512 results about "Integrated optics" patented technology

The invention relates to an optical engine and a forming method thereof, the optical engine comprises an adapter plate, an electric chip, an optical chip and a packaging substrate, the adapter plate comprises a first surface, a second surface opposite to the first surface, and a first through hole penetrating through the first surface and the second surface, the first surface of the adapter plate and the front surface of the electric chip are mounted on the optical chip and are electrically connected with the optical chip, and the second surface of the adapter plate is mounted on the packaging substrate and is electrically connected with the packaging substrate. According to the 3D fan-out type packaging optical engine integrated with the TSV adapter plate, the problems that an existing 3D fan-out type packaging optical engine is large in module size and cannot support the extremely high number of channels can be solved at the same time, and the problems that an existing 3D integrated optical engine with the TSV is high in cost and chip incoming materials are fixed can be solved at the same time.

Silicon photonics technologies adds integrated optics functionality to CMOS integrated circuits thereby leveraging high volume manufacturing. Independent of geometry or technology these silicon photonic devices require packaging with single mode optical fibers to interface to the optical network and / or co-packaging with active semiconductor devices, discrete microoptoelectromechanical systems (MOEMS) s or monolithically integrated MOEMS. Stringent performance constraints and minimizing manufacturing costs / times are consistent demands on such photonic circuits. Accordingly, there is a demand for low-cost and low-loss optical coupling technologies for packaging that can easily be scaled for mass production that overcome limitations in the prior art. The inventors have established design methodologies, packaging schemes and component designs that leverage automated passive assembly techniques for speed / cost in combination with directly written optical interconnects that allow for offsetting the losses that would arise from the manufacturing tolerances of these passive assembly techniques.

The invention discloses a preparation method of a lithium niobate film waveguide frequency doubling device based on ferroelectric domain regulation and control. The method comprises the following steps of: spin-coating photoresist on the surface of a lithium niobate film, transferring a pattern by utilizing a photoetching technology, coating a film, stripping to form an electrode, applying high-voltage electric pulse to the electrode, and controlling the size of an electric field in the lithium niobate film and a reversal domain growth process through the material and the thickness of an insulating layer in the electrode, thereby controlling the reversal depth of a ferroelectric domain. And finally, spin-coating the photoresist again, transferring the pattern by photoetching, and performing dry etching to obtain the frequency doubling waveguide device. The frequency multiplication waveguide device preparation method provided by the invention has the characteristics of simple processing method, high device preparation efficiency and low loss, and meets the actual requirements in the fields of nonlinear optics, integrated optics and the like.

The invention belongs to the technical field of integrated optics and inertial sensing, and particularly relates to a thin-film lithium niobate heterogeneous integrated chip configuration for a fiber-optic gyroscope. The thin-film lithium niobate hybrid photon integrated chip is utilized to realize on-chip heterogeneous integration of functional devices of the fiber-optic gyroscope. The discrete optical path device of the gyroscope is monolithic integrated and integrally packaged, the size and cost of the optical path are greatly reduced, optical fiber interconnection is reduced, the complexity of the assembly process is obviously reduced, and the long-term reliability of the performance of the gyroscope is effectively improved. By means of the CMOS technology with mature silicon photons, low-cost and large-scale batch production of the miniature fiber-optic gyroscope can be achieved, and the requirements for miniaturization and light weight of a future weapon system are met.

A method includes forming a package, which includes an optical die and a protection layer attached to the optical die. The optical die includes a micro lens, with the protection layer and the micro lens being on a same side of the optical die. The method further includes encapsulating the package in an encapsulant, planarizing the encapsulant to reveal the protection layer, and removing the protection layer to form a recess in the encapsulant. The optical die is underlying the recess, with the micro lens facing the recess.

A near-eye display system includes a waveguide having an incoupler configured to receive display light from an optical engine and to redirect the display light into the waveguide. The display system includes one or more integrated optical elements that are each configured to receive the display light and to apply a first optical function to the display light. The waveguide may include one or more encapsulation layers to encapsulate the incoupler and / or at least one of the integrated optical elements.

The invention discloses a multi-parameter coupling detection method of an integrated optical sensor and related equipment. The detection method comprises the following steps: injecting different trace medicament combinations into a to-be-detected sample in a plurality of micro-fluidic sub-channels according to a preset time sequence; performing phase shift coding acquisition on the differential optical response signal, splitting a broadband light source into a plurality of wavelength subintervals, and generating a coded light signal with a preset phase shift amount; calculating a cross-correlation function between the channels, and performing signal amplification or suppression processing on the channel group with high coupling degree; multi-dimensional feature extraction is carried out, and the differential interference amount, the amplitude ratio and the phase synchronization degree between channels are calculated; baseline drift and noise distribution are monitored in a preset time window, and parameter adjustment is carried out; and performing self-learning evaluation on the detection data, updating identification model parameters, and generating a multi-parameter fingerprint spectrum. According to the technical scheme, the problems of signal aliasing and insufficient sensitivity in multi-parameter detection are effectively solved, and high-precision synchronous detection can be carried out on various target objects.

The invention provides a coastal wetland ecological corridor identification and optimization method and system, and relates to the technical field of ecological environment monitoring. The method comprises the following steps: integrating optical, radar, terrain, night light and road data on an earth engine cloud platform, and unifying time and space references to form an initial data set; extracting a normalized vegetation index and a vegetation coverage degree, and combining with a water body frequency to identify an ecological source land; generating a comprehensive resistance surface according to the land utilization and coverage type and the road distance; and performing minimum cost path and circuit connectivity analysis in a geographic information system to obtain potential galleries, key nodes and barrier regions, and outputting gallery grades and optimization suggestions in a grading manner according to a cost threshold, thereby realizing high-precision identification and optimization of the coastal wetland ecological network.

High-power, integrated optical amplifiers are described in which gain waveguides of the amplifiers are designed to improve power performance by reducing power saturation effects in the amplifier. The gain waveguides can change, in at least one aspect, along the length of the gain waveguide to reduce gain saturation. Multi-mode optical beams and / or multi-stage amplification can also be employed to reduce gain saturation.

A disclosed semiconductor photodetector includes a first semiconductor layer having a first refractive index and a first band gap; a second semiconductor layer formed on the first semiconductor layer, the second semiconductor layer having a second refractive index and a second band gap; a first electrode; and a second electrode. The second refractive index is greater than the first refractive index, and the second band gap is smaller than the first band gap. The first semiconductor layer includes a p-type first region, an n-type second region, and a non-conductive third region between the first region and the second region. The second semiconductor layer includes a p-type fourth region in ohmic contact with the first electrode, an n-type fifth region in ohmic contact with the second electrode, and a non-conductive sixth region between the fourth region and the fifth region.

The invention discloses a polarization rotation beam splitter structure based on a lithium niobate film, belongs to the technical field of optical waveguides, and particularly relates to an integrated optical device for realizing polarization rotation and beam splitting of optical signals. The main structure is two linear tapered waveguides and an asymmetric coupler, the structure utilizes the excellent electro-optical characteristics of a lithium niobate film, and through the design of the linear tapered waveguides and an asymmetric directional coupling unit, when light is transmitted along the tapered waveguides which are gradually increased, due to the hybridization between modes, the light transmission efficiency is improved, and the light transmission efficiency is improved. The TM0 mode of narrow band import emission is gradually converted into the high-order TE1 mode, the high-order TE1 mode is coupled through the asymmetric coupler and converted into the TE0 mode to be output, efficient polarization rotation and beam splitting functions between the TM mode and the TE mode are achieved, and potential application prospects are achieved. The polarization rotation beam splitter not only realizes simplification of a device structure, is expected to be applied to efficient polarization multiplexing and polarization modulation, but also provides flexibility for manufacturing a large-scale optical switch array and an optical interconnection network.

The invention discloses a laser design system, a laser design method, electronic equipment and a medium, and belongs to the technical field of integrated optics. The laser design system comprises a first model, input parameters of which comprise set grating parameters of a grating structure of a first to-be-designed laser, and which is used for predicting and outputting a predicted output characteristic curve of the first to-be-designed laser based on the set grating parameters; the input parameters of the second model comprise a set output characteristic curve of a second laser to be designed, and the second model is used for predicting and outputting predicted grating parameters of a grating structure of the second laser to be designed based on the set output characteristic curve; the first model and the second model share the same training data set, the input training data of the first model corresponds to the output training data of the second model, and the output training data of the first model corresponds to the input training data of the second model; the training data set includes pairing data between grating parameters of a grating structure of the sample laser and an output characteristic curve of the sample laser.

Provided is an integrated optical system-based optical current sensor system comprising a light source generating reference light for current or magnetic field sensing, a polarizer for polarizing the reference light, a phase modulator for phase-modulating the polarized light into a predetermined reference signal, and a Faraday rotation reflector for reflecting the light propagated through an optical path at the end of the optical fiber, wherein the invention further comprises a plurality of pig-tailed optical fiber blocks in which the optical fibers are accommodated therein, and an integrated optical system composed of a plurality of optical components optically bonded to the pig-tailed blocks at interfaces with the pig-tailed blocks.

The invention relates to the field of performance testing of high-precision fiber-optic gyroscopes, and discloses an automatic testing method and system for the extinction ratio of a high-precision fiber-optic gyroscope, and the method comprises the following steps: constructing a signal light path and a reference light path, and combining the output light of the signal light path and the reference light path into a combined light signal in an orthogonal polarization state; integrally measuring the extinction ratio of the combined optical signal by using an extinction ratio tester to obtain a measured value; the control unit compares the measured value with a target value of 0dB and generates a control instruction based on a difference value; the voltage controller automatically adjusts the voltage of the integrated optical modulator in the signal light path according to the instruction, and iterative optimization is carried out through closed-loop feedback until the actually measured extinction ratio reaches a target value; and finally recording and solidifying the optimal voltage value. According to the invention, single and accurate extinction ratio overall measurement is used for replacing two times of error-prone independent optical power measurement, full-automatic closed-loop control is realized, the precision, efficiency and consistency of optical power balance are remarkably improved, and the skill requirements on operators are reduced.

Aspects of the present disclosure provide a semiconductor structure. For example, the semiconductor structure can include a wafer and luminescent thermometers formed on a surface of the wafer. The luminescent thermometers can be configured to receive incident light and emit light. The emitted light can have an intensity that depends on a temperature of a portion of the surface of the wafer where the luminescent thermometers are formed.

The invention relates to the technical field of material physicochemical property testing and analysis, in particular to a biological tissue anatomy quality evaluation method based on multi-modal data fusion. Comprising the following steps: step 1, synchronously acquiring multi-modal data of spatial registration, and synchronously acquiring data under the same coordinate system through a spatial registration device integrated with an optical path; based on the coordinate mapping relation, resampling the mechanical distribution diagram and the topological model to a spatial grid of the hyperspectral data; step 2, performing pathology-oriented feature fusion; and step 3, generating an anatomical quality index, inputting the fusion feature vector into a pre-trained deep residual network, outputting a quality evaluation index QI, generating an anatomical quality thermodynamic diagram based on a resampling space grid coordinate, and marking a QI value of each region. By realizing accurate and synchronous acquisition of multi-modal data, pathological-oriented feature extraction and fusion and quality evaluation of a deep learning network, the method can more accurately and comprehensively evaluate the anatomical quality of the biological tissue.

The invention relates to the technical field of photoacoustic spectrometry, in particular to a gas detection device and method based on a 3D printing Helmholtz photoacoustic cell, and is suitable for the fields with load requirements such as unmanned aerial vehicle-mounted gas monitoring platforms. In order to overcome the problems of large volume, heavy weight, complex structure and low integration level of a photoacoustic gas sensor in the prior art, the lightweight Helmholtz photoacoustic cell structure manufactured based on 3D printing comprises a sound wave generation cavity, a small-diameter connecting pipe and a detection cavity which are integrally formed, an optical reflection unit is integrated in the sound wave generation cavity, and the optical reflection unit is integrated in the detection cavity. Two concave reflectors are arranged to reflect incident light beams for 160 times, a laser, an optical fiber collimator, a pre-amplifier, a lock-in amplification circuit board, a notebook computer and a current temperature control module are arranged outside, and the concentration of gas to be detected is obtained through analysis and processing of the notebook computer.

The invention discloses a broadband integrated polarization rotation beam splitter based on a complex linear gradient structure, which belongs to the technical field of integrated optical devices and comprises a substrate layer and a dielectric waveguide layer. A buried oxide layer is arranged between the substrate layer and the dielectric waveguide layer, upper cladding layers are arranged on the upper surface and two sides of the dielectric waveguide layer, and an input spot size converter, a mode evolver, a directional coupler and two output spot size converters are etched in the dielectric waveguide layer along the light wave transmission direction; and a bent waveguide is etched between the directional coupler and the first output spot size converter. The mode evolution effect and the mode hybridization phenomenon are utilized, the linear structure of the mode evolver is designed, the mode evolution efficiency is improved, separation of a TM0 component and a TE0 component in input light is achieved, the TM0 component is rotated, and pure TE0 light is obtained.

The invention discloses an intelligent pressure plate remote monitoring system based on double-confirmation detection synchronization, which comprises a non-contact sensing mechanism, integrates state double confirmation of optical detection and magnetic induction detection, performs double judgment of a pressure plate state and critical position judgment through synchronous boundary dynamic verification, and comprises an intelligent pressure plate assembly, a remote monitoring system and a remote monitoring system, the optical detection assembly controls on-off of an optical path through switching of the transparent area and the shielding area of the light guide column so as to identify the rotation angle of the pressing plate. The guide rail type sensor array detects the induction stroke of the pressing plate through magnetic induction of the magnetic induction piece, and the magnetic induction boundary of the magnetic induction switch is dynamically synchronous with the light path switching boundary of the light guide column; a wireless collector; the pressing plate control device is further in wireless communication with the wireless collector, and the pressing plate control device carries out synchronous boundary logic processing on the double-confirmation signal and outputs a double-confirmation state; provided is a pressing plate management system. Through the arrangement, the problem of asynchronous signal induction of detection of different sources in a pressing plate double-confirmation detection scheme is solved.

The invention provides an on-chip optical element, a preparation method thereof and an integrated optical element. The on-chip optical element comprises a substrate, an input coupling waveguide located on the substrate, an output coupling waveguide located on the substrate and a modulation structure. The modulation structure comprises a phase change material layer located on the substrate, the phase change material layer is a continuous film layer and comprises a plurality of units, and the refractive indexes of at least two units are different; and the input coupling waveguide and the output coupling waveguide are respectively positioned at the side parts of the modulation structure, so that light rays emitted to the modulation structure through the input coupling waveguide are propagated along a direction parallel to the surface of the phase change material layer. The integrated optical element includes the on-chip optical element.

The invention discloses an integrated optical chip, a preparation method and an optical gyroscope, the integrated optical chip comprises a first device layer and a second device layer, the first device layer is provided with a phase modulator, the phase modulator comprises two fourth waveguides used for being connected with an interference ring, the second device layer is provided with a detection unit, and the detection unit comprises two fourth waveguides used for being connected with the interference ring. The detection unit comprises a first coupler and a detector, the first coupler comprises a first waveguide, a second waveguide and a third waveguide, the first waveguide is used for connecting a light source, the first waveguide is connected with the third waveguide, the second waveguide is connected with the third waveguide, and the third waveguide is connected with the phase modulator; the detector is connected with the second waveguide; wherein a light beam is transmitted to the phase modulator through the first waveguide and the third waveguide and is transmitted to the interference ring through the phase modulator, and a test light beam transmitted back by the interference ring is transmitted to the detector through the third waveguide and the second waveguide.

The invention discloses a diamond on-chip integrated laser and a preparation method thereof, and relates to the technical field of integrated optics, and the on-chip integrated laser comprises a high-power semiconductor laser, a diamond substrate and a waveguide. Wherein the same diamond substrate is divided into a laser integration area and a waveguide integration area; the high-power semiconductor laser is integrated in the laser integration area of the diamond substrate through a thin film circuit; the waveguide is integrated in the waveguide integration area and comprises a waveguide material layer, diamond films are evenly plated on the upper portion and the lower portion of the waveguide material layer and the surfaces of the two sides, in non-laser coupling with the high-power semiconductor laser, of the waveguide material layer, and the end, not plated with the diamond films, of the waveguide material layer is aligned with a light outlet of the high-power semiconductor laser. According to the invention, the luminous efficiency of the integrated optical chip is improved, the thermal crosstalk problem of the chip is solved, and the stable output of the whole laser is ensured.

The invention discloses a PUF (Physical Unclonable Function) device based on an integrated optical microcavity and an encryption method thereof. The PUF device comprises a chip substrate; the chip lower cladding covers the surface of the chip substrate, and the input coupling grating, the trunk input waveguide and the optical microcavity at least comprise one form are arranged on the surface of the chip lower cladding; the nano scatterer is arranged in the optical microcavity; and a light excitation and acquisition assembly. According to the encryption method, two feature extraction schemes are provided based on scattering imaging, so that the secret key is convenient to expand. One method is a spectrum method obtained by extracting information based on a scattered spectrum excited by a device in a certain wave band range; one method is an image method for extracting information based on a specific wave band microcavity vertical surface scattering image. According to the image method, information extracted from a two-dimensional area of a light field serves as an additional multiplexing means to enrich a random source of a device, and the safety of the system can be improved. The invention provides the PUF device which is reliable, low in cost and capable of being manufactured in a large scale and the encryption method of the PUF device.

The invention belongs to the field of integrated photonics, and discloses a dynamic configuration device and method of an integrated optical processor chip. The configuration device comprises a signal acquisition module and a feedback configuration module, and the signal acquisition module detects an output signal of the integrated optical processor chip, processes the output signal into an electric signal and transmits the electric signal to the feedback configuration module; and the feedback configuration module processes and analyzes the electric signal based on a hybrid cooperation algorithm to generate a feedback control signal, and the feedback control signal is applied to a regulator of the integrated optical processor chip to influence the state of the regulator so as to realize dynamic configuration of the integrated optical processor chip. Compared with existing manual configuration, offline design and other methods, the method realizes real-time state mapping and dynamic configuration of the integrated optical processor chip, is a key technology for promoting practical application of the integrated optical processor chip, and is worthy of popularization and application.

The invention belongs to the technical field of integrated optics and inertial sensing, and particularly relates to a full-on-chip integrated photon chip gyroscope. The active devices integrated on the silicon-based heterogeneous integrated chip comprise an SLD light source, a thin film lithium niobate modulator and a detector; the passive device integrated on the silicon-based heterogeneous integrated chip comprises an isolator, a one-to-two coupler, a polarizer, a one-to-two coupler and an on-chip waveguide ring; the silicon-based heterogeneous integrated chip is also integrated with a spot size converter, a bending waveguide, a bending waveguide and a spot size converter.

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

A calibration system and related methods for optical phased array chips. The calibration system includes an adjustable mount module, an infrared microscopic observation module, an arrayed driver module, a two-dimensional laser beam scanning module, a photoelectric conversion module and an upper computer, and utilizes computer-vision-enabled positioning and phase error compensation algorithms as software components. Collimated laser is emitted from the target beamforming angle and aimed at the emission aperture of the chip, and is subsequently sampled by the array elements in a reversed injection manner. Based on the reciprocity of light propagation, by maximizing the power reversely output from the bus waveguide of the optical phased array chip, beamforming at the target angle is achieved supported by software implementations of optimization algorithms. The system and related methods are readily achievable, highly automated, and offers fast and batch calibration with relatively low expenses, good flexibility and long-term compatibility.

A lamp for a vehicle and a method therefor are provided. The lamp includes optical systems to form a beam pattern by irradiating light onto a road surface, and an assembly unit to assemble and integrate the optical systems. Each of the optical systems includes: a light source part to generate light; a condensing lens part provided on a front side of the light source part to condense and output the light input from the light source part; a shield part formed to shield a portion of the light input from the condensing lens part; and an output lens part to output the light passing the shield part to the road surface. The beam pattern includes unit pattern areas formed by the optical systems, respectively, and orientation angle of light output from each of the optical systems on to the road surface is different from one another.

The present disclosure relates to integration of integrated photonics-based optical gyroscopes and fiber-based optical gyroscopes into portable apparatuses that may include compass features. Novel small-footprint modularized fully integrated photonics optical gyroscopes are used for non-critical axes. However, for at least one critical axis, a fiber-optic gyroscope can be used to provide bias stability below 0.1° / Hr, which is directly correlated to predicting positional accuracy in the centimeter range. The positional accuracy results from the compassing ability of the gyroscope (referred to as gyrocompass) to calculate direction of heading using the earth's rotation.

A photonic integrated circuit including at least one integrated optical gain section having a peak gain at a first frequency; and at least one nonlinear sub-circuit which is coupled to the optical gain section either evanescently or through edge coupling, wherein the nonlinear sub-circuit further comprises at least one nonlinear component comprising at least one of a waveguide or a resonator comprising second-order nonlinearity enabling generation of frequency components at least one octave below or above the first frequency, and the nonlinear sub-circuit is configured to provide at least one of nonlinear interferometry wherein the interferometer output depends on the input intensity to the nonlinear sub-circuit, or spectral broadening by extending the spectrum outside the gain spectrum of the gain section.