Hybrid integrated 4×4 optical matrix switch using self-aligned semiconductor optical amplifier gate arrays and silica planar lightwave circuit

All-optical binary counter

“…Reducing the capacities of the memories and hence increasing the count rate will require the time-of-flight latency to be reduced. This should be achievable using integrated SOA based all-optical switches [14-17] and using planar silica interconnects between the switching gates [18]. If the latency can be sufficiently reduced then it may be possible to create truly bit-serial optical delays so that the bitdifferential technique described here would not be required.…”

Photonic Integrated Semiconductor Optical Amplifier Switch Circuits

“…The SOA gates are able to overcome losses associated with the splitter network, allowing zero fiber-to-fiber www.intechopen.com insertion loss at modest currents. Selective area epitaxy has allowed the separate optimisation of active and passive circuit components required for insertion-loss-free operation (Sasaki et al, 1998;Hamamoto & Komatsu, 1995). The splitting and combining functions have been implemented using Y-couplers (e.g.…”

“…Single stage four port switches have been implemented for a number of broadcast and select configurations (Gustavsson et al, 1992;Bachmann et al, 1996;Larsen & Gustavsson, 1997;van Berlo et al, 1995;Sasaki et al, 1998). Electrode counts of between sixteen and twentyfour result, depending on whether additional on-chip amplification is required to overcome circuit losses.…”

Symmetric Mach‐Zehnder‐type all‐optical switches and ultrafast all‐optical signal processing

“…Figure 2 shows a hybrid-integrated SMZ (HI-SMZ) all-optical switch fabricated by the authors [14]. This device was fabricated with the PLC technology by AP-CVD [16]. As the nonlinear optical waveguides, a pair of InGaAsP semiconductor optical amplifiers (SOA) [17] are used.…”