We describe a zoned microstructure fiber that exhibits low dispersion and virtually zero spherical aberration because of its optimized piecewise Gaussian index profile. We present results of a nine-zone design that has an average refractive index of 2.3, a refractive-index contrast of 0.1, a first zone radius of 1.67 μm, and a maximum core radius of 5 μm . It has an in-fiber focal length of 8.88 μm and can focus light to a spot size of radius 315 nm, facilitating efficient coupling between single-mode fiber and photonic crystals.
© 2004 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2400) Fiber optics and optical communications : Fiber properties
Makiko Hisatomi, Michael C. Parker, and Stuart D. Walker, "Zoned microstructure fiber for low-dispersion waveguiding and coupling to photonic crystals," Opt. Lett. 29, 1054-1056 (2004)