OSA's Digital Library

Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 21, Iss. 10 — Oct. 1, 2003
  • pp: 2271–

Design Optimization of Wedge-Shaped Lensed Fibers for Fiber-Laser Coupling: Fresnel Reflection and Non-Gaussian Mode Effects

Yongzhi He, Samir K. Mondal, and Frank G. Shi

Journal of Lightwave Technology, Vol. 21, Issue 10, pp. 2271- (2003)

View Full Text Article

Acrobat PDF (591 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


Two approaches, i.e., a diffraction model considering Fresnel reflection and a paraxial beam propagation method are utilized to optimize the design of wedge-shaped lensed fibers for coupling between laser diodes of highly asymmetrical beam and single-mode fibers. It is demonstrated for the first time that, in contrast to the prevailing view, the non-Gaussian fiber-mode shape modification by the wedged fiber tip greatly reduces the coupling efficiency when the wedge angle is relatively large, while the Fresnel reflection is found to play an insignificant role. The fundamental cause of the non-Gaussian shape effect is fully explored and,consequently, a novel design is proposed to suppress this effect and increase coupling efficiency. Moreover, the novel design is relatively simple, and it does not complicate fiber tip fabrication process.

© 2003 IEEE

Yongzhi He, Samir K. Mondal, and Frank G. Shi, "Design Optimization of Wedge-Shaped Lensed Fibers for Fiber-Laser Coupling: Fresnel Reflection and Non-Gaussian Mode Effects," J. Lightwave Technol. 21, 2271- (2003)

Sort:  Journal  |  Reset


  1. H. Yoda and K. Shiraishi, "A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers", J. Lightwave Technol., vol. 19, pp. 1910-1917, Dec. 2001 .
  2. 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. OFC/IOOC'99, San Diego, CA, Feb. 1999, pp. 238- 240.
  3. J. C. Livas, S. R. Chinn, E. S. Kintzer, J. N. Walpole, C. A. Wang and L. J. Missaggia, "High-power erbium-doped fiber amplifier with 975 nm tapered-gain-region laser pumps", Electron. Lett., vol. 30, pp. 1054-1055, 1994.
  4. 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.
  5. R. A. Modavis and T. W. Webb, "Anamorphic microlens for laser diode to single-mode fiber coupling", IEEE. Photon. Technol. Lett., vol. 7, pp. 798-800, July 1995.
  6. C. A. Edwards, H. M. Presby and C. Dragone, "Ideal microlenses for laser to fiber coupling", J. Lightwave Technol., vol. 11, pp. 252-257, Feb. 1993 .
  7. W. P. Huang and C. L. Xu, "Simulation of three-dimensional optical waveguides by a full-vector beam propagation method", IEEE J. Quantum Electron., vol. 29, pp. 2639 -2649, Oct. 1993.
  8. B. Hermansson, D. Yevick and J. Saijonmaa, "Propagating-beam-method analysis of two-dimensional microlenses and three-dimensional taper structures", J. Opt. Soc. Amer. A, vol. 1, pp. 663-671, 1984.
  9. Y. L. Hsueh, M. C. Yang and H. C. Chang, "Three-dimensional noniterative full-vectorial beam propagation method based on the alternating direction implicit method", J. Lightwave Technol., vol. 17, pp. 2389-2397, Nov. 1999.
  10. D. Marcuse, "Loss analysis of single-mode fiber splices", Bell Syst. Tech. J., vol. 56, pp. 703-718, 1977.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited