Systems and methods increase the fan-out (radix) of optical connections that are co-packaged with electric circuits, e.g., Application-Specific Integrated Circuits (ASICs). Optical or electrical techniques are presented to break out multiple data streams from a Photonic Integrated Circuit (PIC) integrated with an ASIC. This provides the ability to increase the I/O capability (radix) of an ASIC, allowing the ASIC to connect to a larger number of devices (e.g., servers). A cross-connect system includes one or more cross-connect devices optically interconnected to 1) a plurality of switches with each switch connected to one or more subtending servers, and 2) a plurality of switch circuits having Photonic Integrated Circuits (PICs) integrated therewith, each of the one or more cross-connect devices is configured to provide fan-out of the plurality of switches between the plurality of switch circuits to increase a number of the subtending servers.

Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network. Accordingly, it would be beneficial for new fiber optic interconnection architectures to address the traditional hierarchical time-division multiplexed (TDM) routing and interconnection and provide reduced latency, increased flexibility, lower cost, lower power consumption, and provide interconnections exploiting N×M×D Gbps photonic interconnects wherein N channels are provided each carrying M wavelength division signals at D Gbps.

An optical circuit that has a first input waveguide, at least a first output waveguide and an optical path between the first input waveguide and the at least a first output waveguide. A first totally internally reflecting (TIR) waveguide switch lies on the optical path between the first input waveguide and the at least a first output waveguide. A wavelength selective filter is disposed on the optical path between the first input waveguide and the at least one output waveguide, the wavelength selective filter being transmissive for light in a first wavelength range and reflective for light in a second wavelength range.

A phase-lock-free system includes a control instruction unit, a low-noise high-gain optical amplifier, an optical switch, a filter, an optical delay interferometer I, an optical delay interferometer Q, a first balanced detector, a second balanced detector, an anti-coding switch unit, a parallel-serial conversion unit, and a data processing unit. The control instruction unit is connected to the optical switch, the anti-coding switch unit, and the parallel-serial conversion unit, respectively; the low-noise high-gain optical amplifier is connected to the optical switch; the optical switch is connected to the first balanced detector and the second balanced detector by means of the filter, the optical delay interferometer I, and the optical delay interferometer Q, respectively. This system improves the compatibility of a communication system at a relay node in an existing laser communication network.

A wavelength-tunable optical filter control apparatus in an optical access system that uses wavelength-multiplexed optical signal of a plurality of wavelength channels includes a wavelength-tunable optical filter configured to pass an optical signal of a specific wavelength channel among the plurality of wavelength channels; a light receiving element configured to convert the optical signal that has passed through the wavelength-tunable optical filter into an electrical signal; a signal quality determining unit configured to determine a quality of the electrical signal; and a wavelength-tunable optical filter control unit configured to acquire a light intensity of the electrical signal and control a wavelength of the wavelength-tunable optical filter based on the acquired light intensity and a determination result of the quality of the electrical signal.

Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network. Accordingly, it would be beneficial for new fiber optic interconnection architectures to address the traditional hierarchal time-division multiplexed (TDM) routing and interconnection and provide reduced latency, increased flexibility, lower cost, lower power consumption, and provide interconnections exploiting NMD Gbps photonic interconnects wherein N channels are provided each carrying M wavelength division signals at D Gbps.

A device may comprise a first portion and a second portion. The first portion may comprise a plurality of slots configured to receive a plurality of fiber optic cables. Each fiber optic cable may be received in a respective slot of the plurality of slots. The second portion may comprise a plurality of protruding members configured to bend the plurality of fiber optic cables, received in the first portion, to cause the plurality of fiber optic cables to emit light. The second portion may further comprise the light detection unit. The light detection unit may be configured to determine whether light emitted by a fiber optic cable is detected; and provide an indication regarding a port of the plurality of ports based on determining that the light, emitted by the fiber optic cable, is detected. The fiber optic cable may be connected to the port.

The invention relates to a fibre-optic cross-connection system; in particular having spine-leaf topology, having an input side (S1, S2), in particular a spine side, which has one or a plurality (n) of input switches (S1, S2), Each input switch (S1, S2) comprises a plurality of fibre-optic multi-channel transceivers (QSFP S1.1-S1.4; QSFP S2.1-S2.4), each of which has a number of k fibre-optic channels (Tx0-Tx3). The fibre-optic cross-connection system also has an output side (L1-L4); in particular a leaf side, which has a plurality (m) of output switches (L1, L2, L3, L4) which each have a plurality of fibre-optic multi-channel transceivers (QSFP L1.1-L1.2; QSFP L2.1-L2.2; QSFP L3.1-L3.2; QSFP L4.1-L4.2). The fibre-optic channels (Tx0-Tx3) of at least one, in particular every, input-side multi-channel transceiver (QSFP S1.1-S1.4; QSFP S2.1-S2.4) are divided and connected to output-side multi-channel transceivers (QSFP L1.1-L1.2; QSFP L2.1-L2.2; QSFP L3.1-L3.2; QSFP L4.1-L4.2) which are different from one another, in particular belonging to different output switches (L1, L2, L3, L4).

An optical network including an input to receive from an optical network light comprising plural wavelength components. An optical wavelength selective filter, optically connected to the input, extracts a first wavelength component of the plural wavelength components from the light, thereby providing a first optical signal including the first wavelength component and a second optical signal including a remainder of the plural wavelength components a light emitter to provide a modulated broadband optical signal. A first output, optically connected to the optical wavelength selective filter, receives a first portion of the second optical signal for transmission to a light detector and a second output, optically connected to optical wavelength selective filter, receives a second portion of the second optical signal for transmission to the optical network.

An apparatus includes a first and second VCSEL, each with an integrated lens. The VCSELs emit a first light beam having first optical modes at first wavelengths and a second light beam having second optical modes at second wavelengths. The apparatus also has an optical block with a first and second surface, a mirror coupled to the second surface, and a wavelength-selective filter coupled to the first surface. The first integrated lens mode matches the first beam to the optical block, and the second integrated lens mode matches the second beam to the optical block such that the first beam and second beam each have substantially a beam waist with a beam waist dimension at the first and second input region, respectively. An exit beam that includes light from the first beam and the second beam is output from the second surface of the optical block.