Cisco Technology

An optical module that includes two or more optical connection ports for transmitting optical signals to and from the optical module. The optical module receives a first optical signal through a first optical connection port and transmits a second optical signal through a second optical connection port. The second optical signal is generated based on a modulator in the optical module receiving an electrical signal from a DSP in the optical module.

An optical media converter configured to convert an optical signal with a first modulation scheme to a second optical signal with a second modulation scheme. The optical media converter receives the optical signal and converts the optical signals into electrical signals corresponding to the optical signal with the first modulation scheme. A DSP in the optical media converter modifies the electrical signals to correspond with an optical signal with the second modulation scheme. The optical media converter generates the second optical signal with the second modulation scheme based on the modified electrical signals and transmits the second optical signal out of the optical media converter.

The present disclosure describes an optical array for protecting optical systems. An optical device includes a first optical source, a second optical source, a third optical source, a first switch, a second switch, and a third switch. When the first optical source fails to produce a first optical signal, the third switch directs a second optical signal produced by the third optical source to the first switch and the first switch outputs the second optical signal. When the second optical source fails to produce a third optical signal, the third switch directs the second optical signal produced by the third optical source to the second switch and the second switch outputs the second optical signal.

In one aspect, a method for routing traffic using a multi-tenanted service hub includes: receiving, by the multi-tenanted service hub of a network, a first communication from a first tenant of a shared edge device, where metadata associated with the first communication includes a first source VPN and a service label, determining, by the multi-tenanted service hub, a first tenant ID based on metadata associated with a first tunnel from the shared edge device to the multi-tenanted service hub, querying, by the multi-tenanted service hub, a mapping table using the first source VPN and the first tenant ID to retrieve a device VPN, where the device VPN is a multi-tenanted VPN of the network, and forwarding, by the multi-tenanted service hub, the first communication using the device VPN, where the device VPN corresponds to a service label maps to a service chain.

A tunable laser comprising at least two gain chips configured to generate light and a wavelength selection circuit. The wavelength selection circuit comprising a first waveguide coupled to a first gain chip of the at least two gain chips, a second waveguide coupled to a second gain chip of the at least two gain chips, a first wavelength selective photonic ring resonator optically coupled to the first waveguide, a second wavelength selective photonic ring resonator optically coupled to second waveguide, a third waveguide optically coupled to the first wavelength selective photonic ring resonator and the second wavelength selective photonic ring resonator; and a control circuit. The control circuit is configured to apply a first current to the first gain chip to bias the first gain chip, tune the first wavelength selective photonic ring resonator to a target wavelength, and tune the second wavelength selective ring resonator off-resonance.

An advanced optical device featuring a substrate with a receiver photonic integrated circuit (PIC) and a transimpedance amplifier (TIA) is disclosed. The PIC is mechanically coupled to the substrate, while the TIA is mounted to the substrate and electrically connected to the PIC. One configuration includes a receiver die flip-chip bonded to a TIA die using copper pillar bumps, optimizing space with the PIC having a smaller footprint than the TIA. A fiber array is precisely aligned and attached to the PIC using epoxy bonding, aided by alignment marks indicating spot-size converters (SSCs). The PIC incudes multiple photodetectors and waveguides, enhancing light guidance and conversion. The manufacturing process involves a chip-on-wafer technique, forming a dam for epoxy application, and precise alignment of fiducials to the fiber array. The method also includes molding, forming through-mold vias, and redistributing electrical connections, ensuring efficient signal processing and integration without wire bonding.

In part, in one embodiment the disclosure relates to a laser that includes a laser cavity; an optical gain chip that includes a gain material, the gain material having a gain region, the optical gain chip includes a first waveguide, the first waveguide defines a first section of the laser cavity; an external laser cavity includes a second waveguide, the second waveguide is optically coupled to the first waveguide, the second waveguide defines a second section of the laser cavity; and a DBR ring optically coupled to the second waveguide, the DBR ring includes a loop waveguide optically coupled to the second waveguide and one or more DBR disposed along one or more sections of the loop waveguide, the laser cavity includes the first section of the laser cavity and the external laser cavity; and a PIC that includes the second waveguide and the DBR ring.

In one embodiment, an apparatus includes a substrate comprising a first surface and a second surface opposite to the first surface, an integrated circuit attached to the first surface of the substrate, and a cold plate attached to the second surface of the substrate with an electrical path extending through the cold plate for transmitting power from a power component connected to the cold plate, to the integrated circuit.

In one embodiment, the disclosure relates to an electro-optical device that includes an optical gain chip that includes; a gain material, the gain material having a gain region, the optical gain chip that includes: N gain chip waveguides; a photonic integrated circuit (PIC) that includes a plurality of layers and a plurality of components, wherein the PIC defines M sections; N external laser cavities; P PIC waveguides; and B distributed Bragg reflector (DBR) rings, wherein each of the N external laser cavities is defined by one of the P PIC waveguides and one of the B DBR rings; and N laser cavities, wherein each laser cavity of the N laser cavities comprises one of the N external laser cavities and one of the N gain chip waveguides.

A seamless mobility domain (SMD) is described where a PTK for a wireless device is pre-computed or pre-generated before the client roams from a serving AP to a target AP in the SMD. The pre-computed PTK can be distributed (i.e., pushed) to one or more target APs before the wireless device roams, or the PTK can be stored in a key stored and then retrieved from the key store by a target AP once the wireless device roams to the target AP. In another embodiment, the PMK and/or PTK keys are generated using a SMD identifier, such as a SMD MAC address or a special ID for the SMD.