A light-emitting device includes a first light-emitting element, a phosphor, and a second light-emitting element having a peak wavelength between peak wavelengths of two peaks that define a deepest dip in a composite emission spectrum of the first light-emitting element and the phosphor.

The present invention belongs to the technical field of underwater communication, and provides a novel highly robust underwater optical communication system which comprises a sending module and a receiving module. The novel highly robust underwater optical communication system realizes highly robust underwater optical communication under strong interference of sunlight and artificial light sources. The system uses a new physical method irrelevant to frequency, and can be used with existing MIMO and CDMA to obtain better communication effects. The circularly polarized light is used for signal transmission, thereby avoiding the problem of channel misalignment caused by the rotation of a platform underwater. At the same time, good polarization maintaining of a marine environment makes the signal characteristics difficult to lose.

The present invention relates to the field of optical module, and provides a high-speed optical module for an optical fiber channel. The optical module can be used for 16G optical fiber channel, and comprises parts for emitting, receiving, clock data recovery and controlling. The optical module can be downward compatible with the application of 8G optical fiber channel and 4G optical fiber channel, support the diagnostic tests on optical circuit loopback and electrical circuit loopback, and provide stable receiving alarming. The optical module of the present invention, when serving as the interface between optical fiber channel systems and the interface between optical storage network storage devices, has the characteristics of miniaturization and low power consumption, and can improve port application density; the module supports hot swapping, which facilities the field debugging of the system, and can realize the replacing of the optical module without power down; and the module supports a digital diagnostic interface, and the network administrator can monitor the working state of the optical module by using the communication interface.

An optically enabled multi-chip module has an optical engine transceiver and a host system chip. The optical engine transceiver has an optical engine front-end and an optical engine macro. The optical engine front-end has multiple laser diodes, laser driver circuitry electrically interfaced with each of the laser diodes, multiple photodiodes, amplifier circuitry electrically interfaced with each of the photodiodes, and at least one optical element optically positioned between the laser diodes and at least one optical fiber and between the photodiodes and the at least one optical fiber. The at least one optical element optically interfaces the laser diodes and photodiodes with the optical fiber. The optical engine macro is both electrically interfaced with and physically segregated from the optical engine front-end. The optical engine macro provides a subset of optical transceiver functionality to the optical engine front-end. The host system chip is electrically interfaced with the optical engine transceiver.

An optical communication device including a plurality of groups of light emitting diode (LED) groups that are turn on according to a control of a lighting and communication control module. The lighting and communication control module is configured to receive an AC input voltage, generate a rectified voltage from the AC input voltage, determine a voltage level of the rectified voltage, sequentially drive the plurality of LED groups according to the voltage level of the rectified voltage, and perform optical communication through the plurality of LED groups only when the voltage level of the rectified voltage is greater than or equal to a preset threshold voltage level.

An optical module includes: a stem; a temperature control module; a carrier; a light emitting element fixed on a light emitting element fixing surface of the carrier, having a front surface and a rear surface opposite to each other, emitting signal light from a first emission point in the front surface, and emitting back light from a second emission point in the rear surface; a light receiving element fixed on the carrier by a light receiving element fixing surface; a lens cap; and a lens, wherein a reflecting surface is provided on the carrier, the light receiving element receives the back light reflected by the reflecting surface, and a center of a light receiving surface of the light receiving element is positioned between the front surface and the rear surface in an optical axis direction of the signal light.

A system comprises a writer to form a plurality of color mits on a base material, wherein at least one of the color mits may represent computer-readable instructions comprising data other than pixel-image data. The plurality of color mits may include a first color mit and a second color mit, wherein the first color mit represents information data, and the second color mit represents that the first color mit contains a particular type of information data. The system also may include a reader to read colors of the plurality of color mits on the base material. The system may comprise a device to map at least one of the color mits to computer-readable instructions. The system may further comprise a processor configured to transmit signals using a colored light.

A localization system 100 comprising multiple beacons 120 and an assignment system 110 is provided. The assignment system is arranged to assign a temporary location identifier to a location identifier associated with a beacon. A scheduler 150 is arranged to schedule the assigning of temporary location identifiers according to a schedule. It is avoided that the beacons have a fixed location identifier, thus third parties cannot create a mapping between the temporary location identifiers and the locations of the beacons.

Disclosed herein are methods, devices, and system for beam forming and beam steering within ultra-wideband, wireless optical communication devices and systems. According to one embodiment, a free space optical (FSO) communication apparatus is disclosed. The FSO communication apparatus includes an array of optical sources wherein each optical source of the array of optical sources is individually controllable and each optical source configured to have a transient response time of less than 500 picoseconds (ps).

An outdoor lighting system for illumination of an outdoor area, the system configured to provide dynamical control in the outdoor area, the system comprising: a plurality of luminaires configured in the outdoor area; a plurality of street devices connected with the plurality of luminaires; at least one remote processor; at least one secondary processor; a cloud to which the plurality of luminaires and the plurality of street devices are connected; and the at least one remote processor and the at least one secondary processor are connected to the cloud; wherein the plurality of luminaires and the plurality of street devices are controlled in a plurality of functional modes.