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Research Papers

Fabrication of Lensed Plastic Optical Fiber Array Using Electrostatic Force

[+] Author and Article Information
Yih-Tun Tseng

Jhong-Bin Huang, Che-Hsin Lin, Chin-Lung Chen, Wood-Hi Cheng

 Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, 70 Lien-hai Road, Kaohsiung 804, Taiwan, R.O.C.

J. Manuf. Sci. Eng 133(3), 031016 (Jun 16, 2011) (6 pages) doi:10.1115/1.4004204 History: Received September 17, 2010; Revised April 28, 2011; Published June 16, 2011; Online June 16, 2011

The GI (graded-index) POFs (Plastic optical fibers), which has been proven to reach distances as long as 1 km at 1.25 Gb/s has a relatively low numerical aperture . Therefore, the efficient coupling of GI POFs to the light source has become critical to the power budget in the system. Efficient coupling for a POFs system normally involves either a separate lens or the direct formation of the lens at the end of the fiber. Forming the lens-like structure directly on the fiber end is preferred for simplicity of fabrication and packaging, such as polishing and fusion, combine different fibers with the cascaded fiber method and hydroflouride (HF) chemical etching. These approaches are well established, but applicable only to glass. Optical assembly architecture for multichannel fibers and optical devices is critical to optical fiber interconnections. Multichannel fiber-pigtail laser diode (LD) modules have potential for supporting higher data throughput and longer transmission distances. However, to be of practical use, these modules must be more precise. This work proposes and manufactures lensed plastic optical fibers (LPOF) array. This novel manipulation can be utilized to fabricate an aspherical lens on a fiber array after the UV curing of the photo-sensitive polymer; the coupling efficiency (CE) is increased and exceeds 47% between the LD array and the fiber array.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

The process of dropping UV-curable liquid on the fiber end

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Figure 2

Microphotographs of fabricated lens-tips with various radii of curvature

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Figure 3

The distribution of the electric field intensity on single fiber

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Figure 4

The model of the 1 × 5 LPOF array

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Figure 5

The simulated result of the 1 × 5 LPOF array

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Figure 6

The difference of the electric field intensity between the left and right of the microlens

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Figure 7

The profile of the optimal lensed fiber

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Figure 8

The experiment setup for LPOF fabrication

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Figure 9

The process of cleaved POFs array

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Figure 10

(a) The results without modifying the length of the electrode and (b) the results by applying the optimal length of the electrode

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Figure 11

The experimental results

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