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Proceedings Paper

"Vanishing-core" tapered coupler for interconnect applications
Author(s): Dan Neugroschl; Victor I. Kopp; Jonathan Singer; Guoyin Zhang
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Paper 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.

Paper Details

Date Published: 12 February 2009
PDF: 8 pages
Proc. SPIE 7221, Photonics Packaging, Integration, and Interconnects IX, 72210G (12 February 2009); doi: 10.1117/12.808632
Show Author Affiliations
Dan Neugroschl, Chiral Photonics, Inc. (United States)
Victor I. Kopp, Chiral Photonics, Inc. (United States)
Jonathan Singer, Chiral Photonics, Inc. (United States)
Guoyin Zhang, Chiral Photonics, Inc. (United States)


Published in SPIE Proceedings Vol. 7221:
Photonics Packaging, Integration, and Interconnects IX
Alexei L. Glebov; Ray T. Chen, Editor(s)

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