Receiver Module Based On The Light Of The Multiple Optical Orthogonal Code Optical Label

Optical packet switching (OPS) has many advantages such as high bit-rate switching, full transparency on optical packet format, more adaptable to the flexible bandwidth-on-demand, dynamic reconfigurability. It is an effective method of connecting seamlessly the high bit-rate optical transmissions and an important part of all-optical networks. In an OPS system, the optical label carries the routing for the payload. Optical label processing is (OLS) one of the key technologies in OPS and the premise of realizing OPS. We proposed the multiple optical orthogonal codes (MOOC)-based optical label for OPS.Optical labels can be realized using bit-serial label, wavelength labels, sub-carrier labels, orthogonal modulation labels, and optical-code labels. The proposed MOOC for the optical labels by permutation or combination can have more available codes for the optical labels in an OPS network.The experimental set-up for an experiment to demonstrate the proposed MOOC-OPS networks is presented in this paper. The MOOC-OPS composes of three edge nodes and one core nodes.Firstly, the key technologies of the system, optical labels generation, optical labels receiving and the core control unit are studied.The main works of this optical labels receiving unit based on MOOC-OPS are proposed.In the MOOC-OPS system, a special situation is easily occurs that the optical label is an inconsecutive, random and bursting optical label. The principle of traditional optical receiver is studied. Then we conclude from the scheme of optical receiver that it can't work correctly in the MOOC-OPS. And the experiment verifies our conclusion.In the MOOC-OPS, each MOOC–based optical label is encoded by the arrayed optical encoders consisting of 3 independent optical encoders. And in the label receiving unit, the output correlation pulses from all decoder and noises from the correlator are sent into the optical label processing unit and label recognition unit to determine which the MOOC-based optical are. The MOOC-based optical label processing can be performed using a set of passive optical encoders and decoders. The MOOC-based optical label is encoded by the fiber Bragg grating (FBG)-based optical encoder. After the PIN the pulse is convert form optical label into electronic signal. The pulse peak value is 2mv, the duration of the pulse is 2ns. If it is sent directly into the core control unit (FPGA) according the routing table we can get the routing information, the expensive FPGA will be used We design a processing unit consisted with widening net and cascading multi-level amplifiers to processing tiny narrow pulse of optical labels. And by using the widening net and cascading multi-level amplifiers, the high-speed signal could be changed into low-speed signal, avoiding using the expensive wide-band amplifier and high-speed ADC. The output of buffering network could be directly used for the data processing by low-bandwidth amplifier and low-speed ADC (Analogue-to-Digital Converters). The label recognition unit is used to sample and judge the label validity.In this thesis, an MOOC-based all-optical label receiving scheme is experimented, in which labels velocity is 500 MHz and payloads velocity is 1.28 GB /s. The results shown in this thesis prove the scheme is feasible.