LONG-PULSE LASER-ASSISTED SURFACE MODIFICATION OF AN IMAGING FIBER FOR FABRICATION OF INTEGRATED FIBER MICROLENSES

V. M. Murukeshan (), M. A. Khirman, H. Y. Zheng and J. L. Tan
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V. M. Murukeshan: School of Mechanical and Production Engineering, Nanyang Technological University, Singapore 639798, Singapore
M. A. Khirman: School of Mechanical and Production Engineering, Nanyang Technological University, Singapore 639798, Singapore
H. Y. Zheng: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore
J. L. Tan: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore

Surface Review and Letters (SRL), 2004, vol. 11, issue 03, 259-264

Abstract: This paper discusses the results obtained with a long pulse laser (such as a CO2laser) assisted shaping of microspherical lenses at the end face of a specialty image fiber. The 600-μm-diameter image fiber consists of 15 000 pixels (individual fibers) with a spatial resolution of 267/mm. When laser-assisted heating is induced at the surface of the fiber tip, it tends to become spherical in shape due to surface tension. The curvature formed at the surface will act as the microspherical lens. The effects of the laser repetition rate and irradiation time on the surface finish and curvature of the shaped lens are illustrated in this paper.

Keywords: Laser-assisted surface modification; micromachining; long pulse laser; image fiber; microspherical lens (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1142/S0218625X04006165

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