Systems, devices, and techniques relating to optical communications are described. A described hub optical module includes an optical transceiver configured to communicate with edge optical modules of respective edge devices via an optical communication network, the edge optical modules comprising edge interfaces; and a controller coupled with the optical transceiver. The controller can be configured to provide, to a hub device, hub interfaces which are configurable to respectively correspond to different optical subcarriers transmitted from and received by the optical transceiver. The controller can advertise, to the hub device, an application select code to enable the hub device to configure an operational mode and to selectively enable each of the hub interfaces in the operational mode, store one or more associations among the hub interfaces and the edge interfaces, and configure one or more cross-connections among the hub interfaces and the optical subcarriers based on the one or more associations.

A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.

A system includes an Alice transmitting terminal, a wavelength division multiplexing (WDM) unit and a plurality of Bob terminals for receiving a plurality of photons of different wavelengths; the Alice terminal is connected with the plurality of Bob terminals by the WDM unit; the Alice terminal includes a multi-wavelength laser generation device, an attenuator, a first polarization beam splitter, a first beam combiner, a phase modulator, a first polarization controller and a second polarization controller; the WDM unit includes a wavelength selection device; each Bob terminal includes a second polarization controller, a third polarization controller, a fourth polarization controller, a third polarization beam splitter, a fourth polarization beam splitter, a second beam combiner, a third beam combiner, a first photon detector, a second photon detector, a third photon detector and a fourth photon detector.

[Problem] In a disaggregated optical transmission system formed by connecting bases including transmission apparatuses having specifications of different vendors through an optical fiber, wavelength information is easily set in the transmission apparatuses at both bases of the optical fiber such that the required wavelength is assigned to the optical fiber.

[Solution] The optical transmission system 30 includes a facility DB 34 that stores at least information on the NW configuration in which a predetermined optical signal wavelength is assigned to the optical fiber 17, a wavelength assignment unit 32f that, if the facility DB 34 stores no information on the same NW configuration as a NW configuration that the wavelength assignment request to the optical fiber 17 between bases has, associates a management number with a wavelength commonly available for different vendors, based on vendor information in which management numbers and wavelengths of vendors are associated, and further if this wavelength is assignable to the optical fiber 17, performs a wavelength assignment instruction by using the management number, and a wavelength setting unit 33 that performs wavelength assignment setting in the transmission apparatuses at both bases of the optical fiber 17 in response to the wavelength assignment instruction.

A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.

An optical transmission apparatus includes the optical transceiver configured to generate a test light for each wavelength assignable to the wavelength multiplex light to transmit the test light to the optical transmission line via the wavelength multiplexer and demultiplexer, detect a reflected light for the test light from the optical transmission line, calculate an arrival distance of the test light for the each wavelength from the reflected light for the each wavelength, and set a wavelength having a longest arrival distance among the arrival distances for the respective wavelengths, as a wavelength to be assigned to the signal light in the optical transceiver.

Disclosed herein is a method of assigning a wavelength to a given light path in a wavelength switched optical network, as well as a corresponding routing engine and computer program. The method comprises the following step. For each of a plurality of possible wavelengths for said light path, retrieving information from an optical performance database (30) allowing to assess whether the given wavelength meets a predetermined feasibility criterion with regard to said given light path; if the given wavelength is found to meet the predetermined feasibility criterion, determining a set of extended feasible light paths, each of which fully including the given light path, but containing one or more additional nodes; and calculating a first score based on said determined set of extended feasible light paths, wherein said method further comprises a step of choosing, based on said first score, a wavelength that has a first score indicating a low suitability for providing useful extended feasible light paths for future use.

An optical transmission apparatus includes a wavelength variable filter whose transmission light wavelength is variable; a receiver that receives light, the light being sent from another optical transmission apparatus and passing through the wavelength variable filter; a transmitter that sends to the another optical transmission apparatus, a utilization permission request for a second wavelength corresponding to a first wavelength of the light received by the receiver, the transmitter sending the utilization permission request as light of the second wavelength and in a form of a tone signal of a predetermined frequency; and a controller that, when receiving from the another optical transmission apparatus, a utilization permission notification of the second wavelength for a sender of the utilization permission request, configures a wavelength of a main signal to the second wavelength, the main signal being sent from the transmitter to the another optical transmission apparatus.

A method (100) for facilitating Optical Supervisory Channel (OSC) communications between a main site and a plurality of remote sites in an optical network is disclosed. The main and remote sites are comprised within a Radio Access Network and the main and remote sites are connected via a point to multipoint optical infrastructure. The method comprises receiving an OSC signal on an OSC from the main site (120), sequentially routing OSC signals on the OSC to each of the remote sites in a daisy chain configuration (140) and returning an OSC signal received on the OSC from a last of the remote sites in the daisy chain configuration to the main site (160), the OSC being transported over the point to multipoint optical infrastructure (170). Also disclosed are a method (500) for performing OSC communications in an optical network, a hub node (300, 400), a remote site node (600, 800) and a system (900) for communications in an optical network.

A system and method for generating, based on optical network topology information, an optical model to represent an optical network; provisioning a new optical connection within the optical network: determining, using the optical model, a first bit error rate (BER) of the new optical connection; determining, using the optical network providing the new optical connection, a second BER of the new optical connection; determining, based on the first and the second BER, a BER excursion parameter of the new optical connection; training a margin allocator based on the BER excursion parameter of the new optical connection, and the first BER of the new optical connection; comparing the first BER of the new connection and a required optical margin to a threshold to determine a reliability of the new optical connection; and allocating, using the margin allocator, the required optical margin for additional optical connections of the optical network.