995 Calculation of the efficiency of coupling light from a stripe-geometry GaAs laser into optical fiber with two-layer spherical end
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Abstract
The coupling efficiency of light from a GaAs laser into an optical fiber with two-layer spherical end. In this paper, the formulas of calculating the half-acceptance angle of the fiber with two-layer spherical end is derived first. The relationship between the angle (theta) and the refractive angle (gamma) ((theta) ) is derived by ray-tracing techniques. A more complete analysis is done for the restriction by which a ray may not be accepted into the fiber core, namely, waveguide, grazing incidence, and core-aperture restriction. We also calculate the maximum acceptance angle of our fibers and the efficiency of coupling a semiconductor laser beam into an optical fiber with two-layer spherical lens on fiber end. The highly coupling efficiency of up to 80% is arrived.
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Hong Ju Liu, Hong Ju Liu, "Calculation of the efficiency of coupling light from a stripe-geometry GaAs laser into optical fiber with two-layer spherical end", Proc. SPIE 2538, Nonimaging Optics: Maximum Efficiency Light Transfer III, (21 August 1995); doi: 10.1117/12.216986; https://doi.org/10.1117/12.216986
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