Device for chemically etching a fiber probe

摘要

A two-phase etching system having an etchant solution and an overlayer of a protective solvent. The physical properties of the etchant solution and the protective solvent are matched to form a flat meniscus on the top surface of the etchant solution around a fiber immersed in the protective solvent and the etchant solution. Convective flows within the etchant solution are maintained in order to form a smooth and sharp fiber probe with a small tip apex.