Tunable fractional-order photonic differentiator using a distributed feedback semiconductor optical amplifier

Abstract

We propose a tunable fractional-order photonic differentiator based on a distributed feedback semiconductor optical amplifier (SOA) working in reflection mode. The phase shift at the resonant wavelength can be adjusted by controlling the current injected into the DFB-SOA, which can implement the fractional-order differentiation. A 60 ps Gaussian pulse is temporally differentiated with a tunable order range from 0.7 to 1.3. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 10/05/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx