Abstract: A diffractive pigment includes diffractive pigment, includes a stack including alternating layers of a high refractive index layer and a low refractive index layer, in which the high refractive index layer is a composition including an organic material and high refractive index inorganic nanoparticles; in which at least one layer of the stack is embossed. A method of making a diffractive pigment is also disclosed.

Abstract: An optical filter includes a first mirror that has a first uniform thickness, a second mirror that has a second uniform thickness, and a spacer that is positioned between the first mirror and the second mirror. The spacer has a variable thickness along a first axis of the optical filter. In some implementations, a thickness profile of the spacer, along the first axis, includes one or more portions that have a non-linear slope with an absolute value that is greater than zero.

Abstract: In some examples, fiber optic cable location may include transmitting a coherent laser pulse into a device under test (DUT). Based on an analysis of reflected light resulting from the transmitted coherent laser pulse, changes in intensity of the reflected light caused by a plurality of signals directed towards the DUT may be determined. Further, based on the changes in intensity of the reflected light, a location of the DUT may be determined.

Abstract: A method for providing tests and measurements using a transceiver is disclosed. In some examples, the method may involve using, at least one test instrument and at least one transceiver, to perform tests and measurements at a testing point in a network. The tests and measurements may include at least one of: (1) channel or wavelength and data measurements; (2) insertion loss and optical power measurements; or (3) bit error rate (BER) measurements.

Abstract: In some examples, dual-end loopback-based multi-fiber cable measurement may include connecting at least two multi-fiber loopback devices respectively to a near end and a far end of a multi-fiber cable to place at least two fibers of the multi-fiber cable in series. The at least two multi-fiber loopback devices may include a near-end multi-fiber loopback device connected to a fiber optic reflectometer and to the near end of the multi-fiber cable to connect together at least two near-end fibers of the multi-fiber cable. Further, the at least two multi-fiber loopback devices may include a far-end multi-fiber loopback device connected to the far end of the multi-fiber cable to connect together at least two far-end fibers of the multi-fiber cable.

Abstract: In some implementations, an integrated circuit may receive a read command associated with a data structure of the integrated circuit. The integrated circuit may determine that requested data, of the data structure and associated with an element within the data structure, is not ready for reading. The integrated circuit may output, based on determining that the requested data is not ready for reading, generated delay data. The integrated circuit may determine that the requested data, of the data structure and associated with the element, is ready for reading. The integrated circuit may output, based on determining that the data is ready for reading, the requested data.

Abstract: A microscope may receive a fiber optic connector via a connector adapter of the microscope, wherein the connector adapter includes an opening and a shaped reflective surface surrounding the opening. The microscope may align a ferrule of the fiber optic connector with the opening of the connector adapter of the microscope, wherein the ferrule includes a ferrule chamfer or a ferrule radius. The microscope may transmit direct light onto the shaped reflective surface and may receive reflected light from the ferrule chamfer or the ferrule radius and with a camera of the microscope.

Abstract: An article including a thin film interference pigment; and a coating including a colored selectively absorbing nanoparticles is disclosed. The article can exhibit a change in hue, lightness, and/or chroma as compared to the thin film interference pigment alone. Methods of making the article are also disclosed.

Abstract: Apparatuses and methods for implementing a real-time Open Radio Access Network (O-RAN) fronthaul analyzer are provided. In one example, a hardware accelerator may receive and timestamp packets in an O-RAN fronthaul packet traffic flow, parse and route the time-stamped packets on different circuit paths to one or more hardware packet analyzers, where the one or more hardware packet analyzers generate analytical timing measurements in real-time using the timestamps on the plural packets. In some examples, the hardware accelerator may include a flow tracker to track packet flows and a parser to parse metadata from packet headers and route individual packets onto appropriate circuit paths. In some examples, the real-time O-RAN fronthaul analyzer may be used for testing an O-RAN fronthaul link for compliance with O-RAN standards.

Abstract: According to examples, an O-RAN FHA may include a packet analyzer including hardware, an impairment generator, and a Parser to receive packet traffic flows outputted by an O-DU) and/or an O-RU. The Parser may parse packets in the received packet traffic flows, determine which of the received packet traffic flows are to receive impairments, and set action bits for the packets in the packet traffic flows that are to receive impairments, in which the action bits denote information indicating types of impairments to be applied to certain ones of the packet traffic flows. The Parser may also output the packet traffic flows with the action bits set for the packets to the packet analyzer and the impairment generator, in which the impairment generator is to generate impairments on the packet traffic flows based on settings of the action bits for the packets in the packet traffic flows.

Abstract: Systems, apparatuses, and methods for implementing a real-time Open Radio Access Network (O-RAN) fronthaul analyzer and graphical user interface (FHA/GUI) are provided. In one example, a method describes receiving an O-RAN fronthaul (OFH) packet traffic flow; parsing packet headers of the OFH packet traffic flow; identifying and tracking active flows in the OFH packet traffic flow using the parsing; and presenting a visual representation of the active flows using the tracking of active flows. In some examples, the real-time O-RAN FHA/GUI may be used for testing an OFH link for compliance with the O-RAN standards.

Abstract: In some implementations, a receiver may obtain a digitized output of a radio frequency (RF) analog-to-digital-converter (ADC) of the receiver. The receiver may apply a spur cancellation to the digitized output of the RF ADC to attenuate one or more continuous wave spurs from the digitized output of the RF ADC, wherein the spur cancellation is based on a frequency planning with coherent averaging.

Abstract: A method, apparatus and system for determining and mapping potential net service impairments using multiple datasets associated with a network.

Abstract: Systems, apparatuses, and methods for implementing a real-time Open Radio Access Network (O-RAN) fronthaul analyzer and graphical user interface (FHA/GUI) are provided. In one example, a method describes receiving an O-RAN fronthaul (OFH) packet traffic flow; parsing packet headers of the OFH packet traffic flow; identifying and tracking active flows in the OFH packet traffic flow using the parsing; and presenting a visual representation of the active flows using the tracking of active flows. In some examples, the real-time O-RAN FHA/GUI may be used for testing an OFH link for compliance with the O-RAN standards.

Abstract: A test device determines a Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network. The test device includes a GNSS receiver. The GNSS receiver is connected at different times to a reference GSDS with a known signal propagation delay and to a device under test (DUT), including a second GSDS having an unknown signal propagation delay.

Abstract: There is described a method of estimating one or more properties of traffic passing along segments of a road network, the traffic comprising a plurality of vehicles. The method comprises receiving, from a radio navigation receiver located at each vehicle of a subset of the vehicles, one or more first properties of each of those vehicles. The method also comprises using distributed acoustic sensing to generate, as a function of time and of position along a subset of the segments of the road network, signals representing acoustic vibration caused by the traffic at one or more sensing optical fibres that extend along the subset of segments.

Abstract: A diffuser is disclosed. A system comprising a light source and a diffuser is disclosed. The light source is aligned with a microlens of the diffuser in a static configuration. A method of reducing speckle with the system is also disclosed.

Abstract: A flake including a layer of a diamagnetic material; and at least one additional layer is disclosed. The flake, such as a plurality of flakes, can be dispersed in a liquid medium to form a composition. The composition can be applied to a surface of a substrate to form a security device. A method of making the security device is also disclosed.

Abstract: In some examples, QR code based test data embedding and transmission may include obtaining, by a test data analyzer that is executed by at least one hardware processor, test data based on operation of a test device to measure a parameter associated with an optical fiber. Based on an analysis of the test data, a report that includes the test data may be generated. A quick response (QR) code generator that is executed by the at least one hardware processor may compress the report that includes the test data to generate a compressed report. The QR code generator may generate, based on an analysis of the compressed report, a QR code that includes the compressed report. A display generator that is executed by the at least one hardware processor may generate a display of the QR code that includes the compressed report.

Abstract: An optical sensor device includes an optical sensor; an optical filter; a phase mask configured to distribute a plurality of light beams associated with a subject in an encoded pattern; a movement component configured to move the phase mask; and one or more processors configured to: obtain, from the optical sensor, a first set of sensor data that indicates information related to first light that originates at the subject and passes through the phase mask when the phase mask is located at a first position; obtain, from the optical sensor, a second set of sensor data that indicates information related to second light that originates at the subject and passes through the phase mask when the phase mask is located at a second position; determine and provide, based on the first set of sensor data and the second set of sensor data, information associated with the subject.