19 results about "Coupling loss" patented technology

The application relates to the technical field of laser lighting, in particular to a non-electric manual laser switch and a using method thereof, and aims to solve the problems of poor explosion-proof performance, high laser leakage risk, large coupling loss and stray light interference of an existing laser switch. The switch is connected in series between a light fiber at a light emitting end of a laser and a light fiber at a receiving end of a lighting system, and comprises a manual operating mechanism, a double-lens assembly, a high-precision positioning pin, a light cone assembly, a stray light protection piece and a shell. The switch realizes light path on-off through pure mechanical manual operation. When the switch is turned on, the double lens is accurately aligned through the positioning pin, and laser is coupled and transmitted with low loss. When the switch is turned off, the light cone absorbs laser on the laser side, and the stray light protection piece blocks external stray light. The switch does not have any electrical components, meets the Exd IIC T6 explosion-proof grade, has a coupling loss of less than or equal to 0.2 dB, has laser leakage of less than or equal to 0.01 mW when turned off, is suitable for environments of-40 DEG C to 85 DEG C, and is suitable for explosion-proof scenes such as natural gas pipe corridors and chemical industrial parks. The switch is convenient to operate and has a long service life.

This invention belongs to the field of optical component mounting technology, specifically a real-time coaxial optical coupling loss detection and alignment system for prisms and lens arrays. It includes an automatic loading and unloading module for automatically loading the substrate, prisms, and lens arrays, and automatically sorting and unloading qualified and unqualified products. By adopting a technical solution that uses the real-time coaxial optical coupling loss detection value as the sole criterion for final alignment of the lens array, combined with a graded alignment strategy of visual coarse alignment and coaxial optical fine alignment, it solves the common industry pain point of existing pure visual alignment and passive alignment technologies that separate physical dimensional accuracy from optical performance. This results in the inability to compensate for manufacturing errors such as uneven refractive index and surface flatness deviations within optical components, leading to substandard optical performance despite meeting physical accuracy standards and low yield rates in mass production. By using dimensional and angular tolerances only as auxiliary constraints, it directly locks the global minimum coupling loss point, improving the consistency and stability of the product's optical performance.

This invention relates to the field of polymer waveguide fabrication technology, specifically disclosing a method for processing a 45° micromirror on the end face of a polymer waveguide, comprising the following steps: Step S1: Determining the forming quality characterization of the 45° micromirror on the end face of the polymer waveguide; Step S2: Determining the initial range of influencing factors affecting the quality of the 45° micromirror on the end face of the polymer waveguide fabricated by femtosecond laser; Step S3: Determining the laser incident mode, using a waveguide substrate tilted at 45° to the horizontal plane, with the laser incident perpendicular to the horizontal plane; Step S4: Optimizing the influencing factors to obtain the optimal parameter combination; Step S5: Conducting experiments with the optimal parameter combination, detecting and analyzing the experimental results. The femtosecond laser fabrication of the 45° micromirror on the end face of the waveguide of this invention results in small surface roughness and angle deviation, leading to higher integration, greater transmission efficiency, and lower coupling loss in the link formed by coupling the polymer waveguide and optical transceiver devices.

A method for performing in-band spectrum sharing in a mixed TN-NTN system is provided. The method is performed by a user equipment (UE). The UE receives reference signal (RS) configuration information from a satellite or TN base station and obtains measurement results indicative of coupling loss or interference based on the RS configuration. The UE transmits a measurement report to the satellite or an uplink RS to the TN base station for resource allocation decisions. The UE operates according to resource allocation results indicating a partition of shared radio resources across frequency, time, or polarization domains to mitigate interference. Finally, the UE communicates using the allocated resource portion of the shared radio resources.

This invention discloses a thin-film lithium niobate silicon optical integrated chip and its fabrication method. The thin-film lithium niobate silicon optical integrated chip sequentially comprises a metal-free silicon photonic base chip, a thin-film lithium niobate waveguide layer bonded thereon, a silicon dioxide cladding covering the chip, and at least two functionally separated metal layers located above the cladding. The first metal layer serves as an electrical contact and modulation electrode, and the second metal layer is interconnected with the first layer via a visor and serves as a traveling wave electrode. The fabrication method is used to fabricate the thin-film lithium niobate silicon optical integrated chip. Advantages: In this invention, the silicon photonic base chip does not contain any metallization layer (except for metal silicides) before bonding to the thin-film lithium niobate layer, thus ensuring the flatness of the bonding interface and bonding quality, and reducing interlayer coupling loss.

This invention provides a method for forming a waveguide structure and a blazed grating. The method for forming the waveguide structure includes: step S11: providing a silicon material layer; step S12: etching a portion of the silicon material layer to form multiple steps on the surface of the silicon material layer; step S13: oxidizing the surface of the silicon material layer using a thermal oxidation process to form a silicon oxide layer; step S14: wet etching the silicon oxide layer; step S15: repeating steps S13 to S14 to make the surface of the stepped silicon material layer become a smooth slope shape. In the waveguide structure of this invention, the smooth slope of the silicon material layer can form a waveguide structure with gradually varying thickness, thereby reducing coupling loss.

In improving the power reception efficiency of wireless power transmission systems, optimizing the operation of rectifier circuits using MPPT control presents challenges depending on the magnitude of the received power, such as increasing the size of the circuit and imposing high voltage resistance requirements on the rectifier and charge control circuits. Furthermore, even if optimal operation of the rectifier circuit can be achieved, optimizing the charging of the energy storage elements remains difficult. Moreover, even with power transmission using retrodetective methods, measures are needed to ensure that the power is received without loss by the receiving antenna and to prevent a decrease in power reception efficiency. [Solution] Prioritizing the optimization of the rectifier circuit's operation, the charging current control unit sequence-controls the charging current of the linear charging control unit to maintain the burst mode operation of the buck-boost converter. Furthermore, the antenna system for receiving circularly polarized high-frequency power is arranged and grouped along the rotation direction of the circular polarization to connect the output voltages from each rectifier circuit in parallel without coupling loss and output them to the charging control unit.

The application discloses a kind of high ripple rejection common mode inductance for data center power supply and processing device, belong to common mode inductance technical field;It includes framework, two magnetic cores are fixedly connected in the framework symmetrically, multiple windings are woundly connected to the two magnetic cores, the end of multiple windings is fixedly connected with framework, and the end of multiple windings is fixedly connected with pin, two fixed clamping plates are fixedly connected on the both sides of the framework, two fixed clamping plates are commonly sleeved with fixed bolt, and fixed nut is threadedly connected outside the fixed bolt.The segmented structure of the application reduces the interlayer parasitic capacitance of winding, reduces the coupling loss of high-frequency signal, so that the inductance can maintain stable filtering performance in a wide frequency range, and the close arrangement of segmentation and layering makes the winding fit more firmly, reduces the vibration and howling caused by magnetostriction, and is especially suitable for high-power, high-ripple application scenarios.

The application provides a Q-switching device for a waveguide CO2 laser, which can improve Q-switching output peak power, output stable and reliable high-quality light beams for a long time, and is beneficial to miniaturization of the laser. The application is suitable for the waveguide CO2 laser, the stroke of the piezoelectric ceramic can be changed between dozens of microns and dozens of millimeters, and the stroke distance is precisely controlled in a closed loop by a ceramic controller, so that the Q-switching is easily realized, the application has a simple structure, does not need to insert a complex Q-switching element in a resonant cavity, the coupling loss of a waveguide port is greatly reduced, and the Q-switching output peak power is improved. The piezoelectric ceramic has the characteristics of high precision, good stability and long service life, so that the stable and reliable high-quality light beams can be output for a long time, the piezoelectric ceramic has a small volume, the overall structure of the laser is more compact, and the miniaturization of the laser is beneficial.

Compensator (40) for compensating for line and / or coupling losses when connecting a mobile communication device (10) to an external antenna structure (50, 60), in particular to an external vehicle antenna structure, wherein the compensator (40) has a first signal path (41) for connecting the mobile communication device to a first external antenna (50) of the external antenna structure (50, 60), wherein the compensator (40) has a second signal path (42) for connecting the mobile communication device to a second external antenna (60) of the external antenna structure (50, 60), characterized in that the signal processing in one of the two signal paths (41, 42) is dependent on the signal processing in the other signal path (42, 41) and / or dependent on measured values ​​determined in the other signal path (42, 41).

This application relates to the field of radio frequency medical technology, specifically to an intelligent radio frequency energy-assisted regulation method based on impedance spectrum feedback. The method includes: in the radio frequency energy transmission of a medical device, acquiring the capacitance control quantity of the impedance matching network for each frequency band in each control cycle; applying a perturbation to the capacitance control quantity of each frequency band; determining the self-channel response gradient of each perturbed frequency band and the cross-channel coupling gradient of each perturbed frequency band to the remaining frequency bands; determining the coupling loss ratio of each frequency band; obtaining the deterioration trend value of each frequency band; determining the nonlinear coupling risk degree of each frequency band; and updating the capacitance setting value of each frequency band in the next control cycle accordingly, thereby driving the impedance matching network to perform regulation. This application improves the energy transmission efficiency and dynamic matching stability of multi-band radio frequency energy harvesting technology under dynamic nonlinear power environments.

This disclosure provides a dual parallel slit waveguide mode converter and its fabrication method. The device includes: a substrate, a buried oxide layer formed on the substrate, and a chip layer formed on the buried oxide layer. A waveguide structure is etched on the chip layer from one end to the other. The waveguide structure includes a periodic grating, a transition region, and an active modulation region connected sequentially. A dual parallel slit structure is formed in the active modulation region. The periodic grating is used to convert light into vertically coupled emission, and the transition region and active modulation region are used to convert the optical field mode in the waveguide structure into a dual-slit waveguide mode. This dual parallel slit waveguide mode converter has high coupling efficiency, low coupling loss, and small device size, making it easy to package.

This application relates to the field of integrated photonic device technology, and more specifically, to a broadband high-linearity optical device and its fabrication method. The broadband high-linearity optical device includes a mode converter, a semiconductor optical amplifier, and a DFB semiconductor laser integrated on the same substrate and connected sequentially. The DFB semiconductor laser includes, from left to right, an electrically absorbed modulation region, an electrically isolated region, a grating region, and a waveguide region. The electrically isolated region is coupled to the semiconductor optical amplifier, and the grating structure of the grating region is a curved grating. This invention significantly reduces optical field coupling loss by monolithically integrating an electrically absorbed modulation DFB semiconductor laser and a semiconductor optical amplifier; it significantly extends the Bragg reflection bandwidth by utilizing a curved grating structure with a gradually changing duty cycle, and combined with the optical amplification effect of the semiconductor optical amplifier, improves the device's modulation bandwidth.

This utility model relates to an integrated module for a polarization-independent optical circulator and filter, comprising a first collimator, a circulator core, a second collimator, and a third collimator. This utility model employs a first corner prism, a second corner prism, a first filter, a second filter, and a first and second collimator in combination, reducing the number of collimators used. The application of the first and second corner prisms ensures that the angle of the signal light emitted from the corner prism remains unchanged even when the angle of the corner prism changes during actual assembly and use, reducing angular coupling loss and improving the stability and reliability of assembly and use. This design makes the optical path layout of the device more compact, reduces the number of required optical components, and simultaneously improves the reliability and stability of the product.

The invention provides an optical module, an optical coupler and a preparation method of the optical coupler. The optical module comprises an optical chip, an optical fiber array and an optical coupler. The optical coupler comprises a substrate, a refractive index difference layer and a transmission waveguide layer. The optical coupler comprises a coupling waveguide located in the transmission waveguide layer, the first end of the coupling waveguide faces the optical fiber array, and the second end of the coupling waveguide faces the interior of the optical chip. The width of the coupling waveguide tends to increase in the direction from the first end to the second end. The optical coupler comprises a first limiting waveguide and a second limiting waveguide. The first limiting waveguide comprises a first inclined plane, and the first inclined plane gradually inclines in the direction away from the central axis of the coupling waveguide so as to gradually increase the distance between the first inclined plane and the coupling waveguide and reduce the coupling loss between the first limiting waveguide and the coupling waveguide. The second limiting waveguide comprises a second inclined plane, and the second inclined plane gradually inclines in the direction away from the central axis of the coupling waveguide, so that the distance between the second inclined plane and the coupling waveguide is gradually increased, and coupling loss between the second limiting waveguide and the coupling waveguide is reduced.

This invention provides an adaptive optimization method for antennas based on a multi-objective algorithm. The antenna includes a radiating substrate, a grounding substrate, and an impedance transition interlayer. The optimization method comprises the following steps: obtaining the size of the hollow radiating slot, fine-tuning the distribution density of the protrusions, and the angle between the two surfaces, and constructing a coupling correlation matrix; calculating real-time coupling loss based on the coupling correlation matrix; collecting operating condition data of the antenna during operation, correcting polarization interference and radiation distortion using the operating condition data, obtaining the corrected polarization interference and corrected radiation distortion, and comparing and verifying them through preset quantization constraints; constructing a multi-objective optimization function with the objectives of minimizing coupling loss, minimizing radiation distortion, and optimizing impedance matching; calling the multi-objective optimization function to optimize parameters when verification fails; and fine-tuning the size of the hollow radiating slot, the distribution density of the protrusions, and the angle between the two surfaces based on the optimal parameter combination to improve the antenna's operational stability and adaptability to operating conditions.

This invention relates to a socket and an optical waveguide connector. The socket has a first mating end for mating with a compatible plug, and a second mating end fixed to the waveguide input or output end of an optical waveguide printed circuit board (PCB). The socket contains an optical fiber contact; the first mating end of the optical fiber contact mates with the MT contact in the plug, and the second mating end mates with the waveguide port on the PCB. The waveguide port and the MT contact in the plug are interconnected through the optical fiber contact. The socket of this invention has one end fixed to the PCB and does not require insertion or removal, while the other end can be repeatedly inserted and removed from the plug. Signal interconnection between the optical waveguide and the plug's optical fiber is achieved through the insertion and removal of the socket and plug, improving the pluggability of the PCB and solving the problem of severe wear on the waveguide end face and high coupling loss caused by frequent insertion and removal, which affects waveguide transmission performance.

The application relates to a silicon optical chip-based flip coupling device and method, and belongs to the technical field of optical communication. The device comprises a coupling table, which comprises a platform for placing a PCB board, and the platform is provided with an observation hole for observing an end face coupling waveguide of a silicon optical chip. An image information of the end face coupling waveguide of the silicon optical chip exposed by a light transmission hole on the PCB board can be acquired through the observation hole on the platform by a first visual camera of an observation mechanism, so that the operator can also obtain a visual field when the chip is flipped, and then the fiber array can be conveniently and quickly adjusted to be aligned with the end face coupling waveguide of the silicon optical chip, the operator is prevented from blind adjustment, the difficulty of optical interconnection between the fiber and the optical integrated chip is reduced, the coupling precision is high, the coupling loss is small, the coupling position is exposed downward, the difficulty of dropping optical path refractive index matching glue during the coupling process is also reduced, the coverage and filling conditions of the optical path refractive index matching glue are observed conveniently, and the coupling efficiency and product quality are improved.

The application provides a preparation method of a silicon optical chip, comprising the following steps: selecting a wafer and performing a planarization treatment on the wafer; exposing a target component on the wafer and performing a developing treatment; etching a silicon waveguide, a sidewall air groove and a heat conduction via on the wafer; preparing a double gradient structure on an AWG chip output end, and preparing a heating resistor and a wavelength calibration electrode; depositing a passivation layer and etching a window on the wavelength calibration electrode; grinding a wafer surface, and performing a laser cutting on the wafer to obtain a silicon optical chip. The preparation method of the silicon optical chip provided by the application cancels a separate coupling link, simultaneously defines MRM arrays and all patterns of the AWG chip through one mask and one electron beam exposure, eliminates coupling loss caused by multiple alignment and splicing between separate devices from the source, and improves the integration of the silicon optical chip.