Abstract: A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber/power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber/power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (PoE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber/power cable and the PoE-compatible connection.

Abstract: An optical transmitter includes an optical modulator, a tunable optical filter, a temperature sensor, and a processor. The tunable optical filter is provided on an output side of the optical modulator and transmits light of a frequency corresponding to a control voltage. The temperature sensor detects a temperature around the tunable optical filter. The processor detects an optical loss occurring in the tunable optical filter, calculates a width of a range of the control voltage in which the detected optical loss is smaller than a specified threshold, adjusts the control voltage based on the temperature detected by the temperature sensor, and shifts the control voltage by a specified amount that is larger than zero and smaller than or equal to a half of the calculated width of the range when the optical loss is larger than or equal to the threshold.

Abstract: The present disclosure relates to a telecommunications enclosure having cable ports and an internal optical tapping or indexing architecture. The cable ports can be defined by hardened fiber optic adapters.

Abstract: This optical fiber cable is a central-core-type cable in which slotted rods are not used, and is composed of a core, a wrapper, a tension member, a ripcord, a sheath, and the like. The core is formed by twisting together a plurality of optical fiber units without back-twisting. The optical fiber units are formed by twisting together a plurality of intermittently-fixed optical fiber ribbons. A direction in which the optical fiber ribbons are twisted together is same as a direction in which the optical fiber units are twisted together.

Abstract: Disclosed is a photodetector with a resonant waveguide structure, including: a substrate; a light absorption layer located on the substrate and configured for detecting an optical signal; a resonant waveguide structure including a first waveguide portion and a second waveguide portion spaced apart; the first waveguide portion receives the optical signal and transmits the received optical signal to a first region of the second waveguide portion, the second waveguide portion includes a second region for coupling the optical signal to the light absorption layer, and the second waveguide portion provides a circular transmission path for transmission of the optical signal to transmit the optical signal that transmitted to the first region to the second region along part of the circular transmission path and retransmit the optical signal that flows through the second region without being coupled to the light absorption layer to the second region along the circular transmission path.

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: This disclosure provides a method of receiving a plurality of data streams at an electromagnetic field receiver in a wireless telecommunications network, the method including obtaining data indicating detection of a first electromagnetic field incident at a transmission medium during a timeslot of a first subset of a plurality of timeslots; associating the detected first electromagnetic field with a first data stream of a plurality of data streams; obtaining data indicating detection of a second electromagnetic field incident at the transmission medium during a timeslot of a second subset of the plurality of timeslots; and associating the detected second electromagnetic field with a second data stream of the plurality of data streams.

Abstract: A cable with a connector includes a plurality of multicore optical fibers and a plurality of connectors attached to ends of the plurality of multicore optical fibers. The connectors are multi-fiber connectors, and a core number density of each of the plurality of connectors is 2 cores/mm2 or more. The cable further includes a sheath that collectively covers the plurality of multicore optical fibers.

Abstract: An electro-optical conversion system including an opto-mechanical conversion device which includes a ring cavity formed by an optical waveguide which extends along an annular closed curve, a micromechanical resonator that comprises at least one microbeam, and a zipper type element integrated into the ring cavity, the zipper type element including a first arm made on a portion of the ring waveguide and a second arm made on the microbeam. The conversion system also includes a capacitor with first and second electrodes separated by a gap which varies when the microbeam oscillates.

Abstract: A dual port switching apparatus (12) comprising a connection part for mounting to a base unit (11), an input beam port to receive a main laser beam from a base unit (11) in an input optical path (22), a first output port (14) for connection to a flexible wave guide, a second output port (15) for connection to an articulated arm (16), and a switching element (56) moveable between a first position and a second position to direct an input beam to one of the first output port (14) and the second output port (15).

Abstract: Embodiments herein describe combining multiple optical signals so these signals propagate in the same direction in the same optical mode and polarization. In one embodiment, the techniques discussed herein are used to combine a reference laser with a frequency comb so that supercontinuum generation can then be performed to increase the frequency range of the frequency comb so that it includes the frequency of the reference laser.

Abstract: A method and system for locking the resonance frequency of ring resonators by using laser sources to emit a plurality of different wavelengths, applying a tagging signal to each of the wavelengths, multiplexing the tagged wavelengths using a wavelength division multiplexor, coupling the multiplexed tagged wavelengths onto a bus waveguide, detecting the multiplexed tagged wavelengths with a first photodetector disposed before a first ring resonator and a second photodetector disposed after a last ring resonator of a plurality of ring resonators, sending the signals detected by the first and second photodetector to a processor, which identifies and processes the tagging signals, generating a control signal for each ring resonator, by the processor and applying the control signals to phase shifters on each ring resonator of the plurality of ring resonators to tune and align the resonance wavelengths of the ring resonators with the wavelengths of the corresponding laser sources.

Abstract: A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber has an emitting end and a receiving end. In the emitting end, multiple VCSELs generate multiple optical signals of different wavelengths, and multiple photodiodes in the receiving end receive the optical signals emitted by the VCSELs. Both ends use a focusing lens array to collimate and focus the optical signals A Z-block-shaped prism performs a light combining function at the emitting end, while another Z-block-shaped prism performs a light splitting function at the receiving end. Both ends use a focusing lens for collimating and focusing the optical signals at ends of a multi-mode optical fiber, which is used for transmitting the optical signals generated by the VCSELs. The short-waveband active optical component has a small size and a high transmission rate.

Abstract: Photonic interconnect systems are described. A fiber connects a first photonic integrated circuit (PIC) to a second PIC. The fiber is non-polarization maintaining and as a results creates polarization drift. As a result, the polarization appearing at the output of a fiber may be different from the polarization launched at the input of the fiber. To reduce the negative effects of polarization drift, each PIC may be equipped with a polarization locker. Control circuitry is configured to control the first and second polarization lockers by setting one of the first and second polarization lockers to an active configuration and setting the other of the first and second polarization lockers to a passive configuration. Controlling the polarization lockers in this way prevents inconsistencies in polarization without having to expend additional resources that would otherwise be required to communicate the phase shift across the fiber.

Abstract: Embodiments of the present disclosure include optical transmitters and transceivers with improved reliability. In some embodiments, the optical transmitters are used in network devices, such as in conjunction with a network switch. In one embodiment, lasers are operated at low power to improve reliability and power consumption. The output of the laser may be modulated by a non-direct modulator and received by integrated optical components, such as a modulator and/or multiplexer. The output of the optical components may be amplified by a semiconductor optical amplifier (SOA). Various advantageous configurations of lasers, optical components, and SOAs are disclosed. In some embodiments, SOAs are configured as part of a pluggable optical communication module, for example.

Abstract: A linear N×N robotic fiber optic switch is described. Notably, fiber adapters for connecting the input and output fibers are arranged linearly. Moreover, each fiber adaptor is driven by a push-pull mechanism such that it can be positioned to a front, center, or back position, with which the private plane of a fiber port can be separated from the other fiber ports and fiber connection can be configured using a simple linear translation robotic pickup free of interference in a compact space. Furthermore, a large scale fabric switch comprises 3 stages of N linear N×N robotic switches connected using fiber shuffles. Each stage or all three stages can share one robot to reduce cost. Scalability to large port counts may be accomplished proportional to N, the number of ports, rather than N2.

Abstract: An input device for a multiple wavelength band optical switch comprising: an optical demultiplexer configured to receive light and disperse the received light along a dispersion axis; and a light director configured to direct light in a first wavelength band to the optical demultiplexer at a first angle of incidence and to direct light in a second wavelength band to the optical demultiplexer at a second angle of incidence, the second angle of incidence being different from the first: wherein the difference between the first and second angles of incidence causes the demultiplexer to output dispersed spectra of light corresponding to the first and second bands such that the dispersed spectrum corresponding to the first band is overlapped along the dispersion axis and separated along a switch axis relative to the dispersed spectrum corresponding to the second wavelength band, the switch axis being perpendicular to the dispersion axis.

Abstract: The present disclosure provides a photonic integrated circuit chip. The photonic integrated circuit chip comprises a plurality of connection ports, multiple polarization beam splitting structures, a photodetector structure, an interleaver and a modulator. The plurality of connection ports are used to receive a plurality of first optical signals to the photonic integrated circuit chip. The multiple polarization beam splitting structures each are used to split the first optical signal passing through the polarization beam splitting structure into a first mode optical signal and a second mode optical signal. The photodetector structure comprises a first component for split beam and a second component for split beam. The interleaver is used to transfer the first mode optical signal or the second mode optical signal to the second component for split beam. The modulator is used to transfer second optical signals with different wavelengths to the interleaver.

Abstract: An optical fiber sensing system according to this disclosure includes: a first optical fiber network (10A) configured to detect first sensing information about a monitoring target; a second optical fiber network (10B) configured to detect second sensing information about the monitoring target; a first reception unit (21A) configured to receive a first light signal from the first optical fiber network (10A); a second reception unit (21B) configured to receive a second light signal from the second optical fiber network (10B); and an identification unit (22) configured to identify the monitoring target, based on the first sensing information included in the first light signal, and the second sensing information included in the second light signal.

Abstract: The present disclosure describes a network including two levels of switching: a first level including wavelength selective switching via a first type of switching module, and a second level including fiber level switching via a second type of switching module. The two levels of switching allow for maintaining wavelength selective switching between transmission directions while introducing fiber selective switching between network degrees of the same transmission direction. The first type of switching module is configured to transmit and receive optical signals having a first set of wavelengths at a first network degree at a first direction in a node of a network. The second type of switching module is configured to transmit and receive the optical signals from the first type of switching module and route the optical signals at the first network degree to a second network degree in a second direction.