Embodiments of the present disclosure provides a visible light communication network. The visible light communication network includes a plurality of optical network nodes, any two optical network nodes of the plurality of optical network nodes are connected through an optical connection, the plurality of optical network nodes form at least one optical communication link, and each of the at least one optical communication link includes at least part of the plurality of optical network nodes. A first optical network node is configured to communicate an optical signal with another optical network node through an optical connection between the first optical network node and the other optical network node, and the first optical network node is any optical network node in the optical communication link.

A system and method are disclosed for providing a bi-directional data communication link within a LIDAR assembly that has a stationary portion attached to an autonomous vehicle and a second portion rotatably connected to the stationary portion. The second portion may include one or more emitting/receiving devices (e.g., lasers) for detecting objects surrounding the autonomous vehicle. A first printed circuit board assembly (PCBA) having a first optical transceiver may be located within the stationary portion. A second PCBA having a second optical transceiver may be located within the second portion. A hollow shaft may be positioned so as to extend between the stationary portion and the second portion.

An optical transmission/reception unit includes a carrier rotatable around an axis of rotation, an optical receiver arranged at the carrier on the axis of rotation so as to receive an optical reception signal from a first direction, an optical transmitter arranged at the carrier adjacent to the optical receiver so as to emit an optical transmission signal in a second direction, and a transmission/reception optic arranged at the carrier on the axis of rotation above the optical receiver, wherein the transmission/reception optic includes a reception optic and a transmission optic arranged in the reception optic, wherein the reception optic is configured to guide the optical reception signal striking the transmission/reception optic towards the optical receiver on the axis of rotation, and wherein the transmission optic is configured to displace onto the axis of rotation the optical transmission signal emitted by the optical transmitter.

A method for connecting a wireless communication station (STA) with a selected one of a plurality of access points (APs) are described. At least some of the APs are initially substantially unsynchronized in time. The method includes transmitting, by the STA, a beacon request signal via an uplink channel, performing, by the APs and in response to the beacon request signal, a synchronization procedure, the synchronization procedure comprising transmitting, by each of the APs, a respective beacon signal via at least one downlink channel, such that the beacon signals from the plurality of APs are substantially synchronized in time, receiving, by the STA, the beacon signals from the plurality of APs, selecting, by the STA, one of the plurality of APs in dependence on at least one property of the beacon signals, and associating the STA with the selected one of plurality of APs. Related systems and devices are described.

The present invention relates to a fiber branch structure for spatial optical communication for transmitting information by emitting communication light. The fiber branch structure is provided with: a light emitter configured to emit communication light; a light emission controller configured to control the light emitter; an optical fiber configured to transmit the light emitted from the light emitter; a distributor configured to distribute the light, the distributer being optically coupled to an output terminal of the optical fiber; and an optical fiber group optically coupled to a plurality of output terminals of the distributor. According to the present invention, a communication area can be established without blind spots. That is, the fiber branch structure for spatial optical communication according to the present invention includes an optical fiber group optically coupled to a plurality of output terminals of the distributor. A communication area can be established more assuredly by such an optical fiber group, which prevents the optical communication from being interrupted.

An optical communication device 1 is provided with: a plurality of light-receiving elements 11 each configured to receive light and output a light detection signal; a plurality of optical fibers 13 provided to correspond to the plurality of light-receiving elements 11, respectively, the plurality of optical fibers each being configured to guide the light to the corresponding light-receiving element 11; a plurality of amplifiers 18 provided to correspond to the plurality of light-receiving elements 11, respectively, the plurality of amplifiers each being configured to generate optical communication information by performing signal processing on the light detection signal; a light intensity information collection unit 25 configured to collect intensity of the light received by each of the plurality of optical fibers 13 as light intensity information; an optical fiber identification unit 27 configured to identify the optical fiber 13 that is receiving relatively strong light out of the plurality of optical fibers 13, based on the light intensity information La to Le collected by the light intensity information collection unit 25; and a switch controller 29 configured to control to turn on the amplifier 18, the amplifier 18 being provided to correspond to the optical fiber 13 identified by the optical fiber identification unit 27.

In order to provide a spatial optical transmission apparatus capable of transmission and reception on one optical axis in common between transmission and reception, the optical transmission apparatus includes: an optical circulator configured to output an optical signal input to a first port from a second port, and output an optical signal input to the second port from a third port; a light projecting movable lens positionally adjustable in a plane substantially perpendicular to an optical axis of an optical signal passing through the second port; a light receiving movable lens positionally adjustable in a plane substantially perpendicular to an optical axis of an optical signal passing through the third port; a spectroscope configured to split an optical signal having passed through the light receiving movable lens to transmitted light and reflected light; a position sensor configured to detect a position of an optical axis using either one of the transmitted light or reflected light from the spectroscope; and a control unit configured to perform position adjustment of the light receiving movable lens and/or the light projecting movable lens on the basis of the optical axis position detected by the position sensor, and control optical axis adjustment so that the other of the transmitted light or reflected light from the spectroscope is appropriately incident on the reception optical fiber cable.

A detection and communication module arranged to implement a face detection function and an optical wireless communication function, and including a processing unit, a transmission chain and a reception chain, the processing unit being arranged to transmit via the transmission chain a detection signal, to receive via the reception chain the detection signal following its reflection on a face surface of an individual, and to evaluate a distance between the detection and communication module and the face surface of the individual, the processing unit being further arranged to transmit via the transmission chain a transmitted optical wireless communication signal containing data to be transmitted, and to receive via the reception chain a received optical wireless communication signal.

An assembly including an avionics cabinet and a module. The module being insertable into a recess of the avionics cabinet along a longitudinal axis and securely held there in a reversible manner in an operative position. The module having a first face opposite a first wall of the avionics cabinet. The first wall includes a first optical array having first optical emitters and first optical receivers. The first face of the module includes a second optical array having second optical emitters and second optical receivers. When the module is in the operative position, the first and second optical arrays are spaced apart from each other by a predefined distance. Each second optical emitter is arranged opposite a first optical receiver and each second optical receiver is arranged opposite a first optical emitter.

A data storage device is involved in data storage technology. The data storage device of present invention includes a data memory which is placed in a hermetic housing, a power interface of the data memory which is connected to the wireless power transmission unit, and a data transmission interface of the data memory which is connected to the wireless data transmission unit. The wireless power transmission unit and the data transmission unit are placed in the housing. The present invention avoids the damage to the data memory due to the oxidation of the internal conductors.