Abstract: There is provided a readout circuit (100) for a Silicon Photomultiplier (SiPM; 200). The photomultiplier (SiPM; 200) has a first main output (Sout) and a capacitively coupled second output (Fout). The readout circuit (100) comprises a combiner (110) having inputs (IN1, IN2) for receiving signals originating from the first main output (Sout) and the second output (Fout) of the Silicon Photomultiplier (SiPM; 200) and configured to generate a combined signal based on the received signals. A first signal path is defined between the first main output (Sout) and a first one (IN1) of the inputs of the combiner (110). A second signal path is defined between the second output (Fout) and a second one (IN2) of the inputs of the combiner (110).

Abstract: This invention relates to an incorporation of radio frequency (RF) access capabilities (e.g., Wi-Fi station capabilities) to an access point (AP) and/or endpoint (EP) of a wireless optical communication network (e.g. LiFi network) to be able to perform discovery, authentication, and association using an RF peer-to-peer mechanism (e.g. Wi-Fi Direct) and wake up the access point and/or endpoint, when it is established using the RF peer-to-peer mechanism that a wireless optical connection may be used as a high-speed data link. Advantageously, the RF link is used to configure the optical link and more advantageously, the AP controls its transmit power based on the coverage area of the wireless optical access point so that the RF communication may be setup in a timely manner allowing exchange of information on a optical link capabilities and to wake-up the optical transceiver(s).

Abstract: An Optical Wireless Communication, OWC, front end (300) comprises a reflective splitter (310). The reflective splitter (310) has a controller port (311) for optical coupling to a controller (200) which generates OWC signals, and the reflective splitter (310) has a plurality of user ports (312) for optical coupling to OWC endpoint devices (400). The reflective splitter (310) is constructed and arranged such that: light received at the controller port (311) is passed to one or more of the user ports (312) for transmission to one or more OWC endpoint devices (400) in optical wireless communication with that user port (312); and light received at any of the user ports (312a) is passed to at least one other of the user ports (312b, 312c) for transmission to one or more OWC endpoint devices (400) in optical wireless communication with that user port (312b, 312c).

Abstract: This invention relates to optical wireless communication systems that use radiation beams for communication. In such systems aiming at the communication partner is not easy especially if the distance between the communication devices is longer and radiation in the non-visible range is used. It is proposed to use an adaptive signal quality indicator in order to provide installing persons and users with a quick and deterministic way of aligning the communication devices.

Abstract: The invention herein is a method for transferring data between a docking station and a user device via LiFi. The docking station/user device comprises at least one LiFi transceivers, and the user device/docking station comprises at least one LiFi transceiver. The method comprising the steps of acquiring by the docking station/user device a first communication channel transfer property, the first communication channel being between a first LiFi transceiver of the docking station/user device and a first LiFi transceiver of the user device/docking station. Acquiring by the docking station/user device a second communication channel transfer property, the second communication channel being between a second LiFi transceiver of the docking station/user device and the first LiFi transceiver of the user device/docking station.

Abstract: A pluggable connector is provided for use in an optical wireless communications, OWC, system. A main housing has an electrical connector for pluggable connection to a socket, with an optical transmitter and receive circuitry in the main housing. A carrier part has an adjustable orientation relative to the main housing and includes a (passive) optical output device for delivering an optical communications signal beam and an (active) optical receiver for receiving an optical communications signal beam. A flexible optical connector is provided between the optical transmitter and the optical output device and a flexible electrical connector is provided between the optical receiver and the receive circuitry. This provides a hybrid connection scheme between a movable optical carrier part and a static electrical part.

Abstract: High-speed optical communication is very attractive to satisfy high throughput applications. In the meanwhile, it is also desirable to reduce the energy waste resulted from an idle state of the optical transceivers of the communication system. The present invention discloses that both the access point (1200) and the end point device (1100) can operate in at least two different operation states, a normal operation state and a low power state. The low power state is a default state, and the normal operation state is enabled only when a valid trigger is detected. To establish a high-speed optical link (60), the end point device (1100) first sends an optical trigger signal (50) to the access point (1200) in the low power state. The access pint (1200) switches to the normal operation state only when a valid trigger signal is identified after detecting the optical trigger signal (50).

Abstract: The one or more LED filaments (110) are arranged to form an inner space. At least one of the one or more LED filaments (110) is arranged as a LiFi transmitter. The LiFi device (100) further comprises a light sensor (120) arranged within the inner space. The light sensor (120) is arranged as a LiFi receiver. The LiFi device further comprises an envelope arranged to envelope the one or more LED filaments (110) and the light sensor (120). The one or more LED filaments (110) are further arranged such that the LED filament light is directed towards the envelope.