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Applied Optics

Applied Optics


  • Vol. 37, Iss. 15 — May. 20, 1998
  • pp: 3201–3205

Ball-lens coupling efficiency for laser-diode to single-mode fiber: comparison of independent studies by distinct methods

Robert Gale Wilson  »View Author Affiliations

Applied Optics, Vol. 37, Issue 15, pp. 3201-3205 (1998)

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Results of two recent studies representing distinct approaches to optimizing laser-diode to single-mode fiber ball-lens coupling efficiency are compared and revealed to be in close agreement. One method is based on a conventional optical analysis–design program combining geometrical and diffraction methods, merged with calculated coupling efficiency in terms of balanced spherical aberration. The other is based on exact solution of Maxwell’s equations for scattering of a beam from a dielectric sphere. The results suggest that optimum coupling efficiency may depend critically on sufficiently fine discretization of the distances of source and fiber from the lens. The studies compared here are synergistic with several other recently reported studies on coupling efficiency, and those studies are appropriately cross referenced. A graphic relationship is developed between coupling efficiency and Strehl ratio as an optical tolerance for the coupling system based on balanced spherical aberration.

© 1998 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(080.3630) Geometric optics : Lenses
(140.2020) Lasers and laser optics : Diode lasers
(220.1000) Optical design and fabrication : Aberration compensation
(220.2560) Optical design and fabrication : Propagating methods
(350.3950) Other areas of optics : Micro-optics
(350.5730) Other areas of optics : Resolution

Original Manuscript: October 14, 1997
Revised Manuscript: February 9, 1998
Published: May 20, 1998

Robert Gale Wilson, "Ball-lens coupling efficiency for laser-diode to single-mode fiber: comparison of independent studies by distinct methods," Appl. Opt. 37, 3201-3205 (1998)

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