A nitride semiconductor light-emitting device with periodic gain active layers includes an n-type semiconductor layer, a p-type semiconductor layer and a resonator. The device further includes a plurality of active layers disposed between the n-type and p-type semiconductor layers so as to correspond to a peak intensity position of light existing in the resonator and at least one interlayer disposed between the active layers. The active layer disposed at the p-type semiconductor layer side has a larger light emission intensity than the active layer disposed at the n-type semiconductor layer side.

A nitride semiconductor light-emitting device with periodic gain active layers includes an n-type semiconductor layer, a p-type semiconductor layer and a resonator. The device further includes a plurality of active layers disposed between the n-type and p-type semiconductor layers so as to correspond to a peak intensity position of light existing in the resonator and at least one interlayer disposed between the active layers. The active layer disposed at the p-type semiconductor layer side has a larger light emission intensity than the active layer disposed at the n-type semiconductor layer side.

An opto-electronic system including a PIC that includes a semiconductor-based tunable laser source that can achieve single-mode lasing thereby emitting optical radiation having a predefined linewidth at a predefined operating wavelength. The PIC also includes an optical measurement unit that can receive the optical radiation emitted by said laser source, and provide a signal representative for the received optical radiation to a control unit of the opto-electronic system that is operatively connected with said laser source and the optical measurement unit. The opto-electronic system enables omitting external optical measurement equipment thereby enabling a faster and cheaper way of locking of the predefined operating wavelength of said laser and achieving the predefined linewidth. A method of improved tuning of a semiconductor-based tunable laser source of an opto-electronic system.

A semiconductor light-emitting device is provided which includes: a wiring substrate; a semiconductor light-emitting element disposed above an upper surface of the wiring substrate; and a cap unit which covers the semiconductor light-emitting element. The wiring substrate includes: a first substrate; a first metal layer and a second metal layer that are spaced apart from each other above the first substrate; and a spacer layer disposed above the first substrate. The cap unit includes a bonding surface which is bonded to the wiring substrate. The bonding surface intersects the first metal layer and the second metal layer in a top view of the wiring substrate, and the spacer layer is disposed between the bonding surface and the first substrate, at a position different from positions of the first metal layer and the second metal layer.

A light emission device includes: a plurality of semiconductor light-emitting elements; an optical element configured to collimate light emitted from each of the plurality of semiconductor light-emitting elements and output a plurality of collimated beams; a converging portion having a surface of a hyperboloid or a paraboloid configured to converge the plurality of collimated beams; and a wavelength-converting portion including a transmissive region, and a reflective region that surrounds the transmissive region, the transmissive region including a light-incident surface at which the plurality of collimated beams that have been converged by the converging portion enter, wherein the transmissive region includes a phosphor adapted to be excited by the plurality of collimated beams that have been converged by the converging portion.

A laser navigational system for a vehicle having a lighting assembly configured for emission of light. A lens array assembly receives incoming light from the lighting assembly and changes the direction of the incoming light received from the lighting assembly such that the outgoing light emanating from the lens array assembly is collimated in a first direction but diverges along a different, second direction. A scanning unit aligns with the lighting assembly to direct the collimated beam in two orthogonal directions. The lighting assembly, the lens array assembly and the scanning unit are configured to direct the light to form a visual beacon that guides navigation of the vehicle to a location.

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques.

An assembly includes a carrier and a structure having a core formed on the carrier, wherein the core has a longitudinal extension having two end regions, a first end region is arranged facing the carrier and a second end region is arranged facing away from the carrier, the core is formed as electrically conductive at least in an outer region, the region is at least partially covered with an active zone layer, the active zone layer generates electromagnetic radiation, a mirror layer is provided at least in one end region of the core to reflect electromagnetic radiation in a direction, a first electrical contact layer contacts an electrically conductive region of the core, and a second contact layer contacts the active zone layer.

A power beaming system includes a power beam transmitter arranged to transmit the power beam, and a power beam receiver arranged to receive the power beam from the power beam transmitter. A power beam transmission source is arranged to generate a laser light beam for transmission by the power beam transmitter from a first location toward a remote second location. A beam-shaping element shapes the laser light beam, at least one diffusion element uniformly distributes light of the shaped laser light beam, and a projection element illuminates a power beam receiving element of predetermined shape with the shaped laser light beam. At the power beam receiver, a diffusion surface diffuses a portion the power beam specularly reflected from the power beam receiver.

Provided is an image display device including: a light source part (200) for emitting coherent light; and a plurality of phase shift elements (301) arranged in two-dimensional directions, the device further including a phase shift part (300) for scanning the wavefront of the coherent light from the light source part (200) in two-dimensional directions, in which light is scanned in the two-dimensional directions by a phased array to thereby allow an observer to observe an image.