Figure 1.

Fabrication method of the micro-structures at the end of the fiber: (a) it starts by cleaving two types of optical fibers: a SM and a section of a MM fiber; which are then spliced together. The resultant fiber portion is spliced once again and placed on a moving stage; (b) Then, it is dipped into the solution with the photo-initiator and monomer; (c) When the fiber is dipped out from this solution, a drop of liquid is formed on its tip; (d) Then, the liquid drop is exposed to the laser source, cured, and the remaining non-polymerized monomer solution portions are washed out using ethanol and the polymeric fiber tip is then formed on the top of the fiber; (e) Visual aspect of the final micro-lens on the top of an optical fiber.