We present a compact all-fiber zone plate lens directly ablated on the surface of a mode-expanded hybrid fiber end by using a high precision femtosecond laser processing technique. To achieve a sufficiently large beam size and focusing efficiency, a segment of a coreless silica fiber having a 200-μm diameter was adapted. Focusing properties of the zone plate lens were experimentally investigated and compared with numerical simulations.
Bibliographical noteFunding Information:
Manuscript received August 26, 2008; revised September 30, 2008. Current version published January 05, 2009. This work was supported in part by the KOSEF under Programs ROA-2008-000-20054-0, R01-2006-000-11277-0, and R15-2004-024-00000-0), in part by the KICOS under Programs 2007-8-0536 and 2007-8-1864, in part by ITEP under Program 2007-8-2074, in part by the Brain Korea-21 Information Technology Project, and in part by the GIST Top Brand Project.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering