Frequency-modulated pulse amplification model in three-level optical amplifier with inhomogenious normal dispersion and pump depletion

The possibility of the effective self-similar frequency-modulated (FM) pulse amplification is studied in inhomogeneous amplifiers. The dynamics features of the gain are considered in the erbium-doped fiber amplifiers operating in a three-level scheme. It is shown that the use of active optical waveguides with a suitably chosen profile of normal group velocity dispersion can provide efficient amplification of subpicosecond pulses.