Multiple-output all-optical header processingtechnique based on two-pulse correlation principle

Abstract

25 ps: respectively. We modulated them with a four-bit pulse pattem by using an electro-optic modulator, and injected into the DIA converter. The output pulses from the DIA converter were gated with an EA modulator at 2.5Gbit/s, and fed into the optical power monitor. The gate width was -lOOps. Figs. 3a and b show an input pulse pattern (0110) and an output waveform from the D/A converter, respectively, which we observed on a sampling oscilloscope. The height of the peak marked by the solid square in Fig. 3b corresponds to the digital-to-analogue converted 01 10 pattems, that we gated with the EA modulator. The inset in Fig. 3b show:; the theoretical output waveform, which agrees well with the measured waveform. Conclusion:We have demonstrated a novel pulse pattem recognition circuit based on a PLC DIA converter. Four-bit pulse sequences at IOGbit/s were successfully recognised in the optical stage. This approach is promising for future packet-switched photonic networks.

Applications of Saturable Absorption-based Nonlinear Vertical-Cavity Semiconductor Devices for All-Optical Signal Processing

“…In PPC an optical header is uniquely defined by the time distance between two on-off-keying (OOK) modulated pulses. PPC allows simple header recognition by using a self-correlation technique which does not need generation of header reference patterns in the header recognition block (Calabretta et al, 2001). Another useful functionality for OPS networks is all-optical seed pulse extraction (AO-SPE) from the incoming packets, which is needed for synchronization of different inputs of a switch node in time-slotted operation.…”

All fiber-optic neural network using coupled SOA based ring lasers

“…Current demonstrations of all-optical address recognition have address lengths of approximately four bits [28]. Even if the address is larger, only a limited number of special patterns can be used [29], [30]. Furthermore, the current methods do not provide very high contrast in the output decisions.…”

Simulation of All-Optical Routing Employing PPM-based Header Processing in Photonic Packet Switched Core Network

“…In recent years, we have seen a growing research activities in all-optical processing and switching in routing in WDM and OTDM networks [3][4][5][6], and being shaped by emergence of new materials and switching structures. A number of alloptical header processing and switching schemes have been developed such as all-optical self-routing [7], all-optical bypass router [8] and all-optical label swapping [9,10].…”