Abstract. We present a design of double cladding nearly zero dispersion flattened nonlinear photonic crystal fiber (PCF) with the core consisting of seven missing holes. The dispersion of the designed PCF fluctuates from -0.28 to 0.29 ps·km⁻¹·nm⁻¹ in the range of 1.35-1.795μm and the dispersion slope is −0.0038 ps·km⁻¹·nm⁻² at 1.55 μm. Due to its small air-hole to air-hole pitch in the inner cladding, the effective mode area is 6.48μm² and the effective nonlinearity γ is as high as 13.78 W⁻¹ km⁻¹ at 1.55 μm. Two layers of air-hole rings in the outer cladding ensures the loss of the fundamental mode to be 2.9dB/km at 1.55 μm and two more air-hole rings can further reduce the fundamental mode's loss to the level of 4.2 × 10⁻³ dB/km.

PACS numbers: 42.65.−k, 42.81.−i, 42.81.Qb

Print publication: Issue 11 (November 2009)
Received 25 May 2009