13 results about "Wavelength converters" patented technology

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.

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 wavelength converter includes: a first multiplexer that combines input signal light with wavelength-conversion excitation light; a second multiplexer that combines the signal light with Raman excitation light; a first nonlinear optical medium that generates wavelength-converted light of the signal light, based on a nonlinear optical effect; and a second nonlinear optical medium that amplifies wavelength-converted light of the signal light output from the first nonlinear optical medium. A wavelength of the Raman excitation light being a wavelength within an amplification band that allows Raman amplification of wavelength-converted light.

This invention provides a network node comprising: an optical fibre interface configured to receive, from one or more remote optical sources, a first optical signal, a second optical signal and a third optical signal, wherein the first, second and third optical signals each have a respective wavelength within an optical fibre transmission band being one of the O-band, E-band, S-band, C-band, L-band, and U / XL-band; one or more wavelength converters configured to convert the wavelength of one or more of the first optical signal, second optical signal and third optical signal; and a Rydberg-atom based transmission medium configured to be excited by the first optical signal, second optical signal and third optical signal, following wavelength conversion of one or more of the first optical signal, second optical signal and third optical signal, such that electrons of the Rydberg-atom based transmission medium are excited to a predetermined Rydberg state.

The present invention provides a wavelength conversion device, a light source device, and a projector that can easily maintain the temperature of the wavelength conversion element. [Solution] The wavelength conversion device comprises a substrate having a first surface, a rotating device for rotating the substrate, a wavelength conversion element disposed on the first surface side of the substrate and converting 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 change medium to which heat from the wavelength conversion element is transferred. The substrate has a recess provided on the first surface side of the substrate at a position corresponding to the wavelength conversion element, the phase change medium is sealed in the recess, and the phase state of the phase change medium is a two-phase state of liquid phase and solid phase, at least while the first light is incident on the wavelength conversion element.

A photon wavelength converter includes a substrate. The photon wavelength converter also includes a photodetector layer stack disposed over the substrate and configured to receive radiation of a first wavelength and to convert the radiation of the first wavelength into one or more electrical signals. The photodetector layer stack includes a first photodetector layer and a second photodetector layer including indium gallium arsenide (InGaAs) or indium gallium arsenide phosphide (InGaAsP) disposed over the first photodetector layer. The photon wavelength converter further includes an array of light emitting elements monolithically integrated into the photodetector layer stack and configured to convert the one or more electrical signals into radiation of a second wavelength.

The application discloses a PPLN wavelength converter, which comprises a wavelength converter, a connecting optical fiber wire harness is connected to both ends of the wavelength converter, and a connecting socket is installed on one side of the wavelength converter; a shell is arranged on the wavelength converter, a shell cover is covered on the shell, a PPLN crystal assembly is installed in the shell, coupling optical fiber pieces are installed at both ends of the PPLN crystal assembly, a plurality of fixing devices are arranged at both ends of the PPLN crystal assembly, a sealing strip is arranged in the shell cover, clamping grooves are formed at both ends of the shell, and a plurality of connecting columns are arranged below the shell cover. The solid wall blocks are arranged on the inner walls of the shell, the PPLN crystal assembly is arranged between the solid wall blocks, the auxiliary shift gears on the two sides of the blocks are meshed with the built-in rack grooves, the auxiliary shift gears are shifted up and down, the auxiliary pressing pads press the side walls of the PPLN crystal assembly, and the stability of the PPLN crystal assembly is ensured. Compared with the traditional adhesive installation, the package is firm, and the package is more convenient to disassemble and take out.

The present invention provides a wavelength conversion device, a light source device, and a projector capable of suppressing the occurrence of delamination between the wavelength conversion layer and the substrate. [Solution] The wavelength conversion device comprises a substrate having a first surface, a wavelength conversion layer positioned on the incident side of the substrate for first light in a first wavelength band and converting the incident first light into second light in a second wavelength band different from the first wavelength band, a reflective film positioned between the wavelength conversion layer and the first surface and reflecting light incident from the wavelength conversion layer, and a bonding portion positioned between the reflective film and the first surface and bonding the reflective film and the substrate, wherein the bonding portion contains silver and a migration-inhibiting substance that suppresses the movement of silver.

A wavelength conversion apparatus includes: a first demultiplexer wavelength-separating an optical signal having wavelengths of a first band wavelength-multiplexed into n drop signals acquired by wavelength-multiplexing optical signals of predetermined wavelengths and a through signal acquired by wavelength-multiplexing an optical signal of a wavelength being not a target of wavelength conversion; a second demultiplexer demultiplexing optical signals of the predetermined wavelengths included in the n drop signals into optical signals; n wavelength converters wavelength-converting first optical signals of wavelengths included in the optical signals into second optical signals of the second band; n first multiplexers multiplexing the wavelength-converted second optical signals, and outputting n third optical signals; and a multiplexing unit multiplexing and outputting the n third optical signals, an optical signal acquired by wavelength-multiplexing wavelengths of a second band previously wavelength-separated from the wavelength-multiplexed optical signal, and the through signal.

A cooling device, a light-source device, an image projection apparatus, and a wavelength converter. The cooling device includes a housing having a storage space, the storage space storing a heater and a base on which the heater is disposed, a heatsink at least partially disposed in the storage space and thermally connected to a space outside the storage space to dissipate heat generated by the heater to outside of the storage space, and an airflow path forming member covering at least some of the heatsink and forming a path for the heatsink to receive air flow absorbing the heat generated by the heater. In the cooling device, the heater or the base at least partially protruding from the airflow path member when the airflow path member is viewed in a direction orthogonal to a face of the heater on which light strikes.

There is provided an information processing apparatus including: a specification unit that specifies a route for converting a wavelength of an optical signal from a first wavelength to a second wavelength and transferring the converted optical signal at a relay node, based on a usage state of a wavelength at nodes that perform communication using an optical signal; and a control unit that controls the nodes in such a way as to perform communication using an optical signal in the route when it is determined that the route is reachable, based on a deterioration characteristic of an SN ratio in a wavelength converter that converts a wavelength of an optical signal from the first wavelength to the second wavelength at the relay node.