95 results about "Wavelength converters" patented technology

A WXC device includes: input ports; output ports; a wavelength conversion unit including input-side WSSes, wavelength converters, and output-side WSSes; and a controller. The input-side WSSes each output an optical signal input from a corresponding one of the input ports to a selected one of the wavelength converters. The wavelength converters each convert a wavelength band of the optical signal input from each of the input-side WSSes into another wavelength band and output the converted optical signal to a respective one of the output-side WSSes. The output-side WSSes each perform route switching on the optical signal input from the respective one of the wavelength converters toward a selected one of the output ports. The controller manages, for each of the wavelength converters, whether the wavelength converter is unused and controls the input-side WSSes each to output the input optical signal to one of the unused wavelength converters.

An LED includes first / second doped layers with active region(s) therebetween emitting a first wavelength. A wavelength converter on a first LED surface absorbs the first wavelength and emits a second, longer wavelength. A second LED surface is against a substrate surface. A first electrical contact on the first LED surface extends along LED sidewalls, separated from the active region(s) and second doped layer by an insulating layer, connecting the first doped layer to a first contact pad. In some instances, contact pads are on the substrate surface; a second electrical contact extends onto LED sidewalls, connecting the second doped layer to a second contact pad. In some other instances contact pads are on laterally-extending portions of the second doped layer. The insulating layer separates the first contact pad from the second doped layer; a second contact pad is in direct electrical contact with the second doped layer.

An LED includes first / second doped layers with active region(s) therebetween emitting a first wavelength, and is arranged in a vertical die geometry with a reflective first electrical contact on a first LED surface. A wavelength converter absorbs the first wavelength and emits a second, longer wavelength. Some examples include a transparent second electrical contact on a second LED surface or angled LED sidewalls, and the wavelength converter is on the LED surface and the angled LED sidewalls. Some other examples include a second electrode on LED side surfaces extending beyond a second LED surface to form a cavity, with the wavelength converter on the second LED surface at least partly filling the cavity.

A high-power light source based on laser remote fluorescence excitation is characterized by comprising a laser diode module used for generating laser, a light beam shaping module used for shaping laser beams and focusing the laser beams on a fluorescent film, and a fluorescence wavelength converter used for converting the laser into white light. The fluorescence wavelength device sequentially comprises a fluorescent film, a dielectric film, a transparent substrate and a grid type heat conduction membrane; the fluorescent film is located on one side of the transparent substrate, and the grid type heat conduction membrane is located on the other side of the transparent substrate. The heat dissipation performance of the fluorescence conversion module is improved, and the efficiency and reliability of the fluorescence converter are improved. The light source can be applied to the fields of illumination, display, machine vision and the like.

A single-material-double-process parametric laser-wavelength converter includes a pump-laser source, a nonlinear optical material, a first optical reflective element, and a second optical reflective element. The pump-laser source is configured to emit a pump-laser pulse light. The nonlinear optical material receives the pump-laser pulse and generates a signal-laser pulse and a partially depleted pump-laser pulse through optical parametric amplification. The first optical reflective element is configured to reflect the signal-laser pulse back to the same nonlinear optical material. The second optical reflective element is configured to reflect the partially depleted pump-laser pulse back to the same nonlinear optical material. With an appropriate adjustment on the reflecting path lengths, the nonlinear optical material is configured to receive the temporally synchronized signal-laser pulse and the partially depleted pump-laser pulse to generate an idler output through difference frequency generation. Both optical parametric amplification and difference frequency generation occur in the same nonlinear optical material.

Disclosed is a light emitting device. The light emitting device includes: a substrate; a light emitting unit disposed on the substrate; a wavelength converter disposed on the light emitting unit; an optical unit disposed on the wavelength converter; and a barrier disposed on the substrate and covering side surfaces of the light emitting unit, the wavelength converter, and the optical unit. The optical unit includes an optical base and an optical pattern composed of recess-protrusion structures formed on at least one surface of the optical base.

A wavelength converter material doped with one or more rare earth elements may provide improved temperature sensing precision and / or improved mechanical stability due to reduced structural anisotropy. The converter material may be powder phosphor or ceramic phosphor. The converter material may comprise GdAlO3:Cr in addition to the one or more rare earth elements.

Light-emitting device package comprising: a plurality of light-emitting structures (130) spaced apart from one another, each of the plurality of light-emitting structures comprising a first conductivity-type semiconductor layer (131), an active layer (132), a second conductivity-type semiconductor layer (133), a first surface provided by the first conductivity-type semiconductor layer (131), and a second surface provided by the second conductivity-type semiconductor layer (133), wherein the first surface is opposite the second surface; a common first electrode (170N) extending parallel to the first and second surfaces of the plurality of light-emitting structures (130) on a plane distinct from the planes of the first and second surfaces, wherein the common first electrode (170N) connects respective first conductivity-type semiconductor layers (131) of the plurality of light-emitting structures (130) and comprises at least one of tungsten and tungsten silicide; a plurality of second electrodes (141) arranged on the second surfaces of the plurality of light-emitting structures (130) and connected to respective second conductivity-type semiconductor layers (133) of the plurality of light-emitting structures (130); a plurality of wavelength converters (190R, 190G, 190B) arranged on the first surfaces and spaced apart from each other to correspond to the plurality of light-emitting structures (130); and a shaped section (160) covering side surfaces of the plurality of light-emitting structures (130) and side surfaces of the plurality of wavelength transducers (190R, 190G, 190B), wherein the shaped section (160) has a partition structure separating the plurality of wavelength transducers (190R, 190G, 190B) from one another, and having a material having an elastic modulus lower than that of the plurality of light-emitting structures (130), wherein the common first electrode (170N) is aligned on a surface arranged parallel between the first surfaces and the second surfaces, characterized by the fact that the common first electrode has (170N): a plurality of individual electrode sections (170NA) arranged in an area overlapping the plurality of light-emitting structures and connected to the respective first conductivity-type semiconductor layers (131); at least one pad section (170NC) arranged in an area that does not overlap the majority of light-emitting structures (130); and a connecting section (170NB) that connects the majority of individual electrode sections (170NA) together and connects at least one of the majority of individual electrode sections (170NA) to the at least one pad section (170NC), wherein each of the plurality of individual electrode sections (170NA) is arranged to surround a perimeter of an area of ​​a corresponding light-emitting structure (130).

A wavelength converting apparatus includes a base having a first surface; a rotator configured to rotate the base; a wavelength converter disposed at a side facing the first surface of the base and configured to convert incident first light having a first wavelength band into second light having a second wavelength band different from the first wavelength band; and a phase changing medium to which heat of the wavelength converter is transmitted. The base has a recess provided at the first surface of the base at a position corresponding to the wavelength converter. The phase changing medium is encapsulated in the recess, and a phase state of the phase changing medium is a liquid-solid two-phase state at least during a period for which the first light is incident on the wavelength converter.

To provide a light source device and a projector excellent in light utilization efficiency.SOLUTION: The light source device according to the present disclosure includes the first light source configured to emit the first light beam, the first wavelength conversion element configured to convert the first light beam into the second light beam, the first optical layer configured to transmit the first light beam and reflect the second light beam, the light guide section configured to guide the second light beam, the second wavelength conversion element configured to convert the first light beam into the third light beam, the second optical layer configured to reflect the second light beam and the third light beam, and the first reflecting member. The first wavelength converter has the first surface on which the first light is incident via the first optical layer and the second and third surfaces that intersect the first surface and face away from each other, the first reflection member is disposed in a region of the light guide section that is the region facing the second surface, and the second light and the third light travel through the light guide section and exit via a region of the light guide section that is the region facing the third surface.SELECTED DRAWING: Figure 2

A wavelength converter material doped with one or more rare earth elements may provide improved temperature sensing precision and / or improved mechanical stability due to reduced structural anisotropy. The converter material may be powder phosphor or ceramic phosphor. The converter material may comprise GdAlO3:Cr in addition to the one or more rare earth elements.

A light source apparatus according to the present disclosure includes: a light source configured to output first light; a diffuser that the first light output; an optical element that the first light passing through the diffuser enters; a light collection system that the first light passing through the optical element enters; a wavelength converter configured to convert part of the first light into second light; and a reflection system configured to reflect another part of the first light, wherein the optical element includes a first reflection film configured to reflect the second light, the wavelength converter includes a light incident surface on which the first light is incident, and a second reflection film provided at the light incident surface and configured to separate the first light into the part and the other part, and the other part of the first light separated by the second reflection film enters the diffuser.

Wavelength converter including: a phosphor layer; and a filter layer where the filter layer is attached directly to the phosphor layer, wherein the wavelength converter has a total thickness between 20 µm and 80 µm, wherein the filter layer comprises at least two different metal oxides selected from the group consisting of SiO2, Al2O3, TiO2, Nb2O5, Ta2O5, HfO2 and Y2O3.

A wavelength conversion device includes a base member having a first surface, a wavelength conversion layer disposed at an incident side of first light in a first wavelength band with respect to the base member and configured to convert the first light incident thereon into second light in a second wavelength band different from the first wavelength band, a reflective film disposed between the wavelength conversion layer and the first surface and configured to reflect light incident thereon from the wavelength conversion layer, and a bonding portion disposed between the reflective film and the first surface and configured to bond the reflective film and the base member to each other, wherein the bonding portion contains silver and a movement suppressing substance configured to suppress movement of silver.

A light source apparatus according to an aspect of the present disclosure includes a first light source configured to output first light; a second light source configured to output second light; a wavelength converter configured to convert the first light and second light into third light; a first optical layer configured to transmit the first light and reflect the third light; a light guide configured to guide light; an incident angle adjusting system configured to adjust an angle of incidence of the second light with respect to the wavelength converter; and a second optical layer configured to transmit the second light and reflect the third light. The wavelength converter has a first surface, a second surface, and a third surface. The first light enters the wavelength converter via the first optical layer and the light guide and via the third surface. The third light exits out of a region on the first surface side of the light guide. The second light enters the incident angle adjusting system, which adjusts the angle of incidence of the second light, and the resultant second light enters a region on the second surface side of the light guide via the second optical layer, and part of the second light enters the wavelength converter via the third surface and is converted into the third light by the wavelength converter, and another part of the second light exits out of a region on the first surface of the light guide.

A light source device includes a first laser emitter configured to emit first light, a light transmissive member having a first surface and a second surface, the first light emitted from the first laser emitter being incident on the second surface, a base having a first support part configured to support the first laser emitter and a second support part configured to support the light transmissive member, and a wavelength converter arranged on the first surface and configured to convert the first light into second light. The wavelength converter has an incident surface including an incident area where the first light enters and an emission surface disposed at an opposite side to the incident surface and configured to emit the second light. The second support part supports the second surface of the light transmissive member in an area corresponding to the incident area.

A laser system includes a first laser outputting first laser light, an optical intensity changer outputting first pulse laser light, a modulator widening spectral linewidth of the first laser light or the first pulse laser light, an optical fiber amplifier amplifying the first pulse laser light and outputting second pulse laser light, a second laser outputting second laser light, an optical parametric amplifier amplifying the second laser light and outputting third pulse laser light, a wavelength converter outputting fourth pulse laser light using the second and third pulse laser light, an amplification section amplifying the fourth pulse laser light and outputting fifth pulse laser light, and a processor controlling a modulation signal such that the fifth pulse laser light having target spectral linewidth is generated, and controlling the center wavelength of the second laser light such that the fifth pulse laser light having a target center wavelength is generated.

An LED includes first / second doped layers with active region(s) therebetween emitting a first wavelength, and is arranged in a flip chip geometry with reflective layer(s) on a first LED surface. A wavelength converter facing a second LED surface absorbs the first wavelength and emits a second, longer wavelength. In some examples, the wavelength converter is on the LED surface and angled sidewalls. In some other examples, the wavelength converter is on the surface and angled sidewalls of a dielectric medium on the second LED surface. In still other examples, the LED can include on the first LED surface a mesa with the active region(s) and one of the doped layers, with angled LED and mesa sidewalls. The wavelength converter is on the LED surface and reflective layer(s) are on the LED sidewalls.

A ROADM divides signal light among sub-ROADMs of multiple groups according to band. The sub-ROADMs have TPAs and WSSs constituting adding / dropping units for adding or dropping signal light in different bands with respect to desired routes, wavelength converters for converting wavelength bands of the signal light into a transmission band, and optical switches for switching and coupling the TPAs to transceivers. Further, the ROADM has a controller for controlling the TPAs of the adding / dropping units and the optical switches to add or drop signal light to be transmitted or received by the transceivers, the signal light being added to or dropped from desired routes, from the sub-ROADMs of the groups corresponding to the bands.

A light source device according to one embodiment of the present disclosure comprises: a light source unit that divides excitation light into a plurality of light beams and outputs the plurality of light beams; a light guide member includes a hollow light guide path on an inner side thereof, the hollow light guide path having a first opening and a second opening on an opposite side to the first opening, the light guide member having a plurality of wavelength converters disposed on at least a portion of a side surface of the light guide path, the plurality of wavelength converters are configured to emit light beams with different wave bands; and a light condensing device that guides each of the plurality of light beams output from the light source unit to a corresponding one of the plurality of wavelength converters.

A light source apparatus according to an aspect of the present disclosure includes a first light source configured to output first light; a wavelength converter configured to convert the first light into second light; a first optical layer configured to transmit the first light and reflect the second light; a second light source configured to output third light; a light guide configured to guide the second light and the third light; a parallelizing system configured to parallelize the third light; and a second optical layer configured to transmit the third light and reflect the second light. The wavelength converter has a first surface and a second surface that face opposite sides, and a third surface that intersects with the first surface and the second surface. The first light is incident on the third surface of the wavelength converter via the first optical layer. The second light travels through the light guide and exits out of a region on the first surface side of the light guide. The third light is parallelized by the parallelizing system, enters a region on the second surface side of the light guide via the second optical layer, travels through the light guide in the direction parallel to the third surface, and exits out of the region of the light guide, which is a region facing the first surface.

An LED includes first / second doped layers with active region(s) therebetween emitting a first wavelength, and is arranged in a vertical die geometry with a reflective first electrical contact on a first LED surface. A wavelength converter absorbs the first wavelength and emits a second, longer wavelength. Some examples include a transparent second electrical contact on a second LED surface or angled LED sidewalls, and the wavelength converter is on the LED surface and the angled LED sidewalls. Some other examples include a second electrode on LED side surfaces extending beyond a second LED surface to form a cavity, with the wavelength converter on the second LED surface at least partly filling the cavity.

The invention relates to the technical field of light source devices, in particular to a wavelength conversion device and an assembly structure, the wavelength conversion device is provided with a partition piece used for being connected with a power mechanism and insulating heat, and the wavelength conversion device is further provided with blades used for heat dissipation. According to the wavelength conversion device and the assembly structure, heat can be effectively prevented from being conducted to the power mechanism, the power mechanism is effectively protected, the power mechanism can stably work within a safe temperature range for a long time, the service life is prolonged, the heat is effectively dissipated and led out through the blades, and the service life is prolonged. It is guaranteed that the wavelength conversion layer works in a proper temperature state, the wavelength conversion efficiency is guaranteed, and the fluorescence output brightness is guaranteed.

A light source apparatus according to an aspect of the present disclosure includes: a first light source configured to output first light; a wavelength converter configured to convert the first light into second light; a second light source configured to output third light; a light guide configured to guide the first light, the second light, and the third light; and a controller configured to control a state in which the second light source outputs the third light. The wavelength converter has a first surface, a second surface, and a third surface. The first light enters the wavelength converter through the third surface via the light guide. The second light travels through the light guide and exits out of a region on the first surface side of the light guide. The third light includes fourth light in a first polarization state, and fifth light in a second polarization state, and enters a region on the second surface side of the light guide. The second light source includes a first light emitting section configured to emit the fourth light and a second light emitting section configured to emit the fifth light. The light emitting sections each include a laser diode. The controller is configured to temporally change a ratio between an amount of the fourth light and an amount of the fifth light.

This near-infrared light-emitting device (1) is provided with: at least one solid-state light-emitting element (10) that emits primary light (11) having a maximum spectral intensity in the wavelength range of 380 nm or more and less than 700 nm; a light diffuser (20) that diffuses the primary light (11) and emits diffused light (21); and a light absorber (20) that absorbs the diffused light (21). And a near-infrared phosphor (31) that emits output light (50) containing the near-infrared light as a light component and that converts the wavelength of the near-infrared light into near-infrared light having a maximum fluorescence intensity in a wavelength range of 700 nm or more and less than 2500 nm. The near-infrared light-emitting device (1) emits output light (50) containing the near-infrared light as a light component.

LED packages, wafers of LED dies and methods of manufacture are described. An LED package includes an LED die. The LED die includes a light-emitting semiconductor stack, which has a light-emitting top surface, a bottom surface opposite the light-emitting top surface, and at least one side surface. The light-emitting semiconductor stack is configured to emit pump light through the light-emitting top surface when powered on. First and second solder pads are disposed on the bottom surface of the light-emitting semiconductor stack and are electrically coupled to the semiconductor stack. A silicone wavelength converter is provided over the light-emitting top surface of the LED die. A first silicone material surrounds the side surfaces of the light-emitting semiconductor stack. A second silicone material is disposed under the LED die and surrounding the first and second solder pads. The second silicone material is harder than the first silicone material.

A light source apparatus according to an aspect of the present disclosure includes a first light source section that outputs first light containing a first polarized component and a second polarized component, a second light source section that outputs second light, a wavelength converter that converts the first light into third light, a light combiner that combines the first light, the second light, and the third light, and a filter that attenuates light of the third wavelength band. The light combiner reflects the first polarized component and transmits the second polarized component to cause one of the first polarized component and the second polarized component to exit toward the wavelength converter, and transmits the first light and the second light or the third light and reflects the third light or the first light and the second light. The filter is movable.

A light-emitting apparatus includes a luminescent structure and a stepped-index structure, and can further include an LED. The luminescent structure absorbs light at an excitation wavelength and emits light at one or more emission wavelengths longer than the excitation wavelength. The stepped-index structure is a stack of multiple transparent layers positioned between and in contact with an ambient medium and the luminescent structure, with corresponding refractive indices lower than the refractive index of the luminescent structure, higher than the refractive index of the ambient medium, and monotonically decreasing from the luminescent structure toward the ambient medium. The LED can be positioned with its light-emitting surface facing the surface of the luminescent structure opposite the stepped-index structure. The stepped-index structure can increase transmission of light from the luminescent structure into the ambient medium.

The present inventive concept relates to a hybrid wavelength converter including both a metal halide perovskite nanocrystal particles and non-perovskite-based quantum dots or non-perovskite-based phosphors converting a wavelength of light generated from an excitation light source to specific wavelengths, and a light-emitting device including the same. By including metal halide perovskite nanocrystal particles and non-perovskite quantum dots or non-perovskite phosphors in the dispersion medium, the hybrid wavelength converter according to the present inventive concept enables to make simultaneous wavelength conversion to red and green light, and to be optically stable and improved color purity and luminescence performance without changing the emission wavelength range even with a lower cadmium content than the conventional quantum dot wavelength converter.

A light emitting device is adapted to realize white light and includes a first light emitting diode chip emitting light having a first peak wavelength in the range of 400 nm to 420 nm, a second light emitting diode chip emitting light having a second peak wavelength in the range of 420 nm to 440 nm, and a wavelength converter covering the first and second light emitting diode chips. The wavelength converter including a blue phosphor, a green phosphor, and a red phosphor. When a maximum value of a spectral power distribution of the light emitting device or a maximum of a reference spectral power distribution of black body radiation is 100%, a difference between the spectral power distribution of the light emitting device and the reference spectral power distribution is less than 20% at each wavelength in the wavelength range of 440 nm to 640 nm.