24 results about "Optical modulation amplitude" patented technology

The invention discloses an automatic adaptation method and device for an optical module and a switch, the optical module, a medium and a product, and relates to the technical field of optical communication, and the method comprises the steps: determining a port connected with the switch, recognizing a port identifier of the port, and querying a target voltage optical modulation amplitude value corresponding to the port identifier according to a preset mapping table; acquiring a current temperature value, and inputting the target voltage light modulation amplitude and the current temperature value into a preset fitting function to obtain target light power; and laser is emitted to the outside based on the target optical power, so that the extinction ratios of the laser at different ports and different temperatures are consistent. The adaptability and the performance stability of the optical module are improved.

The invention discloses an extinction ratio measurement system and an extinction ratio measurement method, and relates to the technical field of optical module extinction ratio measurement. The transimpedance amplification circuit is connected with the optical module to be measured and used for monitoring the optical signal intensity of the optical module to be measured and obtaining a power monitoring voltage signal; decomposing the optical signal of the optical module to be tested to obtain a reference voltage signal and a test voltage signal; the linear output circuit is connected with the transimpedance amplification circuit and used for carrying out linear amplification on a difference value between the reference voltage signal and the test voltage signal to obtain a modulation amplitude voltage signal; and the processing circuit is respectively connected with the transimpedance amplification circuit and the linear output circuit, and is used for determining the light modulation amplitude according to the ratio of the power monitoring voltage signal to the modulation amplitude voltage signal, and determining the extinction ratio of the optical module to be detected according to the light modulation amplitude and the light power corresponding to the power monitoring voltage signal. The measurement cost of the extinction ratio of the optical module can be reduced.

The invention provides a tungsten oxide quantum dot-metal nano material photochromic composite film and a preparation method thereof. A metal nano material and tungsten oxide quantum dots are uniformly compounded by utilizing a water-soluble high polymer material. And the tungsten oxide quantum dot-metal nanomaterial photochromic composite film with more excellent photochromic performance than tungsten oxide is prepared. According to the tungsten oxide quantum dot-metal nano material photochromic composite film, the photochromic fading time is shortened to be within 2 hours, and the light modulation amplitude is gt; and the film has self-supporting performance. Compared with the prior art, the method for preparing the tungsten oxide quantum dot-metal nano material photochromic composite film is simple in process, controllable in process, free of expensive equipment and raw materials, good in process stability, high in yield and high in yield. The prepared tungsten oxide quantum dot-metal nano material photochromic composite film can be applied to any glass or resin substrate.

The invention relates to a viologen derivative electrolyte solution with an electrochromic characteristic and a preparation method and application thereof. The electrolyte solution comprises a viologen derivative and ascorbic acid, the viologen derivative is selected from 1-butyl-4, 4 '-dipyridyl or 1-butyl-1'-(2-propenyl)-4, 4 '-dipyridyl, and the viologen derivative is selected from 1-butyl-4, 4'-dipyridyl or 1-butyl-1 '-( The obtained electrolyte solution can be used for preparing an electrochromic device. Compared with the prior art, the obtained electrochromic device based on the viologen derivative electrolyte can realize color conversion from colorless or brown to purple black under relatively small voltage, and has relatively large light modulation amplitude and relatively high response speed.

Some examples described herein provide for controlling an output modulation magnitude of an optoelectronic device. In an example, a method includes transmitting a data pattern to an optical modulator device. The method further includes, for each of a plurality of heater control values of a heater thermally coupled with the optical modulator device, identifying an optical modulation magnitude corresponding to the heater control value based on a corresponding photodiode current value identified in the transmission data mode. The method further includes determining a maximum optical modulation amplitude of the optical modulator device based on the plurality of optical modulation amplitudes corresponding to the plurality of heater control values in accordance with the identification. The method further includes controlling the heater based at least in part on the determined maximum optical modulation magnitude that has been modified according to the scaled maximum photodiode current value.

The invention belongs to the technical field of micro-ring modulator optimization, and particularly relates to a micro-ring modulator feedback control system for realizing optical modulation amplitude and linearity optimization. A low-speed PAM-4 test signal easy to process is generated through a test code generation module and is pre-distorted through a feedback control module to drive a micro-ring modulator, a signal acquisition module acquires a response signal of the modulator in real time, and an eye pattern calculation module extracts current light modulation amplitude and linearity of quantitative performance from the response signal and calculates the light modulation amplitude and linearity of the micro-ring modulator. And the feedback control module synchronously adjusts the working points of the micro-ring modulator based on the indexes to optimize the light modulation amplitude, and adjusts the pre-distortion coefficient to optimize the linearity, thereby solving the problems of performance compromise and power consumption increase caused by the separation of the light modulation amplitude and the linearity optimization in the prior art. Compared with the prior art, collaborative optimization is achieved, and energy efficiency is improved while performance compromise is avoided.

The present invention provides a high modulation ratio tungsten trioxide electrochromic thin film and a preparation method thereof. The preparation method includes weighing Na2WO4·2H2O and dissolving it into a sodium tungstate solution; adding strong acid dropwise to the sodium tungstate solution for a metathesis reaction to obtain a tungstic acid solution, and then decomposing the tungstic acid solution by oil bath heating to obtain flaky WO3; drying the flaky WO3 to obtain WO3 nano powder; adding the WO3 nano powder and ITO nano powder to a film-forming agent according to a preset ratio, and after ultrasonic cleaning machine oscillation dispersion and ball milling, forming an ITO / WO3 dispersion; spin-coating the ITO / WO3 dispersion on ITO conductive glass on a spin coater and calcining to obtain an electrochromic thin film. The electrochromic thin film prepared by the present invention has a light modulation amplitude of up to 91% in the visible light band and a significantly improved coloring efficiency, and this method has a high yield and is suitable for large-scale preparation.

The application discloses a kind of double ion modified Bi2WO6 electrochromic thin film materials and preparation method thereof, and relates to the field of electrochromic thin film.The preparation method of the application includes the following steps: (1) hydrothermal controllable preparation Bi2WO6 Nanometer powder;(2) using hydrogen ion and alkali metal ion to Bi2WO6 Nanometer powder is carried out double ion replacement reaction to modify Bi2WO6 Crystal lattice structure;(3) the Bi2WO6 Nanometer powder after double ion modification is made into the nanometer dispersion liquid with good dispersibility, then double ion modified Bi2WO6 electrochromic thin film material is obtained by spin coating process.The method retains the key structural characteristics of precursor phase by soft chemical modification, and the double ion modified Bi2WO6 electrochromic thin film shows excellent electrochromic performance in near-infrared band, and the optical modulation amplitude is greatly increased.The preparation method is simple, safe and controllable, low in cost, and has wide application prospect.

This invention relates to a nickel-manganese bimetallic hydroxide / oxide electrochromic thin film, its preparation, and its application. The electrochromic thin film of this invention is directly grown on the surface of fluorine-doped tin dioxide (FTO) conductive glass via a hydrothermal method. The specific steps are as follows: First, nickel source, manganese source, urea, and ammonium fluoride are dissolved in deionized water, then transferred to a hydrothermal reactor. An FTO conductive glass is placed in the reactor with its conductive side facing down. After a period of constant-temperature hydrothermal reaction, it is naturally cooled to room temperature. The FTO conductive glass is then removed from the reactor, cleaned, and dried to obtain the nickel-manganese bimetallic hydroxide electrochromic thin film. After calcination at a certain temperature, a nickel-manganese bimetallic oxide electrochromic thin film is obtained. Compared with single nickel oxide and manganese oxide, the NiMnLDH thin film of this invention exhibits a larger light modulation amplitude in the visible light region and higher transmittance in the faded state, making it applicable to electrochromism and related fields.

Some examples described herein provide for controlling output modulation amplitude for optoelectronic devices. In an example, a method includes transmitting a data pattern to an optical modulator device. The method also includes identifying, for each heater control value of a plurality of heater control values for a heater thermally coupled with the optical modulator device, an optical modulation amplitude corresponding to the heater control value based on a corresponding photodiode current value identified while transmitting the data pattern. The method also includes determining a maximum optical modulation amplitude for the optical modulator device based on a plurality of optical modulation amplitudes corresponding to the plurality of heater control values according to the identifying. The method also includes controlling the heater based at least in part on the determined maximum optical modulation amplitude that has been modified according to scaling maximum photodiode current values.

The invention discloses a method for constructing a complementary electrochromic device based on a nickel-cobalt double-metal hydroxide film. A nickel-cobalt double-metal hydroxide (NiCo-LDH) thin film is used as a working electrode, a tungsten oxide (WO3) thin film is used as a counter electrode, a sealed cavity is formed between the two electrodes, a bistrifluoromethanesulfonimide lithium (C2F6LiNO4S2) solution is used as an electrolyte and injected into the sealed cavity, and the lithium ion battery is obtained. The invention further provides the complementary electrochromic device constructed by adopting the method. The fading state of the device is colorless, and the coloring state is dark blue. The complementary type electrochromic device has large light modulation amplitude, faster time response and higher coloring efficiency in a visible region and a near-infrared region, and compared with traditional NiO, the nickel-cobalt double-metal hydroxide film has higher theoretical specific capacity and faster ion migration rate and is used as an anode ion storage layer of the complementary type electrochromic device, so that the complementary type electrochromic device can be applied to the field of electrochromic devices. And the charge storage capability of the device can be obviously improved.

The application discloses a vanadium-tungsten bimetal oxide electrochromic film and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving ammonium paratungstate hydrate, ammonium metavanadate and oxalic acid dihydrate in deionized water to obtain a hydrothermal reaction precursor solution after stirring; and S2, performing a hydrothermal reaction on conductive glass, and thus the vanadium-tungsten bimetal oxide electrochromic film is obtained. The controllable synthesis of the vanadium-tungsten bimetal oxide film is realized by controlling the molar ratio of vanadium and tungsten in the precursor solution. The application further discloses a vanadium-tungsten bimetal oxide electrochromic film prepared by the method and an electrochromic device comprising the film. The vanadium-tungsten oxide film prepared by the application has a unique nano hexagonal star structure, high specific surface area and excellent structural stability, can not only improve the rich electrochemical reaction active sites and significantly improve the area capacitance of the film material, but also improve the cycle stability, and has a high light modulation amplitude and a high coloring efficiency.

The invention relates to a vanadium-niobium bimetallic oxide electrochromic film and a preparation method and application thereof.The electrochromic film comprises conductive glass and a vanadium-niobium bimetallic oxide film on the conductive face of the conductive glass, and the vanadium-niobium bimetallic oxide film comprises two phases of Nb2V2O9 and V3O7, comprising any one of a nano-rod structure, a nano-particle stacking structure or a nano-net structure. The preparation method comprises the following specific preparation steps: dissolving a niobium source, a vanadium source and oxalic acid dihydrate in an ethanol-water mixed solvent, and stirring and dissolving to obtain a precursor solution; inserting FTO conductive glass into the precursor solution, and carrying out solvothermal reaction; and after the reaction is finished, cooling to room temperature, cleaning and drying to obtain the vanadium-niobium bimetallic oxide electrochromic film. Compared with single niobium oxide, visible light-near infrared dual-band regulation and control can be achieved, electrochromic response is achieved in the visible light band and the near infrared band, the light modulation amplitude is large, the color changing voltage range is small, and synthesis conditions are mild.

The invention relates to a photonic system provided with a photonic chip made in silicon technology, said photonic chip (10) comprising: - a Mach-Zehnder modulator (100) whose modulation sections (105, 106) extend over a length L of less than 3 mm; - first adjustment means (107) of the operating point; - a semiconductor optical amplifier (SOA) configured to amplify a signal modulated by the Mach-Zehnder modulator, the semiconductor optical amplifier (SOA) being adapted so that the optical modulation amplitude associated with the photonic chip, when the fixed phase shift F is adjusted in the range 0.6*pi – 0.9*pi, is between -2 dBm and 6 dBm, at an output port S arranged downstream of the semiconductor optical amplifier SOA. Figure 2

An optical modulation amplitude (OMA) controller circuit includes an input port, a processing circuit, and an output port. The input port receives an average output power control setting that is used for controlling an average output power of a laser diode. The processing circuit controls an OMA signal according to at least the average output power control setting. The output port outputs the OMA signal for controlling an OMA of the laser diode.

The invention discloses a niobium-doped tungsten oxide difunctional electrochromic energy storage material as well as a preparation method and application thereof, and belongs to the field of electrochromism and energy storage. The preparation method comprises the following steps: by adopting a magnetron sputtering method, respectively taking niobium and tungsten oxide as target materials and taking mixed gas of inert gas and oxygen as working gas, depositing on the surface of the conductive glass substrate to form an amorphous niobium-doped tungsten oxide film, thereby obtaining the niobium-doped tungsten oxide difunctional electrochromic energy storage material. The electrochromic material effectively improves the electrochromic response speed of a film, has high fading state transmittance, optical modulation amplitude, charge capacity, film coloring efficiency and electrochemical cycle stability, also has low color change driving voltage and good energy storage capability, and has good application prospects when applied to zinc-induced electrochromic energy storage devices. And the electrochromic function and the energy storage function are integrated, the working state can be visually indicated through real-time color change, and the electrochromic energy storage device has important application prospects.

The invention relates to an electrochromic device based on viologen derivative electrolyte and a hydrated tungsten oxide film and a preparation method. The electrochromic device comprises an electrochromic device body with a cavity and a color-changeable electrolyte arranged in the cavity; the electrochromic device body is composed of blank transparent conductive glass and conductive glass with a hydrated tungsten oxide film. The color-changeable electrolyte includes a viologen derivative, a water-soluble metal salt, and ascorbic acid. The preparation method comprises the following steps: depositing a hydrated tungsten oxide film on transparent conductive glass; assembling the conductive glass deposited with the hydrated tungsten oxide film with blank transparent conductive glass to obtain an electrochromic device body; and injecting color-changeable electrolyte into the cavity to obtain the electrochromic device. Compared with the prior art, the electrochromic device provided by the invention can independently regulate and control the transmittance of a visible light region and a near-infrared light region, and has relatively large light modulation amplitude and an excellent color changing effect.

The invention relates to the technical field of functional materials and devices, in particular to a symmetric structure electrochromic device and a preparation method and application thereof. The symmetrical structure electrochromic device comprises a first transparent conductive substrate, a first bipolar electrochromic layer, an electrolyte layer, a second bipolar electrochromic layer and a second transparent conductive substrate which are sequentially stacked, and the first bipolar electrochromic layer and the second bipolar electrochromic layer comprise the same bipolar electrochromic material. The bipolar electrochromic material is an electrochromic material which can be colored in an oxidation state and a reduction state. The same bipolar electrochromic material is adopted in the two electrochromic layers, so that the device has large optical modulation amplitude, good stability and low driving voltage, the comprehensive performance of the electrochromic device is remarkably improved, and the electrochromic device has wide application prospects in the electrochromic field.

The present invention relates to the field of electrochromic technology, in particular to an orthorhombic phase Nb 18 V4O 55 Electrochromic film and its preparation method and application. 18 V4O 55 The electrochromic film not only has excellent electrochromic ability, but can also achieve a "warm state" mode of electrochromic dual-band regulation using the intrinsic properties of the material. It also has a large optical modulation amplitude. The electrochromic film also has the characteristics of fast kinetic response and high cyclic stability. These characteristics make it have the potential for commercial applications in smart windows, display devices and other fields.

The invention provides a WO3-gamma film based on periodic alternate oxygen supply three-path coordinated regulation and a preparation method and application thereof. According to the preparation method, periodic alternate regulation of oxygen flow is implemented in the magnetron sputtering process, so that three-path coordinated regulation of oxygen vacancies, porous morphology and an amorphous / nanocrystalline coexisting structure in the WO3 film is realized, and the electrochromic response rate and cycling stability of the film in an aqueous electrolyte are remarkably improved. The prepared WO3-gamma film has more than 70% of optical modulation amplitude, the coloring / fading response time is less than 0.03 second, and the CV curve area is still kept more than 97% after 500 cycles. The composite material has excellent electrochemical performance, structural stability and environmental friendliness, and can be widely applied to the fields of water system intelligent windows, electrochromic display, wearable devices and the like.

This invention discloses a tungsten oxide / titanium oxide (WO₃ / TiO₂) heterogeneous composite electrochromic thin film and its one-step hydrothermal preparation method, belonging to the fields of functional materials and optoelectronic technology. The method first involves heating tungstic acid and hydrogen peroxide to form a peroxytungstic acid solution, which is then mixed with acetonitrile and hydrochloric acid to prepare a stable precursor solution. Tetrabutyl titanate is pre-reacted with hydrochloric acid to obtain a titanium source solution. The two are then mixed in a specific ratio to prepare a composite precursor solution. A thin film is directly deposited on a conductive substrate using this precursor solution via a one-step hydrothermal reaction, followed by annealing to obtain the WO₃ / TiO₂ heterogeneous composite thin film. This invention achieves the synergistic growth and uniform composite of WO₃ and TiO₂ during the hydrothermal process through precise design of the precursor solution system. The process is simple, low-cost, and has good reproducibility. The resulting thin film exhibits uniform two-phase distribution and a distinct heterojunction structure, combining high optical modulation amplitude, fast response, and excellent cycling stability. The optical modulation amplitude can reach over 45% at a wavelength of 633 nm, and the retention rate exceeds 70% after 1000 cycles, making it suitable for high-performance electrochromic devices such as smart windows and displays.

Some examples described herein provide for controlling output modulation amplitude for optoelectronic devices. In an example, a method includes transmitting a first data pattern to an optical modulator device. The method also includes determining, while transmitting the first data pattern and for each heater control value of a plurality of heater control values for a heater, a photodiode current value associated with the optical modulator device to generate a plurality of photodiode current values corresponding to the plurality of heater control values. The method also includes determining a maximum optical modulation amplitude for the optical modulator device based at least in part on the plurality of photodiode current values corresponding to the plurality of heater control values. The method also includes controlling the heater for the optical modulator device based on the maximum optical modulation amplitude.

The invention provides a light modulation amplitude controller circuit, a light modulation amplitude control method and an optical system. The light modulation amplitude controller circuit comprises an input port, a processing circuit and an output port. The input port is configured to receive an average output power control setting, wherein the average output power control setting is configured to control an average output power of a laser diode. The processing circuit is configured to control an optical modulation amplitude signal according to at least the average output power control setting. The output port is used for outputting the light modulation amplitude signal to control a light modulation amplitude of the laser diode.

The invention discloses a preparation method of a porous polyaniline film and an electrochromic device, and belongs to the technical field of electronic devices. Wherein the porous polyaniline film comprises a conductive base material and a porous polyaniline coating coated on the conductive base material, an emulsifier is used for emulsifying a C4-8 alkyl alcohol pore-forming agent and then occupying, and meanwhile, a thickening agent is added to increase the viscosity, so that polyaniline coating liquid can effectively form a film on the conductive film and can assist the formation of a porous structure at the same time; and finally, volatilizing and drying to form a porous polyaniline coating with uniform pore diameter and small average pore diameter, thereby quickly preparing the porous polyaniline film. In addition, the ionic conductivity is improved by adjusting the infiltration time of the porous polyaniline thin film and the photocuring electrolyte, and after the porous polyaniline thin film and the conductive thin film are prepared into the electrochromic device, the response voltage is low, the response time is short, and the optical modulation amplitude is high.