Abstract

A new scheme for the lensed fiber employing a conical-wedge-shaped fiber endface (CWSFE) for coupling between the high-powered 980-nm laser diodes and single-mode fibers (SMFs) is proposed. The CWSFE was fabricated by following grinding and polishing techniques and then through heating in a fusing splicer to form an elliptical microlens endface. A coupling efficiency of 84% has been demonstrated. The higher coupling efficiency of the CWSFE lensed fiber was attributed to the better matching of both the elliptical Gaussian field distribution and the aspect ratio between the laser source and the fiber. In comparison to other fabrication techniques of lensed fiber used in high-power diode lasers, the advantages of this novel CWSFE structure are the ability to control over two axial curvatures and a small fiber offset through grinding and polishing processes to form a good elliptical endface. The results of this study have led to the development of a simple and reproducible fabrication process for achieving a high-yield and high-coupling CWSFE structure that is suitable for use in commercial high-power pump laser modules.

© 2005 IEEE

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  1. J. S. Major, W. E. Plano, D. F. Welch, G. T. Wiand and T. S. Stakelon, "Singlemode InGaAs-GaAs laser diodes operating at 980 nm", Electron. Lett., vol. 27, pp. 539-540, Mar. 1991.
  2. V. S. Shah, L. Curtis, R. S. Vodhanel, D. P. Bour and W. C. Yang, "Efficient power coupling from a 980-nm, broad-area laser to a single-mode fiber using a wedge-shaped fiber endface", J. Lightw. Technol., vol. 8, no. 9, pp. 1318-1313, Sep. 1990.
  3. H. M. Presby and C. R. Giles, "Asymmetric fiber microlenses for efficient coupling to elliptical laser beams", IEEE Photon. Technol. Lett., vol. 5, no. 2, pp. 184-186, Feb. 1993.
  4. C. A. Edwards, H. M. Presby and C. Dragone, "Ideal microlens for laser to fiber coupling", J. Lightw. Technol., vol. 11, no. 2, pp. 252-257, Feb. 1993.
  5. R. A. Modavis and T. W. Webb, "Anamorphic microlens for laser diode to single-mode fiber coupling", IEEE Photon. Technol. Lett., vol. 7, no. 7, pp. 798-800, Jul. 1995.
  6. H. Yoda and K. Shiraishi, "A new scheme of lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fiber", J. Lightw. Technol., vol. 19, no. 12, pp. 1917-1910, Dec. 2001.
  7. H. Yoda and K. Shiraishi, "Cascaded GI-fiber chips with a wedge-shaped end for the coupling between an SMF and a high-power LD with large astigmatism", J. Lightw. Technol., vol. 20, no. 8, pp. 1545-1548, Aug. 2002.
  8. Y. Irie, J. Miyokawa, A. Mugino and T. Shimizu, "Over 200 mW 980 nm pump laser diode module using optimized high-coupling lensed fiber", in Tech. Dig. Optical Fiber Communication Conf./Integrated Optics Optical Communications Conf. (OFC/IOOC 1999), San Diego, CA, Feb. 1999, pp. 238-240.
  9. S. M. Yeh, Y. K. Lu, S. Y. Huang, H. H. Lin and C. H. Hsieh, "A novel scheme of lensed fiber employing a quadrangular-pyramid-Ssaped fiber endface for coupling between high-power laser diodes and single-mode fibers", J. Lightw. Technol., vol. 22, no. 5, pp. 1374-1379, May 2004.
  10. J. W. Goodman, Introduction to Fourier Optics, San Francisco, CA: McGraw-Hill, 1968, ch. 4-5.
  11. D. Botez, "Near and far-field analytical approximations for the fundamental mode in symmetric waveguide DH laser", RCA Rev. , vol. 39, pp. 1059-1066, 1978.
  12. H. Kogelink, "Coupling and conversion coefficients for optical modes in quasi-optics", in Microwave Research Institute Symp. Series , vol. 14, 1964, pp. 333-347.
  13. "Prime Optical Fiber Data Sheets", Hsinchu, Taiwan, R.O.C., 2003.
  14. "ULTRAPOL 1200 Series Use Guide: Issue 5.0", ULTRA TEC, Santa Ana, CA, 2002.
  15. S. Mononobe and M. Ohtsu, "Fabrication of a pencil-shaped fiber probe for near-field optics by selective chemical etching", J. Lightw. Technol. , vol. 14, no. 10, pp. 2231-2235, Oct. 1996.
  16. "Axcel Photonics", Marborough, MA, 2004.

Other (16)

J. S. Major, W. E. Plano, D. F. Welch, G. T. Wiand and T. S. Stakelon, "Singlemode InGaAs-GaAs laser diodes operating at 980 nm", Electron. Lett., vol. 27, pp. 539-540, Mar. 1991.

V. S. Shah, L. Curtis, R. S. Vodhanel, D. P. Bour and W. C. Yang, "Efficient power coupling from a 980-nm, broad-area laser to a single-mode fiber using a wedge-shaped fiber endface", J. Lightw. Technol., vol. 8, no. 9, pp. 1318-1313, Sep. 1990.

H. M. Presby and C. R. Giles, "Asymmetric fiber microlenses for efficient coupling to elliptical laser beams", IEEE Photon. Technol. Lett., vol. 5, no. 2, pp. 184-186, Feb. 1993.

C. A. Edwards, H. M. Presby and C. Dragone, "Ideal microlens for laser to fiber coupling", J. Lightw. Technol., vol. 11, no. 2, pp. 252-257, Feb. 1993.

R. A. Modavis and T. W. Webb, "Anamorphic microlens for laser diode to single-mode fiber coupling", IEEE Photon. Technol. Lett., vol. 7, no. 7, pp. 798-800, Jul. 1995.

H. Yoda and K. Shiraishi, "A new scheme of lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fiber", J. Lightw. Technol., vol. 19, no. 12, pp. 1917-1910, Dec. 2001.

H. Yoda and K. Shiraishi, "Cascaded GI-fiber chips with a wedge-shaped end for the coupling between an SMF and a high-power LD with large astigmatism", J. Lightw. Technol., vol. 20, no. 8, pp. 1545-1548, Aug. 2002.

Y. Irie, J. Miyokawa, A. Mugino and T. Shimizu, "Over 200 mW 980 nm pump laser diode module using optimized high-coupling lensed fiber", in Tech. Dig. Optical Fiber Communication Conf./Integrated Optics Optical Communications Conf. (OFC/IOOC 1999), San Diego, CA, Feb. 1999, pp. 238-240.

S. M. Yeh, Y. K. Lu, S. Y. Huang, H. H. Lin and C. H. Hsieh, "A novel scheme of lensed fiber employing a quadrangular-pyramid-Ssaped fiber endface for coupling between high-power laser diodes and single-mode fibers", J. Lightw. Technol., vol. 22, no. 5, pp. 1374-1379, May 2004.

J. W. Goodman, Introduction to Fourier Optics, San Francisco, CA: McGraw-Hill, 1968, ch. 4-5.

D. Botez, "Near and far-field analytical approximations for the fundamental mode in symmetric waveguide DH laser", RCA Rev. , vol. 39, pp. 1059-1066, 1978.

H. Kogelink, "Coupling and conversion coefficients for optical modes in quasi-optics", in Microwave Research Institute Symp. Series , vol. 14, 1964, pp. 333-347.

"Prime Optical Fiber Data Sheets", Hsinchu, Taiwan, R.O.C., 2003.

"ULTRAPOL 1200 Series Use Guide: Issue 5.0", ULTRA TEC, Santa Ana, CA, 2002.

S. Mononobe and M. Ohtsu, "Fabrication of a pencil-shaped fiber probe for near-field optics by selective chemical etching", J. Lightw. Technol. , vol. 14, no. 10, pp. 2231-2235, Oct. 1996.

"Axcel Photonics", Marborough, MA, 2004.

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