Title :
Fabrication of Micro Fresnel Zone Plate Lens on a Mode-Expanded Hybrid Optical Fiber Using a Femtosecond Laser Ablation System
Author :
Jun Ki Kim ; Jongki Kim ; Kyunghwan Oh ; Ik-Bu Sohn ; Woojin Shin ; Hae Young Choi ; ByeongHa Lee
Author_Institution :
Dept. of Phys., Yonsei Univ., Seoul
Abstract :
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-mum diameter was adapted. Focusing properties of the zone plate lens were experimentally investigated and compared with numerical simulations.
Keywords :
high-speed optical techniques; integrated optics; laser ablation; lenses; micro-optics; optical fibre fabrication; silicon compounds; zone plates; SiO2; compact all fiber zone plate lens; coreless silica fiber; femtosecond laser ablation system; micro Fresnel zone plate lens fabrication; mode expanded hybrid fiber; mode expanded hybrid optical fiber; size 200 mum; Fiber lasers; Fresnel reflection; Laser ablation; Laser beams; Laser modes; Lenses; Optical device fabrication; Optical fibers; Surface emitting lasers; Ultrafast optics; Coreless silica fiber (CSF); Fresnel zone plate; laser ablation; lensed fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.2007912
