Novera Optics™ DGEP™ dynamic spectral equalizers are modular subsystems that provide gain flattening and tilt control in optical networks. DGEP equalizers utilize patented all-fiber acousto-optical filter technology to accomplish dynamic optical filtering in-the-fiber, delivering high performance with low insertion loss. Eight software-controlled optical notch filters operate in a closed-loop system. When inserted into the mid-stage of EDFA line amplifiers, DGEP equalizers provide finely-tunable compensation of spectral impairments in either the C or L Bands. DGEP equalizers feature low insertion loss, low polarization dependence, and operate over a broad wavelength range. Operation is line rate and channel spacing independent. A sophisticated control algorithm accepts spectral data (power per channel) from the user's optical spectral monitor via an RS-232 interface, computes filter parameters, and adjusts the tunable optical filters to achieve the desired spectral characteristics.