Patent application number | Description | Published |
20080317476 | Vehicle-Mounted Optical Communication System and Vehicle-Mounted Optical Transmitter - A vehicle-mounted optical communication system, which uses an optical signal to perform data transmission, comprises a first optical transmitter and an optical receiver. The first optical transmitter, which is mounted on a vehicle, has a multiple quantum well structure, in which an active layer has a quantum well layer of In | 12-25-2008 |
20090014712 | TUNNEL JUNCTION LIGHT EMITTING DEVICE - A tunnel junction light emitting device according to the present invention is provided with an active layer and an electron tunneling region supplying the active layer with carriers. The electron tunneling region has a first p-type semiconductor layer, a second p-type semiconductor layer and an n-type semiconductor layer. The second p-type semiconductor layer is sandwiched between the first p-type semiconductor layer and the n-type semiconductor layer, and the first p-type semiconductor layer, the second p-type semiconductor layer and the n-type semiconductor layer form a tunnel junction to which a reverse bias is applied. An energy level at a valence band edge of the second p-type semiconductor layer is equal to or lower than an energy level at a valence band edge of the first p-type semiconductor layer. | 01-15-2009 |
20090028201 | OPTICAL COMMUNICATION SYSTEM AND OPTICAL TRANSMITTER - An optical communication system for performing data transmission with optical signals comprises a first optical transmitter and a first optical receiver. The first optical transmitter has a first surface-emitting laser including an active layer of a multiple quantum well structure having a quantum well layer of In | 01-29-2009 |
20090080488 | SURFACE EMITTING LASER - A surface emitting laser including a semiconductor substrate, a semiconductor substrate, a first reflector formed on the semiconductor substrate, an active layer formed on the first reflector, a tunnel junction layer formed above a part of the active layer, a semiconductor spacer layer which covers the tunnel junction layer, a second reflector formed on the semiconductor spacer layer in a region above the tunnel junction layer, a first electrode formed in the periphery of the second reflector on the semiconductor spacer layer, and a second electrode electrically connected to a layer lower than the active layer, wherein a layer thickness of the semiconductor spacer layer in the region directly above the tunnel junction layer is thinner than the layer thickness of the semiconductor spacer layer in the region directly below the first electrode. | 03-26-2009 |
20090196317 | LIGHT EMITTING DEVICE - It is enabled to provide that a light emitting device have an electron blocking layer ( | 08-06-2009 |
20100020835 | SURFACE EMITTING LASER - A surface emitting laser is provided with a first multilayer Bragg reflecting mirror including a first layer, a second multilayer Bragg reflecting mirror including a second layer, and an optical resonator unit that is held between these multilayer Bragg reflecting mirrors and includes an active layer. Further, the optical resonator unit contacts with the first layer and second layer respectively. The effective refraction index n | 01-28-2010 |
20100034233 | SURFACE-EMISSION TYPE SEMICONDUCTOR LASER - The present invention provides a surface-emission type semiconductor laser wherein an effective length of a cavity is reduced, thereby enabling to realize a higher-speed direct modulation. In the surface-emission type semiconductor laser according to the present invention, when supposing the optical path length (L) of a resonator part relative to a lasing wavelength λ | 02-11-2010 |
20120314189 | LIGHT EMITTING ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE - The present invention includes light source layer ( | 12-13-2012 |
20130100636 | POLARIZER AND LIGHT-EMITTING DEVICE - Provided is a polarizer that includes wire grid structure ( | 04-25-2013 |
20130228818 | OPTICAL DEVICE - A semiconductor light emitting device includes a laminate section in which p-type layer | 09-05-2013 |
20140022818 | OPTICAL ELEMENT, ILLUMINATION DEVICE, AND PROJECTION DISPLAY DEVICE - An optical element that is capable of reventing an increase in size while increasing the light intensity of fluorescent light includes: a light-guide plate ( | 01-23-2014 |
20140043379 | PROJECTOR - Green light from solid-state light source | 02-13-2014 |
20140139809 | OPTICAL ELEMENT, LIGHT SOURCE APPARATUS, AND PROJECTION-TYPE DISPLAY APPARATUS - An optical element that can reduce the etendue of emitted light emitted from the optical element without having depend on the etendue of light-emitting elements is provided with a plasmon-excitation layer that is interposed between two layers having dielectric properties wherein, taking the plasmon-excitation layer as a border, the effective dielectric constant of the emission-side portion that is the emission layer side is higher than the effective dielectric constant of the incident-side portion that is the side of a carrier-generating layer, and the dielectric constant between the plasmon-excitation layer and the carrier-generating layer is higher than the dielectric constant between the carrier-generating layer and the light-incident surface. | 05-22-2014 |
20150085464 | LIGHT EMITTING DEVICE - A light emitting device of the present invention comprises a light source and an optical filter and is characterized by that it further comprises a first light guiding member of a taper shape whose cross-sectional area is gradually increased and a second light guiding member whose flare angle is smaller than that of the taper shape of the first light guiding member, wherein the length of the second light guiding member is smaller than the first light guiding member. | 03-26-2015 |