Fabrication of micro Fresnel zone plate lens on a mode-expanded hybrid optical fiber using a femtosecond laser ablation system
IEEE Photonics Technology Letters, 2009•ieeexplore.ieee.org
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.
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.
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.
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