19 results about "Erbium" patented technology

This invention provides a quasi-two-dimensional / two-dimensional van der Waals heterojunction based on SOI and Si / WS2, its preparation method, and its application. The method includes the following steps: cleaning the SOI substrate; using sulfur powder, tungsten oxide powder, sodium chloride powder as a catalyst, and erbium chloride and ytterbium chloride powder as dopants, chemical vapor deposition is performed on the SOI substrate to prepare an erbium- and ytterbium-doped monolayer WS2 material; the top silicon layer of the SOI substrate is an n-type silicon layer. This invention, employing the above-mentioned quasi-two-dimensional / two-dimensional van der Waals heterojunction based on SOI and Si / WS2, its preparation method, and its application, effectively reduces the defect density during material synthesis while significantly increasing the carrier concentration in the material. The prepared photodetector exhibits good photoelectric response performance, providing a simple and efficient new method for the preparation of high-performance heterojunction photodetectors.

The application relates to a method of an electric field sensor based on an optoelectronic oscillator, belonging to the field of optical devices and optical fiber sensing. The device comprises a laser source, a polarization controller, a phase modulator, a fiber Bragg grating with an acrylate glue cavity, a stacked piezoelectric ceramic, an electric field generator, an erbium-doped fiber amplifier, a photodetector, a power divider and an electric amplifier. The stacked piezoelectric ceramic is combined with the fiber Bragg grating with the acrylate glue cavity as a sensing head, the wavelength change of the fiber Bragg grating with the acrylate glue cavity caused by the piezoelectric effect is mapped to the frequency change of the microwave signal generated by the optoelectronic oscillator, and the electric field change value can be obtained by monitoring the microwave signal of the optoelectronic oscillator. In the loop of the optoelectronic oscillator, the electric spectrum analysis technology is used for demodulation, and high-speed and high-resolution electric field measurement can be obtained. The method has the advantages of simple structure, high measurement sensitivity and easy practicability.

The application discloses a temperature measuring method and device for the internal flow channel of a heat exchanger. The method comprises the following steps: taking dysprosium and erbium co-doped quartz optical fiber as a temperature sensing element; exciting rare earth ions in the optical fiber to generate characteristic fluorescence; collecting dysprosium and erbium fluorescence signals; obtaining the fluorescence lifetime of dysprosium and comparing it with a characteristic threshold to obtain a temperature classification; based on the temperature classification, different segmented weighted fusion algorithms are respectively used to calculate the sensor temperature; when the temperature classification is consistent with the calculation result of the weighted fusion algorithm, the calculation result is output; when the temperature classification is not consistent with the calculation result of the weighted fusion algorithm, the calculation result is used to correct the temperature classification, and the segmented weighted fusion algorithm is called by using the corrected temperature classification to obtain a measured result. The application can improve the accuracy of temperature measurement.

Solution synthesis of rare-earth-doped nanoparticles, followed by flash sintering of the nanoparticles, can produce rare-earth-doped transparent polycrystalline ceramics with beneficial optical and / or mechanical properties, such as low optical losses, high optical coherence, high refractive-index controllability, and / or high mechanical strength. In one example application, high-quality erbium-doped yttria for quantum memory devices can be fabricated.

This application provides an erbium-doped optical fiber, an optical amplifier, and a communication device, relating to the field of optical communication technology. The erbium-doped optical fiber is a radiation-resistant erbium-doped fiber, exhibiting good gain and a low noise figure. The erbium-doped optical fiber includes a core and a cladding, with the cladding enclosing the core. It also includes a radiation-resistant layer disposed between the core and the cladding, comprising germanium, fluorine, and silicon dioxide. The absolute value of the difference between the refractive index of the radiation-resistant layer and the refractive index of the core is less than the absolute value of the difference between the refractive index of the radiation-resistant layer and the refractive index of the cladding.

Disclosed herein are optical amplifier devices, optical amplifier assembly, and optical amplifier systems. Example embodiments may include: a plurality of input optical ports, each being configured to receive one of a plurality of input optical signals; a plurality of output optical ports, each being configured to output one of a plurality of output optical signals; a plurality of tap photodiodes, each respectively being connected to one of the plurality of input optical ports and the plurality of output optical ports; a wavelength division multiplexer configured to receive the input optical signal from each of the plurality of input optical ports and an optical input from a laser pump device and output a plurality of pumped optical signals; a plurality of erbium-doped fiber coils, each having a first end configured to receive one of the plurality of pumped optical signals and a second end configured to output an amplified optical signal; and an optical isolator configured to receive, for each of the plurality of erbium-doped fiber coils, the amplified optical signal and output the plurality of output optical signals, wherein the plurality of output optical ports are configured to receive one of the plurality of output optical signals.

This invention belongs to the field of thermal barrier coating technology for aero-engines, and relates to an erbium-cerium dual rare earth modified europium zirconate thermal barrier coating material and its preparation method. The molecular formula of the thermal barrier coating material is (Er x Ce y Eu (1‑x‑y) The erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating is prepared by electron beam physical vapor deposition (EBPV) with x = 0.05~0.2 and y = 0.1~0.3. The deposition process parameters are: electron beam current intensity 1.5-1.7 A; sample temperature 950-1050℃; evaporation time 30-60 min. The evaporation time is controlled to obtain an erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating on a rotating sample. The thermal barrier coating material of this invention has a coefficient of thermal expansion close to that of YSZ and exhibits low thermal conductivity. Furthermore, the use of electron beam physical vapor deposition to prepare the erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating results in a columnar crystal structure and good lifespan. This invention can reduce the thermal conductivity of the coating, increase its service temperature, and address the problem of insufficient coating service life.

This invention discloses a rare-earth-doped glass polishing powder, its preparation method, and its applications. The polishing powder uses cerium oxide as a matrix, and introduces one or more rare-earth elements from lanthanum, yttrium, dysprosium, or erbium through co-precipitation. This allows the rare-earth elements to be uniformly doped into the cerium oxide lattice, forming a stable solid solution structure. Calcination is then used to control the grain size and oxygen vacancy distribution. Subsequently, a phosphate ester modifier is used to modify the surface of the polishing powder to improve particle dispersibility and slurry stability. The rare-earth-doped glass polishing powder prepared by this invention exhibits a high material removal rate (1.52-1.63 mg / min) and a low post-polishing surface roughness (1.63-1.82 nm) during glass polishing, while also demonstrating excellent dispersion stability and consistency in use. This invention is applicable to optical glass, display glass, and ultra-clear glass, and has significant industrial application value.

This invention discloses a gadolinium-erbium aluminum soft magnetic material with the chemical formula Gd 3‑x Er x Al2, wherein the rare earth elements are gadolinium (Gd) and erbium (Er), x = 0–0.5. This invention also discloses a method for preparing gadolinium-erbium aluminum soft magnetic material. This invention can obtain soft magnetic materials with adjustable Curie temperature, moderate magnetic entropy change under low magnetic fields, and high cooling capacity.

The present disclosure relates to a VCSEL device (200) comprising: a first reflector (204) and a second reflector (206) defining a laser resonator (202) between the first reflector (204) and the second reflector (206); a first electrode (212) and a second electrode (214) for supplying injection current to the laser resonator (202) to activate laser emission; and a current distribution layer (208) coupled to the laser resonator (202) and electrically connected to the first electrode (212) to provide a lateral distribution of the injection current, wherein the current distribution layer (208) consists of indium(III) oxide (In2O3), or wherein the current distribution layer (208) comprises indium(III) oxide (In2O3) doped with one or more of the elements hydrogen (H), cerium (Ce), erbium (Er) and / or tungsten (W), or wherein the current distribution layer (208) comprises or consists of gallium(III) oxide (Ga2O3).

The present invention relates to a method for producing a luminescent inorganic material based on an oxyfluoride matrix doped with multiple combinations of rare-earth ions (ytterbium (Yb), erbium (Er), thulium (Tm), europium (Eu) and neodymium (Nd)), and which contains micro- and nanostructured phases obtained using a thermal treatment. Advantageously, the material obtained using the method of the present invention generates a luminescence pattern with simultaneous emission in the near infrared spectrum and in the visible spectrum under 980 nm infrared excitation, which enables the material to be used in anti-counterfeiting security devices, such as security inks for printing textiles, paper money or printed circuits, among others.

The present invention relates to 2D multicolor rare earth chalcophosphate emitter and methods making and using same. The present invention relates to 2D multicolor rare earth chalcophosphate emitter and methods making and using same. Devices containing 2D multicolor rare earth chalcophosphates such as erbium containing crystals that have a high intensity, focused emission spectra that has minimal scattering and quenching of photoluminescence. In addition, an improved process for making rare earth chalcophosphates, such as erbium containing crystals, wherein dried metal halide powders are used is provided.

Disclosed herein are optical amplifier devices, optical amplifier assembly, and optical amplifier systems. Example embodiments may include: a plurality of input optical ports, each being configured to receive one of a plurality of input optical signals; a plurality of output optical ports, each being configured to output one of a plurality of output optical signals; a plurality of tap photodiodes, each respectively being connected to one of the plurality of input optical ports and the plurality of output optical ports; a wavelength division multiplexer configured to receive the input optical signal from each of the plurality of input optical ports and an optical input from a laser pump device and output a plurality of pumped optical signals; a plurality of erbium-doped fiber coils, each having a first end configured to receive one of the plurality of pumped optical signals and a second end configured to output an amplified optical signal; and an optical isolator configured to receive, for each of the plurality of erbium-doped fiber coils, the amplified optical signal and output the plurality of output optical signals, wherein the plurality of output optical ports are configured to receive one of the plurality of output optical signals.

This invention relates to the field of alloy materials technology, specifically to a method for preparing nickel-chromium-silicon-manganese alloy foil, comprising the following steps: S1: alloy ingot preparation; S2: hot-rolled slab preparation; S3: preliminary foil preparation; S4: nickel-chromium-silicon-manganese alloy foil preparation. In this invention, by rationally combining nickel, chromium, silicon, and manganese, nickel and chromium form a stable nickel-chromium solid solution to solidify the foundation against high-temperature oxidation; silicon combines with oxygen to form a dense silicon oxide protective film; manganese synergistically refines the oxide film structure to reduce film cracking; combined with the effects of titanium, zirconium, hafnium, and composite powder in the composite additives, both the adhesion between the oxide film and the substrate is enhanced, and the oxide film peeling off at high temperatures is inhibited. The erbium and nano-silicon carbide in the pretreated composite powder further improve the stability of the oxide film, synergistically delaying the high-temperature oxidation rate with the alloy base components, effectively improving the high-temperature oxidation resistance of the alloy foil and extending its service life under high-temperature conditions.

This invention discloses a method for improving the whiteness of aluminosilicate glass with an iron content of 150-300 ppm, comprising preparing a glass mixture: SiO2: 55%-65%, Al2O3: 9%-14.5%, Na2O: 11%-16%, K2O: 4%-7.5%, MgO: 3%-5.5%, ZrO2: 0.2%-2%, and B2O3: 0.5-5.5%, and further comprising a composite decolorizing agent consisting of cerium oxide, cobalt oxide, and erbium oxide, wherein the amount of cerium oxide added is 1... The amount of Co2O3 added is 0.5-1ppm; the amount of Er2O3 added is 100-200ppm; the raw materials are mixed in a mixing device and placed in a crucible and heated to a certain temperature for melting and forming to produce aluminosilicate glass with an iron content controlled at 150-300ppm. This can effectively improve the whiteness of the glass. With a thickness of 1.1mm, it can achieve a light transmittance T≥92%, and control the absolute value of a to within 0.012 and the absolute value of b to meet the requirements of higher-grade display glass.

This invention discloses an erbium-ytterbium co-doped phosphate-silicate core-cladding optical fiber, its fabrication method, and an optoelectronic device containing the optical fiber, belonging to the field of active optical fiber technology for optical communication. The optical fiber uses a phosphate glass core composed of 64P₂O₅-13K₂O-14BaO-2Al₂O₃-4La₂O₃-2Yb₂O₃-1Er₂O₃ moles, with an H-K8 silicate glass cladding. The core refractive index is 1.50218, the cladding refractive index is 1.4999, the outer diameter is 125±1μm, and the core diameter is 10μm, meeting the 1550nm single-mode transmission requirements. The fabrication method includes core rod preparation, cladding tube processing, preform assembly, and fiber drawing. The process is simple, controllable, and highly repeatable. The resulting optical fiber exhibits excellent thermal stability, uniform structure, and no elemental diffusion, with a transmission loss of approximately 11.96 dB / m in the 1550 nm band. This invention combines the advantages of high gain from high rare-earth doping of phosphate glass with the low-loss fusion of silicate glass and quartz. Optoelectronic devices incorporating this fiber feature an all-fiber structure, high miniaturization, and excellent laser output and sensing performance. They can be widely applied in 1550 nm band optical communication, fiber optic sensing, laser therapy, and other fields, demonstrating significant industrial application value.