Novel optical fiber designs for gain flattened optical amplification and dispersion compensation

Optical amplifiers and dispersion compensators form important components of any DWDM system and the overall performance of the system depends critically on the spectral properties of these and other components in the link. This has led to the development of optical amplifiers and fiber based dispersion compensators with specific wavelength dependent characteristics. Dual concentric core fibers and asymmetric twin core fibers posses very interesting modal characteristics in terms of chromatic dispersion, spectral dependence of modal field profiles and bend induced attenuation etc. and with proper designs they can be tailored to have the desired spectral properties. This talk will present our recent work on different novel dual concentric core and asymmetric twin core fiber designs for efficient dispersion compensation and achieving intrinsically flat gain EDFAs in C-band and S-band and flat gain Raman fiber amplifiers.