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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 14746–14762

Semi-guiding high-aspect-ratio core (SHARC) fiber providing single-mode operation and an ultra-large core area in a compact coilable package

David A. Rockwell, Vladimir V. Shkunov, and John R. Marciante  »View Author Affiliations


Optics Express, Vol. 19, Issue 15, pp. 14746-14762 (2011)
http://dx.doi.org/10.1364/OE.19.014746


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Abstract

A new class of optical fiber is presented that departs from the circular-core symmetry common to conventional fibers. By using a high-aspect-ratio (~30:1) rectangular core, the mode area can be significantly expanded well beyond 10,000 μm2. Moreover, by also specifying a very small refractive-index step at the narrow core edges, the core becomes “semi-guiding,” i.e. it guides in the narrow dimension and is effectively un-guiding in the wide mm-scale dimension. The mode dependence of the resulting Fresnel leakage loss in the wide dimension strongly favors the fundamental mode, promoting single-mode operation. Since the modal loss ratios are independent of mode area, this core structure offers nearly unlimited scalability. The implications of using such a fiber in fiber laser and amplifier systems are also discussed.

© 2011 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2400) Fiber optics and optical communications : Fiber properties
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(130.2790) Integrated optics : Guided waves
(230.7370) Optical devices : Waveguides

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 13, 2011
Manuscript Accepted: July 4, 2011
Published: July 15, 2011

Citation
David A. Rockwell, Vladimir V. Shkunov, and John R. Marciante, "Semi-guiding high-aspect-ratio core (SHARC) fiber providing single-mode operation and an ultra-large core area in a compact coilable package," Opt. Express 19, 14746-14762 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-15-14746


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