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  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper CTuK1

Characterization of the Interference Coupling Technique into Single Mode Fibers

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Abstract

Coupling light into a waveguide or a fiber is typically based on using a lens with a small f-number to focus the input beam into the waveguide. Such a coupling scheme becomes increasingly complex and lossy for Single-Mode Fibers (SMF).1 We show that this problem can be overcome by launching the central fringe, generated by the interference pattern of two Gaussian beams, into a SMF or a waveguide. In an earlier publication, we have demonstrated that using interference schemes, it is possible to enhance the coupling efficiency in a quasi-phase matched second-harmonic generation process by as much as 67% in 4 μm wide waveguides.2

© 2002 Optical Society of America

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