Simultaneous all-optical individual channel clock extraction and wavelength conversion using an optically injected Fabry-Perot laser diode

We propose and demonstrate a novel technique that uses a Fabry-Perot laser diode (FP-LD) to perform simultaneous all-optical individual channel clock extraction and wavelength conversion. The nonlinear dynamical period-1 oscillation can occur when a Semiconductor laser is optically injected. By utilizing the cross-gain :modulation effect and the period-1 oscillation. harmonic frequency-locked in an optically injected semiconductor laser, we can extract the wavelength conversional individual channel optical clock from the optical-time-division-multiplexing (OTDM) signal. In a FP-LD, we numerically simulate the extraction of 20 GHz optical clock at 1550 nm from the 2 x 20 Gb/s OTDM signal at 1555 nm, and experimentally obtain the 105 dBc/Hz phase noise frequency division clock of 12.36 GHz to 6.18 GHz with simultaneous wavelength conversion front 1550.24 ran to 1545.91 nm. Moreover, we investigate the influence of the injection optical power level, wavelength detuning, the FP-LD's bias current level and the longitudinal mode selection on the optical clock extraction. This method is potential to technologically apply in the all-optical demultiplexing and wavelength routing in the OTDM mixed wavelength-division-multiplexing (WDM) communication system.