Abstract

An approximate analytical model is developed for calculating the out-of-plane coupling efficiency between an elliptical Gaussian beam from a laser diode and an angled single-mode fiber. The simulation results obtained from the model indicate that when a laser diode has no tilt the coupling efficiency varies with relative rotation angle at a period of \pi rather than remains constant, and the period changes from \pi toward 2\pi as the tilt angle of laser diode increases. A proof-of-principle experiment is performed to demonstrate the validity of the model as the elliptical factor becomes large. Potential applications by employing the model are discussed.

[IEEE ]

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  1. K. Kawano, M. Saruwatari, and O. Mitomi, "A new confocal combination lens method for a laser-diode module using a single-mode fiber," J. Lightwave Technol., vol. 3, pp. 739-745, Apr. 1985.
  2. 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.
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  5. Z. Wang, B. Mikkelsen, B. Pedersen, K. E. Stubkjaer, and D. S. Olesen, "Coupling between angled-facet amplifiers and tapered lens-ended fibers," J. Lightwave Technol., vol. 9, pp. 49-54, Jan. 1991.
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  7. L. A. Wang, and C. D. Su, "Tolerance analysis of aligning an astigmatic laser diode with a single-mode optical fiber," J. Lightwave Technol., vol. 14, pp. 2757-2762, Dec. 1996.

J. Lightwave Technol. (7)

K. Kawano, M. Saruwatari, and O. Mitomi, "A new confocal combination lens method for a laser-diode module using a single-mode fiber," J. Lightwave Technol., vol. 3, pp. 739-745, Apr. 1985.

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.

Y. Twu, P. Parayanthal, B. A. Dean, and R. L. Hartman, "Studies of reflection effects on device characteristics and system performances of 1.5-\mum semiconductor DFB Lasers," J. Lightwave Technol., vol. 10, pp. 1267-1271, Sept. 1992.

K. Shiraishi, H. Ohnuki, N. Hiraguri, K. Matsumura, L Ohishi, H. Morichi, and H. Kazami. " A lensed-fiber coupling scheme utilizing a graded-index fiber and a hemispherically ended coreless fiber tip," J. Lightwave Technol., vol. 15, pp. 356-363, Feb. 1997.

Z. Wang, B. Mikkelsen, B. Pedersen, K. E. Stubkjaer, and D. S. Olesen, "Coupling between angled-facet amplifiers and tapered lens-ended fibers," J. Lightwave Technol., vol. 9, pp. 49-54, Jan. 1991.

H. Karstensen and K. Dr gem ller, "Loss analysis of laser diode to single-mode fiber couplers with glass spheres or silicon plano-convex lenses," J. Lightwave Technol., vol. 8, pp. 739-747, May 1990.

L. A. Wang, and C. D. Su, "Tolerance analysis of aligning an astigmatic laser diode with a single-mode optical fiber," J. Lightwave Technol., vol. 14, pp. 2757-2762, Dec. 1996.

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