High-extinction ratio and low-loss silica-based 8×8 strictly nonblocking thermooptic matrix switch

Optical cross connect switch based on tip/tilt micromirrors in a white cell

“…Electrooptic [1], [2] or thermooptic switches [3] typically cascade 2 2 switches for larger numbers of inputs and outputs. For example, a 16 16 thermooptic switch requires 256 individual switches [4]. The waveguide solution is not expected to scale up much more than perhaps a hundred inputs and outputs because the planar two-dimensional (2-D) approach necessarily requires all of the input and outputs to be in a single plane, and the integrated optics circuit substrates can only be so large.…”

Wavelength selective switching for optical bandwidth management

“…A large number of devices and functionalities have been demonstrated on PLCs from basic blockers (1 ϫ 1 WSS) and 2 ϫ 2 WSS [10,52,53] to higher port count WSS [11,16,66] as well as structures incorporating features of both [4,17,19,20,26,53,62]. A review of a range of devices has been given in [18] and [54].…”

“…High levels of integration have been demonstrated with 256 switches on a single PLC chip [26]. If greater isolation or extinction is required, then dilated switch architectures can be used.…”

Multiport optical switches integrated on Si photonics platform

“…Fig. 2(b) shows a double MZ switch configuration [7] that consists of two MZ switches and an intersection. In the bar state, the two MZ switches are simultaneously in the bar state, and each signal from the input port 1 and 2 goes to the output port 1 and 2, respectively.…”