Systems and assemblies for providing both cellular and passive optical local area network (POLAN) data signals along a single, shared fiber optic backbone within an in-building network architecture are provided herein. Systems include a headend unit that combines data signals from a cellular network and optical line terminal (OLT) onto the fiber optic backbone, which is then connected to a series of daisy-chained fiber optic assembly units. An example fiber optic assembly unit includes an asymmetric coupler that splits an input fiber optic signal from the fiber optic backbone into an output fiber optic signal and a throughput fiber optic signal that is fed back onto the continuing fiber optic backbone. The output fiber optic signal is filtered into dense wavelength-division multiplexing (DWDM) channels for providing data signals to a wireless or cellular network and further split into multiple passive optical network (PON) outputs for a local area network (LAN).

A dark fiber dense wavelength division multiplexing service path design microservice (ddSPDmS) can provide a scalable self-contained meta-data driven approach for a flexible implementation of a dark fiber dense wavelength division multiplexing (DWDM) service path design solution. The service plan design solution can be used as a standalone solution or integrated with a network management application. In order to manage a large volume of circuit designs, multiple microservices can accept application program interface (API) requests in a cloud environment. Permission can then be given to any application to use the API to make a call to the design and inventory. Additionally, metadata templates can be designed to support a node, a link, and/or a topology for the microservices.

A method for establishing a data model and an apparatus, where a network element may create an optical signal group that includes optical signals with different wavelengths. After selecting a first optical signal group and obtaining first data of the first optical signal group, the network element may reflect, based on a first model established based on the first data of the first optical signal group, a noise coefficient and a gain that are obtained after an optical signal in the optical signal group of different wavelength combinations passes through the network element.

A system for dispersion compensation for a fibered communication path, the system being configured for connection with a node of the fibered communication path. The system includes a controller; a wavelength selective switch (WSS) communicatively coupled to the controller, the WSS being configured for operatively coupling to at least one fiber of the fibered communication path; and dispersion compensation modules (DCM) optically connected to the WSS. Each DCM is configured to provide a particular compensation for dispersion in light received therein, the controller being configured to determine, for each wavelength received from the at least one fiber, an accumulated dispersion, and cause, for each wavelength received from the at least one fiber, the WSS to send each wavelength to a particular one of the plurality of DCMs having the particular compensation corresponding to the accumulated dispersion of each wavelength.

Systems and methods for controlling network configurations or assignments are provided. A method, according to one implementation, includes a step of calculating transmission characteristics between each pair of a plurality of pairs of modems at opposite ends of a Dense Wavelength-Division Multiplexing (DWDM) transport link using specifications of the modems measured during production. The method also includes the step of selecting a pair of modems from the plurality of pairs of modems based on results obtained by calculating the transmission characteristics and based on one or more user-defined service requests.

An example system includes an optical gateway, plurality of hub transceivers, and a plurality of edge transceivers. The optical gateway is operable to receive a plurality of signals from an optical communications network at a plurality of ports of the optical gateway, where each port of the optical gateway comprises one or more respective photodiodes. Further, the optical gateway is operable to determine, for each port, a respective link of the optical communications network communicatively coupling the port with at least one hub transceiver of the plurality of hub transceivers or with at least one edge transceiver of the plurality of edge transceivers, and an identity of the at least one hub transceiver or the at least one edge transceiver.

A method for channel management in an optical network unit includes receiving a disable channel action message sent by an optical line terminal, wherein the disable channel action message is used to instruct disabling a first channel of the optical network unit; transferring the state machine of the optical network unit on the first channel from the association substate of the operation state to the pending substate according to the disable channel action message; and turning off the transmitter and/or the receiver on the first channel after a specified time is reached, transferring the state machine from the pending substate of the operation state to the disabling channel status, and starting a timer.

Embodiments of the present disclosure provide an optical signal transmission method, apparatus, and device. The method at a first device side comprises: n first colored optical modules respectively transmit optical signals with the frequency being f and the wavelengths respectively being λ1-λn, wherein λ1-λn are different from each other; and in-band optical layer operation, administration, and maintenance (0AM) information with the modulation frequency being k1-kn is separately superimposed on the optical signals with the wavelengths respectively being λ1-λn.

Systems and methods of optical restoration include, with a photonic service (14), in an optical network (10, 100), operating between two nodes (A, Z) via an associated optical modem (40) at each node, wherein each modem (40) is capable of supporting variable capacity, C.sub.1, C.sub.2, . . . , C.sub.N where C.sub.1>C.sub.2> . . . >C.sub.N, detecting a fault (16) on a home route of the photonic service (14) while the photonic service (14) operates at a home route capacity C.sub.H, C.sub.H is one of C.sub.1, C.sub.2, . . . , C.sub.N−1; downshifting the photonic service (14) to a restoration route capacity C.sub.R, C.sub.R is one of C.sub.2, C.sub.3 . . . , C.sub.N and C.sub.R<C.sub.H; switching the photonic service (14) from the home route to a restoration route (18) while the photonic service (14) operates at a restoration route capacity C.sub.R; and monitoring the photonic service (14) and copropagating photonic services during operation on the restoration route (18) at the restoration route capacity C.sub.R for an upshift of the photonic service (14).

A method for generating frequency converted laser radiation is disclosed. The disclosure provides a method enabling generation of a frequency converted wavelength division multiplexed light source that is easy to implement at low cost. Adjustment of the center frequency and the mode spacing in a frequency converted wavelength division multiplexed light source is also disclosed. A related method of use discloses generating pump laser radiation through combination of multiple pump sources in a wavelength division multiplexed arrangement; passing the pump laser radiation through the non-linear medium of a singly resonant, single-frequency optical parametric oscillator, wherein the pump laser radiation is continuous wave or pulsed, wherein the pulse duration in the latter case is longer than the time the optical parametric oscillation requires to reach its steady state; and coupling out the non-resonant idler or signal laser radiation from the optical parametric oscillator as usable frequency converted laser radiation. Moreover, the invention relates to a laser device for carrying out the method of the invention.