Large effective area all-solid dispersion compensating fiber

We present a large-mode-area (LMA) dispersion compensating fiber (DCF) design amenable to fabrication by the modified chemical vapor deposition (MCVD) technique. The design utilizes resonance between two concentric cores, one of which is highly asymmetric to achieve high negative dispersion. The magnitude and wavelength bandwidth of negative dispersion can be controlled by various design parameters. Here we demonstrate numerically simulated designs for (i) narrowband dispersion compensation and (ii) broadband dispersion compensation. In narrowband DCF designs we show negative dispersion as large as − 14 500 ps nm−1 km−1 with corresponding mode effective area 86 µm2. In the broadband designs, we show dispersion ranging between − 80 and − 280 ps nm−1 km−1 over a 40 nm wavelength range, the kappa value (ratio of dispersion and dispersion slope) near 30 nm, the figure of merit (ratio of magnitude of dispersion and fiber loss coefficient) 1030 ps (dB km)−1, and the mode effective area 63 µm2. A fiber with such a high negative dispersion and large effective area would be useful for efficient dispersion compensation in single-wavelength as well as wavelength division multiplexing (WDM) optical communication systems