40 Gbit/s all-optical XOR using a fiber-based folded ultrafast nonlinear interferometer

Method of implementation of frequency encoded all optical half adder, half subtractor and full adder based on semiconductor optical amplifiers and add drop multiplexers

“…Many schemes have been proposed to realize various digital signal processing in last few years in the optical domain [1][2][3][4][5][6].…”

“…The FWM used in the proposal [16,17] has disadvantage of using polarization controller, tunable filters and high injection current. Beside all of these disadvantages of the earlier proposals [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] they have another draw back common to most of them. Since most of all the proposals utilize intensity encoding in the presence of photon as '1' and absence of photon as '0', they have intensity loss dependent problems.…”

Benefits of label stripping compared to label swapping from the point of node dimensioning

“…Figure 1 shows the AOLS node-architecture proposed by the Lasagne project. The main functionalities such as label reading, label insertion and packet routing are based on the use of all-optical logic gates [8][9][10][11]. These functionalities are performed by the AOLS-block (Fig.…”

200-pass picosecond-pulse transmission through a regenerative recirculating fiber loop

“…A semiconductor-optical-amplifier (SOA) wavelength converter is incorporated into the FUNI to make a wavelengthmaintaining FUNI, which is insensitive to input polarization, stable to environmental changes, outputs a constant polarization, and operates on picosecond pulses. Both devices have been demonstrated before at 40 Gbit/s [2]- [4].…”