Holey fibers with small-core dimensions relative to the optical wavelength and large air-filling fractions offer tight mode confinement and are therefore attractive for highly nonlinear fiber applications. We investigated the role of confinement loss in these small-core fibers to optimize the design of practical highly nonlinear fibers. We found that silica holey fibers can exhibit effective nonlinearities as great as 52 W<sup>−1</sup> km<sup>−1</sup> and that the confinement loss can be less than the losses of standard fiber types. We show that the dispersive properties of some of the designs are suitable for a range of device applications.
© 2003 Optical Society of America
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2400) Fiber optics and optical communications : Fiber properties
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
Vittoria Finazzi, Tanya M. Monro, and David J. Richardson, "Small-core silica holey fibers: nonlinearity and confinement loss trade-offs," J. Opt. Soc. Am. B 20, 1427-1436 (2003)