101results about How to "Extended wavelength range" patented technology

The invention discloses a colorless and transparent light-cured 3D printing material and belongs to the technical field of cured materials. The printing material comprises organopolysiloxane containing a vinyl group, organopolysiloxane containing a silicon-hydrogen bond, a photoinitiator, reinforcing filler and an aid. A preparation method of the material comprises steps as follows: evenly mixing the organopolysiloxane containing the vinyl group, the organopolysiloxane containing the silicon-hydrogen bond, the reinforcing filler and the aid in percentage by mass; then adding the photoinitiator, and evenly mixing the mixture to obtain the colorless light-cured 3D printing material. The printing material has the benefits as follows: (1) the light-cured product is colorless, good in transparency and elastic; (2) the light-cured material is low in molding shrinkage, and the volume shrinkage is lower than 1.0%; (3) all components in a resin mixture participate in curing, no volatile solvent exists, and pollution is avoided; (4) the printing material is high in curing light source applicability, and the maximum curable light wavelength is 405 nm.

A light-emitting apparatus includes: light-emitting devices emitting light of different single colors in a visible wavelength region, wherein each of the light-emitting devices includes an organic layer which is interposed between first and second electrodes and in which a first or second light-emitting layer emitting light of different single colors is included at a first or second position separated from each other in a direction from the first electrode to the second electrode; a first reflective interface which is provided on the side of the first electrode so as to reflect light emitted from the first or second light-emitting layer to be emitted from the side of the second electrode; and a second reflective interface and a third reflective interface which are provided on the side of the second electrode at mutually separated positions in that order in a direction from the first electrode to the second electrode.

A light-emitting device including: an organic layer which is interposed between a first electrode and a second electrode and in which a first light-emitting layer and a second light-emitting layer emitting light of single colors or two or more different colors in a visible wavelength region are sequentially included at mutually separated positions in that order in a direction from the first electrode to the second electrode; a first reflective interface which is provided on the side of the first electrode so as to reflect light emitted from the first light-emitting layer and the second light-emitting layer to be emitted from the side of the second electrode; and a second reflective interface and a third reflective interface which are sequentially provided on the side of the second electrode at mutually separated positions in that order in a direction from the first electrode to the second electrode.

A photoelectric conversion device and a method for manufacturing the same are provided. The photoelectric conversion device includes a first semiconductor layer including a first impurity element over a substrate, a second semiconductor layer including an amorphous layer and a crystal over the first semiconductor layer, and a third semiconductor layer including a second impurity element over the second semiconductor layer. The crystal penetrates between the first semiconductor layer and the third semiconductor layer.

An article of manufacture and method for making a luminescent solar concentrator or a wavelength shifting device. The article includes a light guide or optical medium with a luminescent material disposed therein or deposited on the surface. The luminescent material is formulated to absorb incoming radiation and wavelength shift that radiation to a larger wavelength for processing and use, and to minimize reabsorption of the shifted radiation by the luminescent material.

A polarizing beam-splitter apparatus, comprising: an input port through which an input beam of lights is provided; a first polarizing beam splitter that receives the input beam and splits the beam into at least a first and second beam, said first beam having substantially a first desired polarization state and said second beam having a second polarization state orthogonal to said first polarization state but possibly admixed with the first polarization state; and an optical system that receives the second beam and provides a third beam having the second polarization state and a smaller admixture of the second polarization state than the second beam.

A nanophotonic device includes at least two waveguides located on top of a transparent substrate, which form an intersection point at which a part of a first waveguide simultaneously constitutes a part of a second waveguide. A nanoscale element located on top of the intersection point so that it partially or completely covers the intersection point is switchable between two different states, which differ by a refractive index value. The nanophotonic device is operated by injecting at least two optical pulses into the waveguides. Intensity of the optical pulses is selected so that a superposition of the optical pulses switches the nanoscale element into a desired state. Also disclosed is a nanophotonic matrix array in which parallel waveguides form nanophotonic devices. The nanophotonic matrix array may be used as a spatial light modulator (SLM), as an optical mirror, as an optical absorber, or as a tunable optical grating array.

The present invention provides methods of introducing a polynucleotide into a target cell, wherein the method employs a light generating protein coding sequence acting as a reporter. An important advantage of the methods described herein is that drug resistant target cells or target cells having no useful auxotrophic markers can be effectively transformed. The present invention also includes transformed cells produced by the methods described herein. Also described are light generating protein coding sequence modifications, a variety of vectors, and methods of using the transformed cells of the present invention.

A photo-FET based on a compound semiconductor including a channel layer formed on a substrate constituting a current path between source and drain electrodes, serving as part of a photodiode and a photosensitive region. A back-gate layer that serving as a substrate-side depletion layer formation layer is disposed between the substrate and the channel layer, and applies to the channel layer a back-gate bias by photogenerated carriers upon illumination. A barrier layer is disposed on the front side of the channel layer that causes one of the photogenerated carriers to run through the channel layer and other of the photogenerated carriers to sojourn or be blocked off. A front-side depletion layer formation layer is disposed on the front side of the channel layer brings the front-side depletion layer into contact with the substrate-side depletion layer without illumination to close the current path in the channel layer, bringing the photo-FET to an off-state.

An optical system has a diode pump source, and a gain media made of a material with an anisotropic absorption. The gain media is cut at an angle to produce substantially polarization-independent absorption of a pump beam. An optical coupler is positioned between the diode pump source and the gain media. The optical coupler produces a pump beam that has substantially equal amounts of pump power along any two orthogonal axis that are orthogonal to the pump beam in the gain medium. The wavelength range allowed for the pump source is extended.

A wavelength sensing lighting system may include a light source, a sensor and a controller. One or more light sources and sensors may be included in an array. The light source may emit an illuminating light and the sensor may sense an environmental light. The illuminating light may include data light. The lighting system may include a plurality of nodes connected in a network. The nodes may communicate by emitting and receiving the data light, which may be analyzed by the controller. The light source and the sensor may be provided by a light emitting semiconductor device that is capable of emitting illuminating light and receiving environmental light. A conversion material may convert the wavelength of a source light into a converted light. The conversion material may increase the wavelength range of light emittable and detectable by the lighting system.

A clock transfer device is designed to perform long-distance transfer of a reference clock, which is generated based on a high-precision frequency standard, toward a remote place. The clock transfer device includes a first mode-locked laser for generating a first optical pulse train having a first repetition frequency and a first wavelength, and a second mode-locked laser for generating a second optical pulse train having a second repetition frequency and a second wavelength. The first optical pulse train is introduced into a resonator of the second mode-locked laser via a wavelength multiplexing coupler so that the second repetition frequency is passively synchronized with the first repetition frequency; then, the second optical pulse train is transmitted via a single mode fiber.

A photo-FET based on a compound semiconductor including a channel layer formed on a substrate constituting a current path between source and drain electrodes, serving as part of a photodiode and a photosensitive region. A back-gate layer that serving as a substrate-side depletion layer formation layer is disposed between the substrate and the channel layer, and applies to the channel layer a back-gate bias by photogenerated carriers upon illumination. A barrier layer is disposed on the front side of the channel layer that causes one of the photogenerated carriers to run through the channel layer and other of the photogenerated carriers to sojourn or be blocked off. A front-side depletion layer formation layer is disposed on the front side of the channel layer brings the front-side depletion layer into contact with the substrate-side depletion layer without illumination to close the current path in the channel layer, bringing the photo-FET to an off-state.

The invention relates to an online simultaneous monitoring sensor and an online simultaneous monitoring method for COD (Chemical Oxygen Demand) and nitrogen content of nitrate. The online simultaneous monitoring method is characterized by comprising the following steps: absorbing characteristics of ultraviolet light by using substances to be detected in water based on a Lambert-Beer principle and establishing a relation of absorbance and concentration of the substances to be detected; establishing a linear relation by using an absorbance value of a water sample at 254nm part and a chemical oxygen demand concentration value of the water sample; and establishing a linear relation between the absorbance value of the water sample at 210nm part and the nitrogen content of the nitrate. The monitoring method comprises two steps of calibrating the sensor and testing the water sample; and the measurement range on the chemical oxygen demand of the sensor provided by the invention is 0mg / L-50mg / L and the measurement range on the nitrogen of the nitrate is 0mg / L-7mg / L. The obvious superiority is displayed and the sensor can be directly put into water to measure so as to meet the detection requirements of a common water body.

The invention discloses a preparation method for an Ag / AgBr / GO nano-composite photocatalyst containing graphene oxide (GO), and belongs to the field of photocatalysts. Active components of the Ag / AgBr / GO nano-composite photocatalyst are Ag / AgBr / GO; the structure is that Ag / AgBr colloidal spheres are uniformly distributed on the layer-shaped GO. The preparation method is simple, and is fulfilled according to an one-step method; PVP and CTAB are adopted as surfactants; the CTAB is source of the BR<-> at the same time; first, the PVP and the CTAB are dissolved in glycol at a certain temperature; the GO and AgNO3 are added; reaction is conducted at 155 DEG C for 15 min to obtain the Ag / AgBr / GO nano-composite material. The prepared Ag / AgBr / GO nano-composite material is adopted as a photocatalyst, is used for light degradation of rhodamine, and acquires excellent catalyzed effect; meanwhile, the catalyst shows favorable stability.

The invention relates to a method and a device for obtaining multi-wavelength laser.The prior art features high cost and difficult control over wave length interval.In the method of the invention, a corresponding component is selected according to spectral range of multi-wavelength laser, then a wavelength-fixed semiconductor laser unit and a wavelength-tunable semiconductor laser unit are selected; finally wavelength of the wavelength-tunable semiconductor laser unit and gain coefficient of an er-doped fiber amplifier are adjusted to obtain multi-wavelength laser.In the invention, the wavelength-fixed semiconductor laser unit and the wavelength-tunable semiconductor laser unit are respectively connected with a first photo-coupler; the first photo-coupler is connected with an input port fiber of a second photo-coupler; an output port of the second photo-coupler is connected with input port fiber of the er-doped fiber amplifier; the other output port of the second photo-coupler serves as the output port of the multi-wave laser.The laser obtained in the invention has the characteristics of long wavelength range, tunable wavelength interval and narrow bandwidth of single-wavelength laser.

Disclosed is a white-light LED manufacturing method. The method is characterized by including the following steps: placing a blue-light LED chip (1) with excitation wavelength of 450-470nm on a support cup body (2); electrically connecting anode and cathode of the chip with an anode and a cathode (7) which are externally connected through guide lines (6) respectively; uniformly mixing fluorescent power glue (3) formed by fluorescent power and two-component LED encapsulating silica gel, wherein mass ratio of the fluorescent power and the two-component LED encapsulating silica gel is 30-55:200; uniformly filling the support cup body (2) with the fluorescent powder glue (3), wherein baking temperature is 140-160 DEG C and baking time is 1-2 hours; covering a lens (4), and filling the two-component LED encapsulating silica gel (5); baking at 140-160 DEG C for 1-2 hours for forming. A white-light LED manufactured by the method changes along with working temperature of the blue-light LED chip, white-light color area of the white-light LED does not drift basically, and grading of the blue-light LED chip and grading of the white-light LED after being encapsulated are reduced, so that production cost is lowered.

A broadband optical fiber tap for transferring optical energy out of an optical fiber having an optical fiber with a primary and secondary microbends for the purpose of coupling optical energy into the higher-order modes of the fiber, and a reflecting surface formed in the cladding of the fiber and positioned at an angle so as to reflect, by total internal reflection, higher-order mode energy away from the optical fiber. In the preferred embodiment, the two microbends are spaced apart by a distance approximately equal to one-half of the intermodal beat length for LP01 and LP11 modes of a single-mode fiber.

In accordance with the present invention, a multi-wavelength cross-correlator for two radiation pulses is disclosed. In one embodiment, a method for operating the cross-correlator is disclosed. A first radiation pulse is focused upon the photodiode. A second radiation pulse is also focused on the photodiode where the first and second radiation pulses illuminate a common point on the photodiode. The first and second radiation pulses, which have different wavelengths, are converted into a photocurrent using the photodiode where the product of the first and second intensities is proportional to the photocurrent. An amplitude of the photocurrent is detected while varying the delay of at least one of the first and second radiation pulses. In another embodiment, a multi-wavelength cross-correlator includes a radiation detector and a current detector. The radiation detector converts energy from the first and second radiation pulses, which have different wavelengths, into a current. The first radiation pulse contacts a first area of the radiation detector and the second radiation pulse contacting a second area of the detector with the first and second areas overlapping. The current sensor determines an amplitude of the current.

The invention is a double-pumping wide-band optical-fiber parameter amplifier, composed of two pumping lasers, a pumping coupler, a signal laser, a signal coupler, a wave division multiplexer and a high-nonlinear optical fiber triple-cascaded in turn. The zero-dispersion wavelength of the first-stage optical fiber is close to the central wavelengths of two pumping lights, the second-order dispersion of the second-stage optical fiber in the position of central wavelength of the pumping light is positive and that of the third-stage is negative. The two pumping lights and a signal light are coupled by the wave division multiplexer and then enter into the triple optical fiber in turn, which generates an idle light after they passing through the first-stage optical fiber whose output end has a gain spectrum approximately symmetrical around the central wavelength of the pumping light but uneven, reduces the unevenness of the curve of the gain spectrum after they passing through the second-stage optical fiber and corrects the gain spectrum after they passing through third-stage optical fiber. It can cover low-loss window of full wave optical fiber, thus able to fully use the bandwidth of the full wave optical fiber to push forward the WDM optical-fiber communication system.

An array structure solves issues that exist in conventional compound semiconductor photodiode arrays, such as large cross talk, large surface leaks, large stray capacitance, narrow detection wavelength bands, and bad manufacturing yield, simultaneously. A photodiode array has, laminated upon a semiconductor substrate, a buffer layer (8) with a broad forbidden band width, an I-type (low concentration photosensitive layer (2) with a narrow forbidden band width, and an n-type semiconductor window layer (3) with a broad forbidden band width, wherein photodiode elements are electrically separated from adjacent elements, by doping the periphery of the p-type impurity, and the detection wavelength band is expanded, by making the n-type window layer (3) on the photosensitive layer (2) a thinner layer with crystal growth.

A light-emitting device includes: an organic layer which is interposed between a first electrode and a second electrode and in which a first light-emitting layer and a second light-emitting layer emitting light of single colors or two or more different colors in a visible wavelength region are sequentially included at mutually separated positions in that order in a direction from the first electrode to the second electrode; a first reflective interface which is provided on the side of the first electrode so as to reflect light emitted from the first light-emitting layer and the second light-emitting layer to be emitted from the side of the second electrode; and a second reflective interface and a third reflective interface which are sequentially provided on the side of the second electrode at mutually separated positions in that order in a direction from the first electrode to the second electrode.

A clock transfer device is designed to perform long-distance transfer of a reference clock, which is generated based on a high-precision frequency standard, toward a remote place. The clock transfer device includes a first mode-locked laser for generating a first optical pulse train having a first repetition frequency and a first wavelength, and a second mode-locked laser for generating a second optical pulse train having a second repetition frequency and a second wavelength. The first optical pulse train is introduced into a resonator of the second mode-locked laser via a wavelength multiplexing coupler so that the second repetition frequency is passively synchronized with the first repetition frequency; then, the second optical pulse train is transmitted via a single mode fiber.

The invention relates to the technical field of optical modulators, and particularly relates to an optical waveguide modulator. The optical waveguide modulator comprises a modulation area, a wavelength selection area and a connection area, wherein the modulation area is in a resonant cavity structure and used for changing the refractive index of an optical waveguide through a physical reaction, and a nonlinear relation is formed between the refractive index and phase change of the optical waveguide; the wavelength selection area is in a closed optical waveguide structure and used for carrying out selection on resonance wavelengths by using an interference method; and the modulation area and the wavelength selection area are subjected to optical signal transmission by the connection area. By using the the optical waveguide modulator provided by the invention, a nonlinear change relation between a refractive index and a coupling coefficient can be realized by a special coupling structure, and the reduction on the size of the modulator can be realized while high-efficiency coupling regulation is carried out. Compared with the existing optical waveguide modulator, the modulation efficiency ratio of the optical waveguide modulator provided by the invention is over 10 times as large as the existing optical waveguide modulator; and because the modulation area is isolated from the wavelength selection area, the drift influence (caused by an active thermal effect) on operation wavelengths is reduced.

The invention discloses a flame-resistant and antibacterial composite material capable of performing 3D printing as well as a preparation method and application thereof. The flame-resistant and antibacterial composite material capable of performing 3D printing comprises the following components in parts by weight: 55 to 80 parts of high-molecualr polymer, 2 to 15 parts of toughening agent, 5 to 25parts of adjuvant, 8 to 30 parts of flame retardant, 0.2 to 3 parts of antibacterial agent and 0.1 to 3 parts of light stabilizer. The flame-resistant and antibacterial composite material capable ofperforming 3D printing has the characteristics of excellent flame resistance, high mechanical property, high antibacterial property, high printing stability and the like, is simple, convenient and reasonable in production process and relatively low in economic cost, and can be widely applied in the fields of furniture, decorative lighting, props, automobiles, buildings and the like.

A light-emitting device includes: an organic layer which is interposed between a first electrode and a second electrode and in which a first light-emitting layer and a second light-emitting layer emitting light of single colors or two or more different colors in a visible wavelength region are sequentially included at mutually separated positions in that order in a direction from the first electrode to the second electrode; a first reflective interface which is provided on the side of the first electrode so as to reflect light emitted from the first light-emitting layer and the second light-emitting layer to be emitted from the side of the second electrode; and a second reflective interface and a third reflective interface which are sequentially provided on the side of the second electrode at mutually separated positions in that order in a direction from the first electrode to the second electrode.

The invention discloses a solar cell structure and a preparation method thereof, relating to the technical field of solar energy. The solar cell structure is invented for optimizing the optical property and the passivation property of a surface antireflection passivation layer and improving the photoelectric conversion efficiency of the cell. The solar cell structure comprises a cell substrate, wherein the sunny side of the cell substrate is provided with SiNx antireflection passivation layers of an m-layer membrane structure (m is an integer and is greater than or equal to three), wherein the first layer membrane structure is arranged on the cell substrate, the second layer membrane structure is arranged on the first layer membrane structure,..., the mth layer membrane structure is arranged on the (m-1)th layer membrane structure; the refractive index of the first layer membrane structure is greater than that of the second layer membrane structure,..., and the refractive index of the mth layer membrane structure is greater than that of the (m-1)th layer membrane structure. The solar cell structure provided by the invention can be applied to the crystal silicon cell technology.

The invention relates to a method for rapidly screening artificial diamonds. Light exciting tested samples to give out light is incident light containing partial wavelengths or total wavelengths in arange of 400-900nm, the radiating area of the light source is large, and light in a wavelength range of 860-1100nm generated by the artificial diamonds under light source excitation is imaged and detected. Compared with other detection manners in the prior art, the method disclosed by the invention is simple and high in efficiency, low in equipment requirement and capable of realizing large-scalescreening.