Abstract

A novel lensed fiber employing a wedge-shaped graded-index fiber (GIF) is proposed. The characteristic of coupling loss as a function of the aspect ratio is numerically investigated. When the aspect ratio is seven,the coupling loss of a wedge-shaped GIF and a conventional wedge-shaped SMF are 0.22 dB and 0.60 dB, respectively, and when the aspect ratio is 13, they are 0.5 dB and 2.4 dB. The tolerance to laser diode (LD)-fiber displacement is also numerically investigated, and it is confirmed that the proposed fiber has larger tolerance than a conventional wedge-shaped single-mode fiber (SMF). The performance of the new lensed fiber is also experimentally verified.

[IEEE ]

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References

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  1. V. S. Shah, L. Curtis, R. S. Vodhanel, D. P. Bour and W. C. Young, "Efficient power coupling from a 980-nm, broad-area laser to a single-mode fiber using a wedge-shaped fiber endface", J. Lightwave Technol., vol. 8, pp. 1313-1318, Sept. 1990 .

J. Lightwave Technol. (1)

V. S. Shah, L. Curtis, R. S. Vodhanel, D. P. Bour and W. C. Young, "Efficient power coupling from a 980-nm, broad-area laser to a single-mode fiber using a wedge-shaped fiber endface", J. Lightwave Technol., vol. 8, pp. 1313-1318, Sept. 1990 .

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