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Fabrication of Micro Fresnel Zone Plate Lens on a Mode-Expanded Hybrid Optical Fiber Using a Femtosecond Laser Ablation System

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7 Author(s)
Jun Ki Kim ; Dept. of Phys., Yonsei Univ., Seoul ; Jongki Kim ; Kyunghwan Oh ; Ik-Bu Sohn
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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.

Published in:

IEEE Photonics Technology Letters  (Volume:21 ,  Issue: 1 )