Design and Fabrication of Fiberlenses for Optical Recording Applications

The novel design and fabrication of a microlens on the front end of a single-mode fiber is described. The beam quality and spot size for optical recording applications are analyzed. A hyperbolic-shaped microlens on a single-mode fiber with focused spot of 1/ e 2 =0.82 µm ( x -direction) and 0.89 µm ( y -direction) at ∼ 145 µm working distance was achieved by a simple fabrication procedure.