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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 23 — Nov. 7, 2011
  • pp: 22993–22998

Fabrication of asperical lensed optical fibers with an electro-static pulling of SU-8 photoresist

Chun-Ching Wu, Yi-Dun Tseng, Su-Ming Kuo, and Che-Hsin Lin  »View Author Affiliations

Optics Express, Vol. 19, Issue 23, pp. 22993-22998 (2011)

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A novel method is presented for fabricating lensed optical fibers for enhancing the coupling efficiency between high-power IR laser diodes and gradient-index fibers (GIF). SU-8 photoresist is attached to the fiber tip by means of surface tension forces and a cone-shaped micro-lens structure is then formed using an electrostatic pulling method. It is shown that micro-lenses with various radii of curvature can be easily formed by tuning the intensity of the electric field used in the pulling process. Experimental results show that for a laser diode chip with a central wavelength of 1310 nm, a coupling efficiency of 78% can be obtained using a lensed optical fiber with a radius of curvature of 48 μm. By contrast, the coupling efficiency of a traditional flat-end fiber is just 40%. Overall, the fabrication method proposed in this study provides a rapid and low-cost solution for the mass production of high-quality lensed optical fibers.

© 2011 OSA

OCIS Codes
(220.4610) Optical design and fabrication : Optical fabrication
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Optical Design and Fabrication

Original Manuscript: August 18, 2011
Revised Manuscript: October 14, 2011
Manuscript Accepted: October 17, 2011
Published: October 28, 2011

Chun-Ching Wu, Yi-Dun Tseng, Su-Ming Kuo, and Che-Hsin Lin, "Fabrication of asperical lensed optical fibers with an electro-static pulling of SU-8 photoresist," Opt. Express 19, 22993-22998 (2011)

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