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Proceedings Article

"Vanishing-core" tapered coupler for interconnect applications

[+] Author Affiliations
Dan Neugroschl, Victor I. Kopp, Jonathan Singer, Guoyin Zhang

Chiral Photonics, Inc. (USA)

Proc. SPIE 7221, Photonics Packaging, Integration, and Interconnects IX, 72210G (February 12, 2009); doi:10.1117/12.808632
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From Conference Volume 7221

  • Photonics Packaging, Integration, and Interconnects IX
  • Alexei L. Glebov; Ray T. Chen
  • San Jose, CA | January 24, 2009

abstract

The "vanishing-core" tapered coupler is an all-fiber device that efficiently couples light between a standard low-numerical- aperture (NA) waveguide, such as a standard silica fiber, and a high-NA waveguide or device with a dissimilar mode field profile, such as a planar waveguide or laser diode. The coupler is comprised of a central core surrounded by a concentric secondary core for low-NA coupling on one side of the device. The central core effectively disappears on the tapered end of the device. Light escaping the "vanishing-core" at the tapered end of the fiber is confined in the secondary core by the surrounding cladding for high-NA coupling. This lens-less, low-insertion-loss solution obviates the need for a significant air gap between coupled components required in lensed fibers and thereby enables the use of index matching compounds. The all-fiber design also facilitates polarization selective and polarizing coupling and provides a path towards a high density of passively aligned interconnects.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Dan Neugroschl ; Victor I. Kopp ; Jonathan Singer and Guoyin Zhang
""Vanishing-core" tapered coupler for interconnect applications", Proc. SPIE 7221, Photonics Packaging, Integration, and Interconnects IX, 72210G (February 12, 2009); doi:10.1117/12.808632; http://dx.doi.org/10.1117/12.808632


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