Generation of DPSK signals using a directly modulated passive feedback laser

The generation of DPSK signals is demonstrated using a directly modulated passive feedback laser at 10.709, 14 and 16 Gb/s. The quality of the DPSK signals was assessed using both noncoherent detection (10.709 Gb/s) and coherent detection with digital signal processing involving a look-up table pattern-dependent distortion compensation scheme.