In this paper, the study of effective parameters in fabrication of optical tapered-fiber lenses is performed. First, a method, called tube etching for the fabrication of tapered optical fiber is presented. Tapered-tip formation occurs inside a cylindrical cavity formed by the polymer coating of an optical fiber which is not stripped away prior to etching in hydrofluoric acid. The influence of temperature, etchant concentration, and fiber type on the tapered-tip angle is experimentally studied. Then, we have investigated a method to produce lensed-tapered optical fiber with a given lens radius to achieve the required divergence and spot size in a repeatable fashion.

Keywords: Optical fiber, Tapered-Lensed Fiber Tip, Tapered fiber Tip Quality, Fiber Output Characteristics

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