A large-scale single-photonics-based optical switching system that occupies an area larger than the maximum area of a standard step-and-repeat lithography reticle is disclosed. The system includes a plurality of identical switch blocks, each of is formed in a different reticle field that no larger than the maximum reticle size. Bus waveguides of laterally adjacent switch blocks are stitched together at lateral interfaces that include a second arrangement of waveguide ports that is common to all lateral interfaces. Bus waveguides of vertically adjacent switch blocks are stitched together at vertical interfaces that include a first arrangement of waveguide ports that is common to all vertical interfaces. In some embodiments, the lateral and vertical interfaces include waveguide ports having waveguide coupling regions that are configured to mitigate optical loss due to stitching error.

An optical circuit switch device and method for using the device are provided. The device may include a fiber array including a set of optical fibers configured for transmitting optical signals. The device may include a collimator array coupled to the fiber array configured for aligning the optical signals received from the fiber array. The device may include a first mirror array for receiving the optical signals from the collimator array. The device may include a second mirror array for receiving the optical signals from the first mirror array. The device may include a lens located at the fiber array, the lens having a focal point at the second mirror array.

An optical scan device includes an optical waveguide array, including a plurality of optical waveguides each of which propagates light along a first direction, that emits a light beam, the plurality of optical waveguides being arranged in a second direction that intersects the first direction, a phase shifter array including a plurality of phase shifters connected separately to each of the plurality of optical waveguides, a control circuit that controls a phase shift amount of each of the plurality of phase shifters and/or inputting of light to each of the plurality of phase shifters and thereby controls a direction and shape of the light beam that is emitted from the optical waveguide array, a photodetector that detects the light beam reflected by a physical object, and a signal processing circuit that generates distance distribution data on the basis of output from the photodetector.

An ultra-broadband silicon waveguide micro-electro-mechanical systems (MEMS) photonic switch is provided, which is mainly composed of three parts: input waveguides, a waveguide crossing with a nano-gap, and output waveguides. The waveguide crossing is composed of two identical orthogonal elliptical cylinders. Four ports of the waveguide crossing respectively extend to form single-mode strip waveguides to serve as input/output waveguides. The center of the waveguide crossing is fully etched with a nano-gap. The two symmetrical port waveguides are fully etched with nano-grooves. The lower cladding near the waveguide crossing and the nano-grooves is penetrated and etched. The width of the nano-gap is adjusted through adjusting a voltage applied across both ends of the waveguide crossing, so that a guided-mode directly passes through or is totally reflected. In the disclosure, a propagation path of the photonic switch is switched through adjusting the voltage applied to the waveguide crossing.

An optical switching device (20) includes a substrate (39) and first and second optical waveguides (23, 25) having respective first and second tapered ends (62, 64), which are fixed on the substrate in mutual proximity one to another. A pair of electrodes (36, 38) is disposed on the substrate with a gap therebetween. A cantilever beam (32) is disposed on the substrate within the gap and configured to deflect transversely between first and second positions within the gap in response to a potential applied between the electrodes. A third optical waveguide (21) is mounted on the cantilever beam and has a third tapered end (60) disposed between the first and second tapered ends of the first and second waveguides, so that the third tapered end is in proximity with the first tapered end when the cantilever beam is in the first position and is in proximity with the second tapered end when the cantilever beam is in the second position.

An integrated tunable waveguide element includes: a cladding. A high k dielectric layer is disposed within the cladding. At least one waveguide is disposed adjacent to the high k dielectric layer. At least one two dimensional monolayer pad is disposed on or in the high k dielectric layer adjacent to a portion of the at least one waveguide. An integrated 2×2 array element is also described.

An electrostatic comb drive-based silicon-based MEMS optical switch and an N×N array. The optical switch is primarily constituted by two parts, namely two separated crossing waveguide mirrors and an electrostatic comb driver. The crossing waveguide mirrors are constituted by two crossing waveguides and four adiabatic tapered waveguides. The electrostatic comb driver comprises an electrostatic comb, an island spring structure, and a transmission rod. The electrostatic comb is a pair of comb teeth structures, a voltage is applied to fixed comb teeth therein, and the other parts remain grounded. Under the effect of an electrostatic force, movable comb teeth move towards the fixed comb teeth, a spring distends and pushes via the transmission rod the movable crossing waveguide mirror to move towards the fixed crossing waveguide mirror, and the separated crossing waveguide mirrors are recombined into a complete crossing waveguide.

Described are methods for configuring computing system for and computing systems for PCIe communication between remote computing assets. The system uses a fabric interface device configured to receive multi-lane serial PCIe data from functional elements of a computing asset through a multi-lane PCIe bus, and to transparently extend the multi-lane PCIe bus by converting the multi-lane PCIe data into a retimed parallel version of the PCIe multi-lane data to be sent on bidirectional data communication paths. The fabric interface device is also configured so that the multi-lane PCIe bus can have a first number of lanes and the bidirectional data communication paths can have a different second number of lanes.

A core selective switch in an optical node device included in a spatial channel optical network includes a spatial demultiplexing unit, an optical switch, and an optical interconnect unit, wherein the spatial demultiplexing unit is an MCF collimator array in which a plurality of MCF collimators each comprising both an MCF having S cores and a collimator lens are two-dimensionally arranged in a plane, the optical switch is a variable reflection angle mirror array in which S variable reflection angle mirrors are two-dimensionally arranged in a plane in a manner similar to a core arrangement in the MCF, the optical interconnect unit is a steering lens, and a beam light output from each core of an input MCF is focused on a variable reflection angle mirror corresponding to the core to be reflected to couple to a corresponding core of a desired output MCF.

Described are various configurations of reduced crosstalk optical switches. Various embodiments can reduce or entirely eliminate crosstalk using a coupler that has a power-splitting ratio that compensates for amplitude imbalance caused by phase modulator attenuation. Some embodiments implement a plurality of phase modulators and couplers as part of a dilated switch network to increase overall bandwidth and further reduce potential for crosstalk.