The coupling efficiency for different shape curve of specialty optical taper

摘要

A specialty optical taper is proposed for receiving optical signal. According to the geometrical optics, the coupling efficiency for different shape curve is analyzed, such as piecewise function type, parabola type, and linear type. The relationship between the different large endface radius, small endface radius, taper length, refractive index and coupling efficiency is analyzed, respectively. By comparing the input and output light energy of specialty optical taper, the coupling efficiency can be analyzed in experiment. The experimental results are in good accordance with the theoretical data. For the ±1.5 mm radial displacement, the coupling efficiency can be more than 50% in different directions, respectively. Finally, the errors are also given.