Low-cost, high-precision micro-lensed optical fiber providing deep-micrometer to deep-nanometer-level light focusing. Academic Article uri icon


  • A new type of micro-lensed optical fiber through stacking appropriate high-refractive microspheres at designed locations with respect to the cleaved end of an optical fiber is numerically and experimentally demonstrated. This new type of micro-lensed optical fiber can be precisely constructed with low cost and high speed. Deep micrometer-scale and submicrometer-scale far-field light spots can be achieved when the optical fibers are multimode and single mode, respectively. By placing an appropriate teardrop dielectric nanoscale scatterer at the far-field spot of this new type of micro-lensed optical fiber, a deep-nanometer near-field spot can also be generated with high intensity and minimum joule heating, which is valuable in high-speed, high-resolution, and high-power nanoscale detection compared with traditional near-field optical fibers containing a significant portion of metallic material.

published proceedings

  • Opt Lett

author list (cited authors)

  • Wen, S., Sundaram, V. M., McBride, D., & Yang, Y. u.

citation count

  • 12

complete list of authors

  • Wen, Sy-Bor||Sundaram, Vijay M||McBride, Daniel||Yang, Yu

publication date

  • April 2016