Research On Nonlinear Dynamics And Applications Of Optically Injected Semiconductor Laser

The semiconductor laser subject to optical injection can oscillate in many complex nonlinear dynamical states, such as period-one oscillation, period-two oscillation and chaos etc. It is very useful to investigate these dynamics for revealing the physical mechanism of the nonlinear phenomena, and for developing its applicationsIn this dissertation, the nonlinear dynamics of optically injected semiconductor laser and its applications are investigated both in numerical simulations and experiments.â‘ We numerically investigate the dependency of the nonlinear periond-one oscillation and chaos in optically injected semiconductor laser on the kinds of parameters, and identify the mechanism of the chaos bandwidth enhancement in optically injected semiconductor laser with optical feedback. The results can help us developing applications of the nonlinear dynamics.â‘¡We propose and demonstrate experimentally the generation of multi-wavelength broadband chaotic laser using dual-wavelength injection Fabry-Perot laser diode with optical feedback. If the broadband chaotic laser is used, the bit rates and capacity of chaotic optical communications, the resolution of chaotic lidar, and the bit rates of random number should be improved. And the multi-wavlength chaotic laser can be used in chaotic optical WDM system.â‘¢We propose and experimentally demonstrate all-optical frequency division and all-optical wavelength conversion using an optically injected Fabry-Perot laser diode based on the nonlinear dynamical period-one oscillation, respectively. This all-optical clock frequency division method can be used to generate the local base rate optical clock for the all-optical demultiplexing in the OTDM system. And the all-optical wavelength conversion approach has the ability to obtain wavelength converted optical clock with frequency division in the WDM system mixed with OTDM. Moreover, all-optical pulses repetition rates divider is demonstrated. It is believed that this divider has potential application in optical sampling system and photonic analog-to-digital converter.â‘£Based on the nonlinear dynamics of the chaotic laser, the UWB signals with tunable central frequency and controllable bandwidth are generated in experiments. This technique has potential application in future chaotic UWB-over-fiber access networks due to its flexibility in control of the generated UWB signal spectrum.The major innovations in the works:1. Generation of broadband chaotic laser using dual-wavelength injection Fabry-Perot laser diode with optical feedback is proposed and demonstrated. The chaotic laser with bandwidth exceeding 30 GHz is obtained in experiments.2. We propose and demonstrate a novel technique using a Fabry-Perot laser diode as the frequency divider to perform all-optical clock division based on the phase locking of period-one oscillation, and obtain divide-by-two, -three and -four all-optical clock frequency division.3. All-optical wavelength conversion based on the nonlinear period-one oscillation and cross-gain modulation effect of an optical injection semiconductor laser for WDM mixed OTDM communication system is proposed and experimentally demonstrated4. An approach to generation of ultrawideband (UWB) signals based on the nonlinear dynamics of an optically injected semiconductor laser with optical feedback is proposed, and a simple photonic UWB signal generator is demonstrated in experiments.