8 results about "Wdm transmission systems" patented technology

The utility model provides a dense wavelength division multiplexing transmission system capable of expanding O-band wavelength signals, which comprises a first main circuit and a second main circuit which can mutually transmit optical signals, the first main circuit comprises a first array waveguide grating module, one side of the first array waveguide grating module is in butt joint with a plurality of first main circuit optical modules, and the other side of the first main circuit optical modules is in butt joint with a plurality of second main circuit optical modules. The other side of the first array waveguide grating module is sequentially connected with a first filter and a dispersion compensation module, a first amplifier is further arranged between the first array waveguide grating module and the first filter, one side of the dispersion compensation module is in butt joint with a first expansion port, and the first expansion port is connected with a first expansion branch. Compared with the prior art, the system has the advantages that the C band DWDM optical module is directly adopted in the main line, signal conversion does not depend on the Muxponder, the transmission rate of each channel can be increased to 100 Gbps or above, O band wavelength signals are also combined into the main line for long-distance transmission, and the ever-increasing communication requirements are met.

The present application discloses a multiplexing / demultiplexing system, a port configuration method, an apparatus and a computer-readable storage medium, which relate to the technical field of wavelength division multiplexing and are used to improve the transmission efficiency of a transmission system using wavelength division multiplexing. The multiplexing / demultiplexing system includes: a multiplexing unit, which is configured to multiplex N first signal light waves respectively input through N multiplexing ports one by one, and output the target signal light wave obtained by multiplexing through a light wave output port; a demultiplexing unit, which is configured to demultiplex the target signal light wave received through a light wave input port to obtain N second signal light waves; each of the N second signal light waves corresponds to one first signal light wave; a control unit, which is configured to configure the wavelengths of the signal light waves that can pass through the N demultiplexing ports according to the wavelengths of the N first signal light waves, and respectively control each second signal light wave to be output through a demultiplexing port with a matching wavelength; N is a positive integer greater than 1.

A frequency shift correction device (100-1) for an all-optical wavelength converter (12) provided in an optical cross-connect device (10) of a wavelength multiplexing transmission system (1000) comprises: a detection unit (105) that, when the frequency of idler light, which is wavelength conversion light, is determined from the frequencies of incident signal light and excitation light, detects the frequency shift of the excitation light; and a correction unit (150) that corrects the detected frequency shift of the excitation light. The correction unit (150) performs a setting by shifting from a set excitation light frequency by the detected frequency shift Δf, or by half Δf / 2 of the detected frequency shift Δf.

The present disclosure relates to multi-channel optical transmitters and apparatuses in WDM transmission systems. A GT etalon-based dispersion compensator is disclosed that can be utilized in combination with a wavelength division multiplexer at the transmitter location to provide a degree of pre-compensation for signals operating at wavelengths known to experience dispersion between the transmitter and receiver locations. The GT etalon-based dispersion compensator utilizes a separate dispersion compensator configured as a transmissive device by using a polarization beam splitter, a GT etalon, and a pair of quarter-wave plates in a manner such that the output signal path remains collinear with the input signal path and also preserves the linear polarization state of the propagating signal. Multiple of these transmissive dispersion compensators can be cascaded in a back-to-back arrangement within the signal path of a particular channel to provide a greater degree of pre-compensation for wavelengths known to be more susceptible to dispersion compensation.

An optical transmission design device (100) disclosed herein comprises: a noise characteristic information acquisition unit (110) that acquires noise characteristic information of an optical transmission device; an OSNR deterioration amount calculation unit (120) that uses the noise characteristic information, acquired by the noise characteristic information acquisition unit (110), to calculate the amount of optical signal-to-noise ratio deterioration that occurs when an optical signal passes through the optical transmission device; a nonlinear waveform distortion calculation unit (130) that calculates the nonlinear waveform distortion of an optical transmission path; and a transmission reachability evaluation unit (140) that compares a value obtained by subtracting the nonlinear waveform distortion from the amount of optical signal-to-noise ratio deterioration calculated by the OSNR deterioration amount calculation unit (120) with the performance of a single optical transmission / reception device (30) to evaluate the transmission reachability of a wavelength multiplex transmission system (1000).

An optical communication device processes a WDM signal in a WDM transmission system that uses a first wavelength band and a second wavelength band. A wavelength filter extracts a first WDM signal allocated in the first wavelength band and a second WDM signal allocated in the second wavelength band from a WDM signal received from first node. An optical signal branched from the first WDM signal is guided to an access network and a remaining optical signal that is not branched from the first WDM signal is guided to second node. An optical signal branched from the second WDM signal is guided to the access network via a wavelength converter and a remaining optical signal that is not branched from the second WDM signal is guided to the second node. The wavelength converter converts wavelengths from the second wavelength band to a third wave length band.

A method and an apparatus for controlling an optical fiber amplifier, a system, a transmission node and a storage medium. WDM transmission systems are deployed between a first communication end and a second communication end. At least one target WDM transmission system includes a first transmission node and a second transmission node. The first transmission node receives a first control signal including an identifier of the second transmission node, and switches on a transmit-end optical fiber amplifier of the first transmission node if determining that the first control signal is a normal control signal and the second transmission node identifier matches a pre-stored first reference node identifier. The second transmission node receives a second control signal including an identifier of the first transmission node, and performs a similar judgment to switch on a transmit-end optical fiber amplifier of the second transmission node.

This invention provides a link power control method and system for a coherent optical wavelength division multiplexing (WDM) transmission system, comprising: building a coherent optical WDM transmission simulation system; configuring the transmit power of each channel in the WDM system; using the initial state of the transmit power as input to an execution neural network to obtain adjustment values ​​for the transmit power of different channels, and calculating the channel transmit power using the initial state and the transmit power adjustment values; configuring the attenuation of each channel of the wavelength selection switch in the WDM system; using the initial state of the wavelength selection switch as input to an execution neural network to obtain adjustment values ​​for the attenuation of the wavelength selection switch, and calculating the channel transmit power using the initial state and the attenuation adjustment values. This invention is based on a deep reinforcement learning algorithm, and by adjusting the transmit power of different channels in the coherent optical WDM system and the attenuation of different channels in the wavelength selection switch, it achieves optimized power configuration in the link, thereby optimizing the communication quality of each channel at the receiving end after transmission.