Transform-based All-optical Wavelength Of Soa And Obpf, Transform And Pattern

As the development of fiber communication system and broadband services, the all-optical networks with the combination of WDM system and OTDM system has become the effective method for improving bandwidth of communication. The bandwidth of communication is limited by electronic bottle-neck. For resolving this problem, all-optical signal proceeding is a attractive method. All-optical wavelength converter and all-optical format converter are key components in designing the future all optical networks. And all optical signal processing based on semiconductor optical amplifier (SOA) has been the focus of research in the world. In this paper, we spread our work in the following aspects:1. The performance of SOA which is the key component in optical signal processing is discussed briefly. The mathematical models are given when CW light or pulses is transmitting in SOA. And the performance of SOA used in experiments is introduced. The spontaneity emission spectrum is obtained at different injected current. And the relation between the central wavelength and the injected current is obtained as well as the relation between the spectrum bandwidth and the injected current.2. The principle and theoretically model of wavelength conversion based on SOA and OBPF is introduced. The effect of the bandwidth of OBPF and the wavelength detuning between OBPF and probe light to inverted wavelength conversion is discussed. The waveform of inverted wavelength conversion is improving obviously when the detuning is about 0.1nm between the central wavelength of 0.3nm bandwidth OBPF and probe light. Using the 0.3nm bandwidth OBPF, wavelength conversion experiment is done both at 10Gbit/s and 40Gbit/s. By tuning OBPF both inverted and non-inverted waveform converted signal can be obtained. Meantime, both up-conversion and down-conversion are realised when the central wavelength of OBPF is at 1560.217nm and 1559.599nm.3. The technology of all-optical format conversion is categorized and a novel scheme using duplicator and wavelength converter based on SOA and OBPF for the implementation of all-optical data format conversion is domentrated. RZ to NRZ all-optical format conversion is achieved at 20Gbit/s experimentally as well as NRZ to RZ all-optical format conversion. For RZ to NRZ format conversion, RZ optical signal of 1.5ps width is converted to NRZ optical signal of 47.66ps width. RZ signal of 14.09ps width is obtained at the NRZ to RZ format conversion experiment. Moreover, the simulation with OptiSystem4.0 emulator is also carried out. It is shown that the simulation and experimental results are consistent with each other. To investigate the effect of format conversion on system capability, BER and transmission tests are done using the simulator.