Multichannel dual-mode pulse generation for DWDM and fiber-wireless system application

In this paper we propose a novel technique for the generation of wideband dual-mode pulses from a single subharmonically synchronous mode-locked laser diode (LD). The obtained pulse source exhibits high extinction ratio (>15 dB) and low timing jitter (<0.5 ps) over all the channels from 1550 to 1564 nm. The proposed scheme is cost-effective and a promising candidate as a pulse source for generation of carrier suppressed return-to-zero (CSRZ) modulation format in dense wavelength division multiplexed (DWDM) systems and optical generation of millimeter-wave frequency signals in multiple channel fiber wireless systems.