A novel scheme of optical pulse width compression using a feedback optical phase modulator

This paper presents a scheme for the compression of optical pulse widths by using a feedback optical phase modulator. In the first part of the proposed circuit, the carrier and two fourth-order sidebands on either side of the carrier are amplified and phase shifted before getting combined by an optical power combiner to generate a picosecond optical pulse. The optical pulse generated by this part of the circuit has a calculated width of 3.5 ps. This optical pulse when passed through a feedback optical phase modulator produces a compressed optical pulse at the output. By making the drive frequency of the feedback optical phase modulator equal to 100 GHz, we found the output optical pulse to have a calculated width of 1.0 ps. PACS 42.65.Re; 42.79.Sz; 42.62.-b; 42.30.Lr; 42.55.Px; 42.60.Fc; 42.70.Mp