Wavelength-continuous broadband adjustable dispersion compensator using higher order mode fibers and switchable fiber-gratings

We use switchable fiber-gratings in higher-order-mode fibers to demonstrate a wavelength-continuous adjustable dispersion-compensator (tuning range ~ 435 ps/nm) that is broadband (30 nm) and low loss (average ~ 3.7 dB). 40 Gb/s transmission tests reveal penalty-free operation