Abstract: According to an aspect of an embodiment, operations may include receiving a light wave and generating a pumping wave by performing polarization modulation on the light wave based on a bit stream. The pumping wave may include a first polarization component having a first polarization and a second polarization component having a second polarization and having a same wavelength as the first polarization component. The operations may also include emitting the pumping wave in an optical medium such that the pumping wave amplifies an optical signal propagating within the optical medium.

Abstract: Vector and matrix multiplications can be accomplished in photonic circuitry by coherently combining light that has been optically modulated, in amplitude and/or phase, in accordance with the vector and matrix components. Disclosed are various beneficial photonic circuit layouts characterized by loss- and delay-balanced optical paths. In various embodiments, loss balancing across paths is achieved with suitable optical coupling ratios and balanced numbers of waveguide crossings (using dummy crossings where needed) across the paths. Delays are balanced in some embodiments with geometrically delay-matched optical paths.

Abstract: A controller for a front-exciting Raman-amplifier that amplifies an optical signal transmitted from one end of an optical fiber to other end by inputting an excitation light to the one end, the controller includes a memory, and a processor coupled to the memory and configured to acquire communication-related information regarding communication of the optical signal in the optical fiber, when the acquired communication-related information does not indicate the communication of the optical signal, set a Raman gain of the front-exciting Raman amplifier based on a first light intensity of an amplified spontaneous scattered light of the excitation light, and when the acquired communication-related information indicates the communication of the optical signal, set the Raman gain based on a second light intensity of the optical signal output from the optical fiber.

Abstract: Systems and methods include responsive to transmission of a power spectral density input into an optical system with one or more probe signals, obtaining first measurements of a performance metric of each of the one or more probe signals at an output of the optical system while the one or more probe signals are moved across a band of optical spectrum; responsive to causing power perturbations across the band, obtaining second measurements of the performance metric of each of the one or more probe signals at the output of the optical system while the one or more probe signals are moved across the band; analyzing the performance metric as a function of power utilizing the first measurements and the second measurements; and utilizing results from the analyzing to optimize the performance metric in the optical system.

Abstract: A data management structure (1a) on board a transportation device, incorporating a cabin (100) provided with seats (110), includes a data resource block (210) incorporating audiovisual transmission system units (211 to 213), outward communication systems (100) and/or cabin systems, a standardised data distribution architecture (10a), and devices (E1 to E4) for operating said systems. In the structure (1a), the standardised architecture (10a) includes a concentration box (11) for the bidirectional transfer, on the one hand, of base signals with the resource block (210) and, on the other hand, optical signals with the devices (E1 to E4) of the cabin (100) on at least one optical fibre (2, 3; 2a, 2?a; 2b). This concentration box (11) houses units for processing (211 to 213) by signal switching, bidirectional conversion into optical signals, and optical signal management by wavelength allocation and distribution of downstream (F1) and upstream (F2) optical flows.

Abstract: Embodiments relate to a free space optical (FSO) terminal that transmits and receives optical beams. The FSO terminal includes a fore optic and a rotatable dispersive optical component. A receive (Rx) optical beam from the remote FSO communication terminal is received through the fore optic, and a transmit (Tx) optical beam is transmitted through the fore optic. The dispersive optical component is positioned along the optical paths of both the Rx and Tx optical beams. Since the Rx and Tx optical beams have different wavelengths and the dispersive optical component has a wavelength dependence, the dispersive optical component creates an angular separation between the Rx and Tx optical beams. The controller controls the rotational position of the dispersive optical component (and possibly also the wavelength of the Tx optical beam) to achieve a desired angular separation between the Rx and Tx optical beams.

Abstract: Disclosed is a multi-channel optical signal generating apparatus, which includes a CW laser that generates a single optical signal, an optical signal processor unit that processes the single optical signal, an oscillator that generates an electrical signal, and an electrical signal processor unit that generates a modulation signal, based on the electrical signal, and the optical signal processor unit includes ‘n’ optical circulators, at least one optical intensity modulator, (m-1) optical phase modulators, and ‘n’ BiODLs, the electrical signal processor unit includes a RF power divider which divides the electrical signal, and ‘m’ RF power amplifiers, the RF power divider divides the electrical signal into ‘m’ divided electrical signals, and the optical signal processor unit modulates and outputs the single optical signal by the at least one optical intensity modulator and the (m-1) optical phase modulators, based on the ‘m’ divided electrical signals divided from the RF power divider.

Abstract: Proposed is a signal transmission method for a transmitting end performing visible light communication. The signal transmission method for a transmitting end performing visible light communication comprises: a step of modulating a signal; and a step of applying analog dimming control on the modulated signal and transmitting same. Meanwhile, the analog dimming control may include biasing of the modulated signal, and scaling of the modulated signal.

Abstract: A method of loading a fiber optic transport system includes detecting optical power in a frequency sub-band of optical spectrum, wherein the frequency sub-band includes data-bearing channels and at least one control channel; measuring optical power in the frequency sub-band; and adjusting optical power of the at least one control channel based on the measured optical power, wherein the optical power is adjusted through one of changing a current of control channel lasers and controlling a set of fast optical attenuators.

Abstract: A wide-angle illuminator module including a rigid support structure having a plurality of angled faces, a flexible circuit including one or more VCSEL arrays, each VCSEL array positioned over a face among the plurality of angled faces, each VCSEL array including a plurality of integrated microlenses with one microlens positioned over each VCSEL in the VCSEL array, and a driver circuit for providing electrical pulses to each VCSEL array, wherein the plurality of VCSEL arrays address illumination zones in a combined field of illumination. The support structure may also be a heatsink. The flexible circuit may be a single flexible circuit configured to be placed over the support structure or a plurality of flexible circuits, each including one VCSEL array.

Abstract: Upon receiving a communications signal conveying symbols at a symbol period T, a receiver applies filter coefficients to a digital representation of the communications signal, thereby generating filtered signals having a shape in the frequency domain characterized by a bandwidth expansion factor ?, where components of the filtered signals correspond to angular frequencies ? = - ? ? ( 1 + ? ) T ? ? … - ? ? ( 1 - ? ) T , + ? ? ( 1 - ? ) T ? ? … + ? ? ( 1 + ? ) T . The receiver calculates first-order components from a first phase derivative of the components at a first differential distance, second-order components from a second phase derivative of the first-order components at a second differential distance, and composite second-order components from an average of the second-order components over multiple time intervals.

Abstract: A passive optical network device comprising a casing, printed circuit board, and fiber optic transceiver system is provided. The fiber optic transceiver system comprises a fiber optic components device, fiber optic transceiver, and RF connector. During operation, the fiber optic components device converts optical signals from the fiber optic transceiver to digital signals, and then transmits the converted digital signals to external electronic systems via the hot-pluggable transceiver connection interface. The fiber optic components device converts digital signals from the external electronic systems to optical signals, and then transmits the optical signals to other external electronic systems via the fiber optic transceiver. The RF connector transmits RF signals from additional external electronic systems to the external electronic systems via the hot-pluggable transceiver connection interface.

Abstract: The present disclosure relates to an optical line terminal that can be used in an optical fiber access system based on passive optical networks. The present disclosure further relates to a PON system; in particular the optical line terminal can be configured such that colourless components can be employed in a PON system using the optical line terminal and such that wireless communication can be directly employed in a PON system.

Abstract: Systems and methods for reducing the variation in the power of optical signals transmitted in an upstream direction, at the inputs of an active combiner in an RFoG CATV architecture preferably configured to reduce optical beat interference, so as to increase the dynamic range of a laser in the active combiner.

Abstract: Examples described herein relate to an optical system. In some examples, the optical system may include a light-conducting medium and a first optical device to transmit an optical signal over the light-conducting medium. Further, the optical system may include a second optical device coupled to the light-conducting medium to receive an optical signal transmitted by the first optical device. In some examples, at least one of the first optical device, the light-conducting medium, and the second optical device may include an in-situ capacitive structure to detect light intensity. Moreover, the optical system may include a monitoring circuit electrically coupled to the in-situ capacitive structure to generate an electrical signal indicative of the light intensity detected by the in-situ capacitive structure.

Abstract: Disclosed is a hardware-based protection group switching method and optical communication equipment.

Abstract: In one embodiment, an apparatus includes a connector for coupling a cable comprising at least one optical fiber and at least one electrical wire to an optical module at a network communications device, the connector comprising an electrical contact plate for engagement with an electrical contact on the optical module, and a ferrule for receiving the at least one optical fiber. The electrical contact plate is configured for electrically coupling the at least one electrical wire to the electrical contact on the optical module for delivery of power through the optical module.

Abstract: An optical access network includes an optical hub having at least one processor, and a plurality of optical fiber strands. Each optical fiber strand has a first strand end connected to the optical hub. The network further includes a plurality of nodes connected to at least one segment of a first fiber strand of the plurality of optical fiber strands. Each node is sequentially disposed at respective locations along the first fiber strand at different differences from the optical hub, respectively. The network further includes a plurality of end-points. Each end-point includes a receiver. Each respective receiver (i) has a different optical signal-to-noise ratio (OSNR) from the other receivers, (ii) is operably coupled with at least one node of the plurality of nodes, and (iii) is configured to receive the same optical wavelength signal from the first fiber strand as received by the other receivers.

Abstract: High power, high speed VCSEL arrays are employed in unique configurations of arrays and sub-arrays. Placement of a VCSEL array behind a lens allows spatial separation and directivity. Diffusion may be employed to increase alignment tolerance. Intensity modulation may be performed by operating groups of VCSEL emitters at maximum bias. Optical communications networks with high bandwidth may employ angular, spatial, and/or wavelength multiplexing. A variety of network topologies and bandwidths suitable for the data center may be implemented. Eye safe networks may employ VCSEL emitters may be paired with optical elements to reduce optical power density to eye safe levels.

Abstract: Systems and methods for performing signed matrix operations using a linear photonic processor are provided. The linear photonic processor is formed as an array of first amplitude modulators and second amplitude modulators, the first amplitude modulators configured to encode elements of a vector into first optical signals and the second amplitude modulators configured to encode a product between the vector elements and matrix elements into second optical signals. An apparatus may be used to implement a signed value of an output of the linear processor. The linear photonic processor may be configured to perform matrix-vector and/or matrix-matrix operations.