10 results about "Optical packet" patented technology

The invention provides a bolt surface defect detection method and equipment. The method comprises the following steps: constructing a bolt surface defect detection test bed; bolt defect images in the manufacturing process are collected; marking the bolt defect image, enhancing the marked bolt defect image to obtain a data set, and dividing the data set into a training set and a test set; the method comprises the following steps: constructing an optical packet network LightPGNet, defining a double-discriminator condition space-semantic feature fusion architecture, selecting a distance intersection-to-union ratio DIOU to replace a generalized intersection-to-union ratio GIoU as a loss function of bounding box regression, and obtaining a bolt surface defect detection model according to transfer learning; adopting the training set to train the bolt surface defect detection model; and testing the trained bolt surface defect detection model by adopting the test set, and taking the accuracy rate, the recall rate, the average precision mean value, the frame number per second, the category average precision and the floating point operation times per billion per second as evaluation indexes.

The present invention discloses an optical access network architecture for a distributed edge data center based on asynchronous optical packet switching, belonging to the field of optical access networks. The data access end modulates the uplink signal to be processed to a preset wavelength and transmits the uplink signal to be processed by using a wavelength division multiplexer with multiple wavelengths; the HEM packet header extraction module separates the optical packet header and the payload from the access signal; the optical line terminal analyzes the optical packet header to obtain the target address and priority information of each signal to be processed; the delay optical fiber caches the payload of each signal to be processed; the optical switching matrix determines the switching state of the optical switching matrix according to the target address of each signal to be processed, and transmits the payload of each signal to be processed to the target address according to the priority information. The optical access network architecture of the present invention can realize the random access of a large number of terminal user burst services, improve the scalability of the system, and can solve the problem of wavelength conflict caused by two or more burst tasks at the same time.

Consistent with some disclosed embodiments, an optical switch includes: a scheduler; and a buffer for buffering an optical packet including, arranged in a circuit, a clock generator for generating a clock signal, an optical unbalanced Mach Zehnder Interferometer (MZI) and a fiber delay line (FDL) having an FDL length, wherein the optical packet has an optical packet signal, wherein the scheduler is configured to insert the optical packet into the buffer and to determine a number of circulations of the optical packet through the circuit, wherein the MZI modulates the clock signal based on the optical packet signal to create a reshaped optical packet after each circulation of the optical packet through the circuit, and wherein the FDL introduces a delay in the optical packet proportional to the FDL length.

A distributed optical fiber sensing and transmission method and system based on optical grouping integrates the concepts of signal frames and signal elements in the communication field into the sensing field. Each measurement signal frame contains several measurement signal elements to achieve full-fiber scanning. Each measurement signal element contains a pair of time-coded pump light pulses and rectangular square wave detection light. The two are injected into the optical fiber in the same direction. After the detection light is reflected at the end of the optical fiber, it meets the pump light in the opposite direction, generating a scattered signal. Analysis of this signal can achieve the measurement of the encounter point. Because the pulse square wave time intervals in each measurement signal element are different, the constructed measurement signal frame can cover all measurement points on the optical fiber, thereby achieving the goal of full-fiber distributed measurement. The present invention avoids the pump light emptying effect and non-local effect, and can complete the measurement of all points at once while ensuring resolution (spatial resolution and measurement accuracy), taking into account both resolution and time efficiency.

This application discloses an optical Baotou identification system, integrated chip, and identification method. The system comprises an input layer, an optical reservoir module, and an output layer, connected in sequence. The optical reservoir module comprises a plurality of reservoir nodes connected in a predetermined manner, each of which includes a microring resonator. This application employs microring resonators as reservoir nodes, which act as a time delay. This system features low power consumption, a small footprint, and stable operation, enabling on-chip integration of the optical Baotou identification system and increasing its flexibility.

This invention relates to the field of communication technology, specifically to an optical tag switching system and method based on novel code shift keying (CPS) tag overlay. The system includes: a CPS signal loading module for loading a CPS tag signal onto a clock signal to generate a tag clock signal, and outputting the tag clock signal to a modulation module; a payload signal loading module for generating a payload signal and outputting the payload signal to the modulation module; a modulation module for overlaying the tag clock signal output by the CPS signal loading module onto the payload signal output by the payload signal loading module, using the overlaid optical packet signal to modulate the optical carrier, generating a combined signal, and outputting the combined signal; and a demodulation module for demodulating the combined signal output by the modulation module to recover the CPS tag signal and the payload signal. The beneficial technical effects of this invention include: improving the coding efficiency during tag overlay in optical tag switching.

The invention relates to the technical field of optical cable cross-connecting boxes, and aims to solve the technical problems of bulkiness and large occupied space. In order to solve the technical problem, the invention provides the small portable barrel-shaped jumper-connection-free optical cable cross-connecting box. The device comprises a base and a barrel-shaped structure, a first cavity is formed in the bottom of the base, a second cavity is formed in the top of the base, and a partition is arranged on the base; the shell is of a barrel-shaped structure; the shell is in butt joint with the top of the base to form a sealed second cavity; the connecting assembly is located in the second cavity and connected with the base; the connecting assembly comprises a first support and a second support which are arranged back to back. The welding assembly is connected to the first bracket; the welding assembly comprises an optical cable fixing plate and an optical fiber welding disc; a wiring terminal assembly including an adapter; the adapter is vertically connected to the second bracket; the optical subassembly is connected to the top of the first bracket or the second bracket; and the optical sub-assembly comprises a PLC (Programmable Logic Controller) optical splitter. The device is small in occupied space, smaller and smaller, and reduces the mistaken touch risk.

The present invention relates to a task scheduling method for an edge data center based on optical interconnection. Based on a distributed edge data system, task scheduling is performed for each received optical packet task. The entire scheduling process can reduce the transmission bottleneck of electrical signals on high-speed data, and has the advantages of supporting bursty services, low latency, high bandwidth utilization, and large throughput, which is in line with the characteristics of large data volume and low latency in edge computing; placing a small edge data center at the network edge can transfer the latency-sensitive traffic of the optical transport network to the edge network, while sharing the computing, storage, and network transmission bandwidth pressure of the cloud data center, and can provide users with nearby service resources, thereby reducing the propagation latency of remote transmission to the cloud data center.

The present invention relates to an optical packet switch and an optical packet switching method. The optical packet switch comprises a service aggregator, a wavelength converter, and a switching module. The output of the service aggregator is connected to the input of the wavelength converter, which in turn is connected to the input of the switching module. The service aggregator is configured to aggregate service information belonging to the same wavelength link from different input optical fibers into a single transmission link. The wavelength converter is configured to perform wavelength conversion on the service information aggregated into the single transmission link to obtain service information of different wavelengths. The switching module is configured to perform service information exchange processing on the service information of different wavelengths. This invention can reduce the structural complexity of the optical packet switch and reduce the physical size of the optical packet switch.

Methods and nodes including a hub node of a passive optical network (PON) comprising a DSP chain configured to: receive a signal burst from a leaf node in the PON, the signal burst having a frame comprising a payload and a frame header, the frame header comprising a clock-and-gain control section, a frame detection section, and an equalizer section; acquire a leaf node clock phase from the clock-and-gain control section of the frame header; estimate signal power of a signal burst from the leaf node in the PON; compensate for differences in the signal power of the signal burst from the leaf node; detect a Frame-Alignment-Sequence indicating arrival of the signal burst; determine MIMO polarization filter coefficients from the Frame-Alignment-Sequence; align a phase between X-Polarization and Y-Polarization of the signal burst using the MIMO polarization filter coefficients; and determine a local oscillator signal Frequency Offset Estimate (FOE).