296 results about "Light modulation" patented technology

A head-up display (HUD) and its image generating apparatus are disclosed. The image generating apparatus includes a light source module, an illumination element, and a light modulation module. The light source module provides a first color beam and a second color beam at different times. The illumination element homogenizes the first color beam and the second color beam to form a first color illumination beam and a second color illumination beam, which are then transmitted to the light modulation module. A first gap distance exists between the light modulation module and the illumination element, and the light modulation module includes a plurality of pixel units arranged in an array. Each of these pixel units can be in an on or off state and receives the first color illumination beam and the second color illumination beam at different times to convert the first color illumination beam or the second color illumination beam into an image beam. The image generating apparatus of the present invention can reduce the risk of overheating and improve optical efficiency.

A photonic random access memory employs series connected photosensors to define switching nodes driving optical modulators, the series connection operating to reduce the effect of photosensor dark current.

A waveguide structure and an optical modulator structure of a photonic integrated circuit are formed in a dielectric region above a substrate of a semiconductor device. Openings are then formed through the dielectric region and to the substrate so that material can be removed from the substrate to form air gaps between the substrate and the dielectric region. The openings are then sealed by depositing dielectric material in the openings. Sealing the openings reduces the likelihood of exposure of the dielectric region and other regions of the semiconductor device to exposure to environmental elements such as humidity and oxygen. The reduced likelihood of exposure to these environmental elements, due to sealing the openings, may reduce the likelihood and / or rate of formation of defects in the dielectric region and the other regions of the semiconductor device.

The present invention makes it easier to ensure that the relation between a second cladding layer and an optical waveguide material layer is as designed. This method for manufacturing an optical modulator (1) comprises a first substrate forming step and a bonding step. In the first substrate forming step, a first substrate (100) is formed. The first substrate (100) includes: a second cladding layer (7) having a planar main surface (701); and a support substrate (10). The first substrate (100) has a planar main surface (111). In the bonding step, a second substrate (200) is prepared, the second substrate (200) having a first main surface (211) and a planar second main surface (212), and in which an optical waveguide material that serves as the basis of an optical waveguide material layer (20) including an optical waveguide (2) is exposed on the second main surface (212), the main surface (111) of the first substrate (100) and the second main surface (212) of the second substrate (200) are arranged to face one another, and then the first substrate (100) and the second substrate (200) are bonded together.

This invention discloses a method and system for measuring the frequency response of an electro-optic modulator based on a spectral analyzer. The system includes a laser, a 95:5 single-mode fiber splitter, an optical power meter, an electro-optic modulator, a control power supply, an RF signal generator, and a spectral analyzer. The measurement method includes the following steps: calculating a calibration factor to correct optical power drift through optical path splitting, driving the modulator by applying several discrete single-frequency RF points, and measuring the carrier power P0(f) using the spectral analyzer. i ) and the first-order sideband power P1(f i ), and determined by the power ratio R(f) i )=10 (P1‑P0) / 10 Combining the Jacobi–Anger expansion / Bessel function relation, the phase modulation index β(f) is solved by inverse solution. i Then, the phase transfer function H(f) at each frequency point is calculated and fitted. i The continuous frequency response S of the modulator is obtained. 21 This invention simplifies the testing process, reduces reliance on high-speed photodetectors and vector network analyzers, and enables high-precision electro-optic response testing of electro-optic modulators at high frequencies.

This application provides a resonant modulator applicable to the field of optoelectronic information technology. The resonant modulator includes a substrate layer, a buried layer, a core layer, and an upper cladding layer. The core layer includes a multimode interference coupler and a connecting waveguide. The multimode interference coupler includes a multimode interference region and a main input port waveguide, a main output port waveguide, a feedback output port waveguide, and a feedback input port waveguide. The two ends of the connecting waveguide are optically connected to the feedback output port waveguide and the feedback input port waveguide, forming an optical feedback loop with the multimode interference coupler. An electro-optic modulation unit is associated with a first region of the connecting waveguide and is used to adjust the effective refractive index of the connecting waveguide by applying an electrical signal to change the resonant state of the resonant modulator. Based on the above structure, the sensitivity to coupling spacing and manufacturing errors can be reduced, and the device operating tolerance and modulation stability can be improved. This application also provides an optical computing system and a photonic integrated system.

This disclosure provides an electro-optic modulator, including a modulator body and an equalization circuit. The equalization circuit includes: a first doped semiconductor, including a first N-type doped region and a first P-type doped region, the first N-type doped region being connected to a first electrode and a signal input terminal, the first P-type doped region being connected to a second electrode and an electrode arm, the first electrode and the second electrode being used to receive a first control voltage with reverse bias; and a second doped semiconductor, including a second N-type doped region and a second P-type doped region, the first end of the second N-type doped region and the first end of the second P-type doped region being both connected to the signal input terminal, the second end of the second N-type doped region and the second end of the second P-type doped region being both connected to the electrode arm, the first end of the second P-type doped region being further connected to a third electrode, the second end of the second N-type doped region being further connected to a fourth electrode, the third electrode and the fourth electrode being used to receive a second control voltage.

The application relates to a polarization holographic multiplexing display system and method based on an acousto-optic modulator, wherein a beam splitter is arranged in front of a spatial light modulator; a laser, a first linear polarizer and the beam splitter are sequentially arranged on an optical path of the laser; a first lens, a pinhole, a second lens and a first polarization grating are sequentially arranged on a reflection optical path of the beam splitter; four circularly polarized lights are arranged behind the first polarization grating; a reflecting mirror, an acousto-optic modulator, a third lens and an image sensor are sequentially arranged on an optical path of a first light beam; a second polarization grating, a second linear polarizer and an image sensor are sequentially arranged on optical paths of a second light beam, a third light beam and a fourth light beam. The application can obtain three kinds of reconstructed images with different effects at different reconstruction distances, and has a good application prospect in the fields of holographic display, holographic storage and the like.

This application provides an electro-optic modulator chip, a packaging structure, and an electronic device, relating to the field of optical communication technology. The electro-optic modulator chip includes: a first end connected to an input light source, and a second end connected to an output light source and a monitoring end; the input light source is used to transmit an input optical signal to the electro-optic modulator; the electro-optic modulator modulates the input optical signal to obtain a modulated optical signal and a monitoring optical signal, and transmits the modulated optical signal to the output light source and the monitoring optical signal to the monitoring end; the output light source is used to output the modulated optical signal; the monitoring end is used to output the monitoring optical signal; the transmission direction of the optical signal is parallel to the plane of the substrate. The packaging structure includes: a substrate, a monitor, and the electro-optic modulator chip; the electro-optic modulator chip is fixedly mounted on the substrate; the monitor is fixedly mounted on the substrate; the monitor receives the monitoring optical signal output by the electro-optic modulator chip and performs optical power monitoring based on the monitoring optical signal to obtain the monitoring result.

This invention relates to the field of optoelectronic detection technology and discloses an online detection system for screen color uniformity based on dynamic rotating polarization spectrum. The system includes an online transmission module for carrying and driving the illuminated screen under test to move continuously along a set direction at a set speed; and a combined optical encoding module, positioned above the screen under test, comprising a static spatial-spectral phase delay mask and a continuously rotating polarization modulator arranged sequentially along the beam propagation direction. By driving the screen to continuously translate using the online transmission module, and cooperating with the continuously rotating polarization modulator and hyperspectral acquisition module to acquire dynamic spatiotemporal aliasing data, the accuracy of the spectral dimension can be guaranteed. Furthermore, by extracting high-precision chromaticity parameter matrices and multidimensional polarization distortion feature matrices from the decoupled and reconstructed optimal polarization spectral tensor solution, the system's ability to detect complex internal quality problems can be significantly enhanced.

This invention belongs to the field of laser additive manufacturing technology, specifically relating to a dual-spot parallel scanning additive manufacturing system and method. A laser generation unit dynamically distributes a laser beam to the first and second optical paths according to a preset energy ratio through polarization beam splitting. The spot generation unit uses two spatial light modulators to modulate the two beams into patterned spots and dot spots respectively. The filtering and imaging unit filters and images the two beams. The parallel scanning unit drives the dual spots to scan synchronously on a powder bed. The control unit performs model slicing and patterned region segmentation, and dynamically allocates energy and synchronously controls all units to work together based on the segmentation results. This achieves a single laser, dual optical paths, irregularly shaped spots, and parallel scanning, simultaneously balancing processing efficiency and forming accuracy, effectively solving the technical problem of traditional single-spot methods that struggle to achieve both efficiency and accuracy.

The application relates to the technical field of optical modulation, in particular to a magneto-optical modulation device, which comprises an active layer, the active layer comprising a two-dimensional Dirac material; a first dielectric layer and a first magnet, the first dielectric layer being located on a first surface, and the first magnet being located on a side of the first dielectric layer away from the active layer; a second dielectric layer and a second magnet, the second dielectric layer being located on a second surface, and the second magnet being located on a side of the second dielectric layer away from the active layer, the first magnet and the second magnet being used for forming a magnetic field, and a magnetic field direction of the magnetic field being parallel to a first direction; a first transparent electrode plate and a second transparent electrode plate, the first transparent electrode plate and the second transparent electrode plate being respectively located on a first side and a second side, and the first transparent electrode plate and the second transparent electrode plate being used for forming an electric field, and an electric field direction of the electric field being parallel to a second direction.The application is at least beneficial to improving the sensitivity and controllability of the magneto-optical modulation device to light modulation.

An optical semiconductor device includes: a substrate; an optical modulator including a semiconductor layer having a first conductivity type layer, an absorbing layer and a second conductivity type layer which are formed in this order on the substrate, a first electrode connected to the first conductivity type layer, and a second electrode connected to the second conductivity type layer; a first pad connected to the first electrode; and a second pad connected to the second electrode, wherein the semiconductor layer includes a waveguide, a first terrace and a second terrace positioned on opposite sides with respect to the waveguide, the first pad and the second pad are placed on the first terrace via an insulating film, and the first conductivity type layer is removed in the first terrace between the first pad and the second pad.

The application discloses a display assembly and a streaming media rearview mirror. The display assembly comprises an anti-glare display module, the anti-glare display module at least comprises a first polarizing layer, an anti-glare adjusting layer and a reflecting layer arranged in sequence along the thickness direction of the anti-glare display module, the anti-glare adjusting layer at least comprises two glass substrates and a liquid crystal layer encapsulated between the glass substrates; the display assembly further comprises a backlight module, the backlight module is located at one side of the anti-glare display module in the thickness direction; the streaming media rearview mirror comprises the display assembly. The scheme integrates the light modulation function of the traditional independent LC mirror and the image generation function of the liquid crystal display screen in the same anti-glare display module, can cancel the independent LC mirror module and the matched glass substrate, polaroid and other components, realizes the substantial reduction of the overall thickness and weight of the display module, and meets the needs of the automobile electronics for space saving and light weight.

The utility model relates to a kind of knob formula light modulation panel, including electricity receiving pedestal, be located on the light modulation control board of electricity receiving pedestal upper surface, be located on the gasket of light modulation control board upper surface, and be located on the key panel of gasket upper surface;The upper surface of light modulation control board is integrated with light modulation knob cylinder piece and multiple function keys, and the press part is provided on the key panel corresponding function key;Gasket and key panel are all provided with the through-hole for light modulation knob cylinder piece to pass through;The upper side of light modulation knob cylinder piece is sequentially provided with support and display panel and transparent panel upwards;Support is located at the top of light modulation knob cylinder piece and is detachably connected therewith;Display panel is electrically connected with light modulation control board;When using, the display panel in the top of light modulation knob cylinder piece can be used to display time, weather condition or indoor temperature etc. Information, more functions, higher practicality.

The present invention provides an optical modulation element exhibiting a Kerr rotation angle of 0.5° or greater, a spatial light modulator equipped with the optical modulation element, and a display device equipped with the spatial light modulator. [Solution] The optical modulation element comprises a second electrode facing the incident surface into which light is incident, a ferromagnetic ferroelectric layer disposed on the incident surface side of the second electrode, and a ferromagnetic layer disposed on the incident surface side of the ferromagnetic ferroelectric layer, wherein the thickness of the ferromagnetic ferroelectric layer is in the range of 20 to 100 nm, and the thickness of the ferromagnetic layer is in the range of 3 to 20 nm. When a voltage is applied to the ferromagnetic ferroelectric layer by the second electrode, electric polarization is induced in the ferromagnetic ferroelectric layer, and the magnetization of the ferromagnetic ferroelectric layer and the ferromagnetic layer is controlled according to this electric polarization. The spatial light modulator comprises this optical modulation element. The display device comprises this spatial light modulator.

A fiber optic collimator, an acousto-optic modulator, and a method for correcting the first-order diffraction deviator of the acousto-optic modulator are provided. The fiber optic collimator includes a first sleeve, a first collimating lens, and a first capillary. The first capillary is disposed and encapsulated within the first sleeve, and is radially offset relative to the principal optical axis of the first collimating lens, such that the light beam emitted from the first optical fiber held by the first capillary, after passing through the first collimating lens, forms a Bragg angle with the normal to the light-transmitting surface of the acousto-optic crystal of the adapted acousto-optic modulator. The acousto-optic modulator includes a housing, an inlet glass tube, an outlet glass tube, an acousto-optic crystal, an acousto-optic transducer, an inlet fiber optic collimator, and an outlet fiber optic collimator. The inlet glass tube and the outlet glass tube are located on the same axis of the housing. The inlet fiber optic collimator is the aforementioned fiber optic collimator. In the method for correcting the first-order diffraction deviator of the acousto-optic modulator, the acousto-optic modulator is the aforementioned acousto-optic modulator.

The application relates to the technical field of LED circuit, in particular to a lamp color adjusting circuit with a thyristor light modulation module, which comprises a rectifier circuit, a multi-grade dial code color adjusting circuit, a frequency flash removing circuit, a thyristor current discharge circuit and a constant current light modulation circuit. The rectifier circuit converts an alternating current power supply into a direct current voltage to supply power to a circuit system. The multi-grade dial code color adjusting circuit adjusts the current distribution of LED lamp beads through a dial code switch and a second group of resistors, generates a color adjusting signal, carries out low-pass filtering and dynamic compensation on the color adjusting signal, and outputs a pure control signal to the thyristor current discharge circuit. The thyristor current discharge circuit adjusts a current path according to the control signal to provide a smooth and adaptive power supply for the constant current light modulation circuit. The constant current light modulation circuit realizes constant current output. The design significantly reduces the hardware cost and the complexity of the circuit system, effectively suppresses electromagnetic interference in combination with the low-frequency modulation characteristics of the thyristor, and realizes the balance between light modulation precision and the stability of the circuit system.

This invention provides an improved electro-optic modulator for optical integrated circuits (PICs). [Solution] An electro-optic modulator for an optical integrated circuit includes a substrate, a first waveguide on a first portion of the substrate, a second waveguide on a second portion of the substrate, and a first electrode in contact with the first waveguide, wherein the first waveguide includes a first electrode located between the first electrode and the first portion of the substrate, and a second electrode in contact with the second waveguide, wherein the second waveguide includes a second electrode located between the second electrode and the second portion of the substrate.

The application provides a reconfigurable mask and a reconfiguration method. The reconfigurable mask comprises: a mask array comprising at least one light modulation unit; and a driving module connected to each light modulation unit, the driving module being configured to provide a driving voltage for each light modulation unit. The light modulation unit comprises: a light modulation component comprising a phase modulation layer, the phase modulation layer being configured to change the phase of incident light based on the input driving voltage; and an output, the output being configured to output the incident light with the changed phase. Based on the reconfigurable mask, the target light field pattern can be iteratively learned and optimized based on the back propagation principle of the light diffraction neural network model, and the voltage parameters of the light diffraction neural network model can be optimized and configured through the electro-optic phase modulation technology to generate the driving voltage. In this way, through a modulable mask, the target light field pattern is taken as the iterative learning target, different wafer patterns are realized, the reconfigurable mask is multiplexed, and the manufacturing cost is saved.

The invention relates to the field of tungsten-based alloy target material preparation, in particular to a tungsten-based multi-component alloy target material containing a W3Ni17 specific phase and a preparation method, the target material contains the W3Ni17 specific phase and auxiliary phases such as a W phase and Ni3Ta phase, W powder and Ni powder serve as basic powder, and Cr / Ta / Si powder serves as optional auxiliary powder; the preparation method comprises the steps of multi-step segmented argon protection mixing according to a specific phase atomic ratio, alloying purification, cold isostatic pressing multi-section pressure relief forming, multi-section heating hydrogen protection sintering and the like. According to the design, the problems that a conventional target material cannot form a specific functional phase, elements are segregated, the density is insufficient, and light modulation efficiency and cycling stability are difficult to consider are solved, the density of the prepared target material is larger than or equal to 96%, the average crystal grain is smaller than or equal to 50 micrometers, the W3Ni17 phase accounts for 40%-85%, and the target material is suitable for preparation of a large-area electrochromic film and meets the requirements of the fields of energy-saving buildings, automobiles and the like.

This utility model discloses an electro-optic modulator and an optical communication system. The electro-optic modulator includes: a housing, a cover plate, a modulator chip, an optical input port, an optical output port, an RF signal input, and an internal component. The housing has a cavity and an opening, and the cover plate is used to seal the opening. The modulator chip is disposed within the cavity. The optical input port and the optical output port are both connected to the modulator chip. The RF signal input is connected to the modulator chip. The internal component is disposed within the cavity and connected to the housing. The modulator chip is disposed between the housing and the internal component. By placing the internal component within the cavity of the electro-optic modulator housing and placing the modulator chip between the housing and the internal component, the space around the modulator chip can be significantly reduced, signal resonance can be reduced, return loss can be lowered, and the bandwidth of the electro-optic modulator can be increased.

An electro-optic modulator includes a glass layer, which may include a conductive layer. A first homeotropic alignment layer is disposed on the glass layer. A liquid crystal layer is disposed on the first homeotropic alignment layer opposite the glass layer. A second homeotropic alignment layer is disposed on the liquid crystal layer opposite the first homeotropic alignment layer. A reflective mirror is disposed on the second homeotropic alignment layer opposite the liquid crystal layer. The liquid crystal layer includes a negative dielectric liquid crystal.

This application provides a method, system, electronic device, and storage medium for determining silicon photonics bias voltage, relating to the field of optical communication technology. The method includes: acquiring at least four pre-set sampling voltages and sequentially applying each sampling voltage to the heating element of a silicon photonics modulator; acquiring the output power of the silicon photonics modulator under each sampling voltage; fitting and generating a response curve between voltage and output power based on the multiple sampling voltages and the corresponding output power; determining a target voltage corresponding to a preset operating state based on the response curve between voltage and output power, and using the target voltage as the operating bias voltage of the silicon photonics modulator under the preset operating state, achieving high-precision, adaptive bias voltage tracking, greatly improving the production efficiency of optical modules, and being simple and reliable.

The application relates to the field of optical communication, in particular to a duplex bidirectional optical assembly. The duplex bidirectional optical assembly is characterized in that a lens and a filter optically coupled with the lens are arranged in an optical path conversion module, a first BOSA, a second BOSA and a fiber connector are cooperated, wavelength selection characteristics of the filter and light collimation and focusing functions of the lens are used, single-fiber bidirectional communication and multi-wavelength signal multiplexing are realized, the number of fibers and BOSAs is reduced, and the internal structure of an optical modem is simplified; meanwhile, the combination of the lens and the filter can be flexibly adapted to different network requirements, network upgrading can be supported without replacing equipment, and the problems of complex structure and difficult upgrading of a traditional optical modem are effectively solved.

This invention relates to the field of combustion diagnostic technology, specifically to a combustion diagnostic method and system based on a vector light field. The system includes a spectrometer and, sequentially arranged components: a femtosecond laser, a beam-expanding lens group, a spatial light modulator, a first lens, a filter, a quarter-wave plate, a second lens, a Rochi grating, a third lens, and an imaging unit. The spatial light modulator, first lens, second lens, and Rochi grating form a 4f optical system. The spatial light modulator is used to load a holographic grating to phase-modulate the expanded femtosecond laser beam, thereby forming a vector light field. The filter is used to filter out the ±1st order diffraction light of the femtosecond laser modulated by the spatial light modulator. The imaging unit is used to acquire images of the optical filament, and the spectrometer is used to acquire the spectral signal of the interaction between the optical filament and the combustible material, thereby achieving combustion diagnosis. This invention forms the optical filament based on a vector light field, improving the stability of the optical filament and providing a foundation for improving the accuracy of combustion diagnosis.

This application discloses a spatial light modulator, driving method, free-space optical antenna, device, and system, relating to the field of free-space optical communication technology. The spatial light modulator includes a first substrate, a first electrode, a liquid crystal layer, a second electrode, and a second substrate. The first electrode is a planar electrode, and the second electrode includes multiple sub-electrodes spaced apart from each other. The multiple sub-electrodes are arranged sequentially from the inside to the outside around a center. When different driving voltages are applied to the first electrode and the sub-electrodes respectively, the liquid crystal material in the liquid crystal layer flips under the action of the electric field, resulting in different equivalent dielectric constants of the liquid crystal material. This allows the spatial light modulator to adjust the intensity and phase of the incident light beam to modulate different types of light beams, achieving adaptive switching of light beam types. In particular, it can achieve adaptive switching of different types of light beams in a sharp beam, improving anti-turbulence capability and enhancing the stability of the communication link.

This disclosure provides an apparatus for modulating light, the apparatus comprising a substrate having a plurality of electrical interconnects disposed on its top surface and an array of optical modulation elements disposed on the substrate. The optical modulation elements of the apparatus include an array of optical modulation elements, the array including a bottom electrode disposed on the substrate, wherein the bottom electrode is coupled to an electrical interconnect among the plurality of electrical interconnects, a bottom surface of a first dielectric layer is located above the bottom electrode, and a quantum well layer covering the top surface of the first dielectric layer. A second dielectric layer is then configured to cover the top surface of the quantum well layer, wherein each optical modulation element of the optical modulation element array is spatially separated from each of the other optical modulation elements of the array, and the top electrode is located on top of the optical modulation element array.

In one embodiment, the invention provides a memory cell having a first and second optical modulator. Each optical modulator has a light input and at least one light output and receives an electrical input determining a switching state of the optical modulator defining a switching of light between the light input and light output. A first photodiode is connected to conduct current to a first node when illuminated, and a second photosensor is connected to conduct current away from the first node when illuminated. Similarly, a third photosensor is connected to conduct current to a second node when illuminated, and a fourth photosensor is connected to conduct current away from the second node when illuminated. The first and second optical modulators control light directed to at least one of a respective photosensor and have their electrical inputs connected to one of the first and second nodes to provide bistable switching states.

A laser processing apparatus includes: a stage that supports a wafer having a surface and a back surface opposite the surface, the surface having a plurality of functional elements formed thereon and a scribe lane region extending between adjacent functional elements; a light source that forms one or more modified regions in the wafer by irradiating the wafer with laser light from the surface side; a spatial light modulator that adjusts a beam width of the laser light as a beam width adjustment section; and a control section that controls the spatial light modulator in a manner that adjusts the beam width of the laser light to be below a target beam width corresponding to surface information including a width of the scribe lane region and a position and height of a structure constituting a functional element adjacent to the scribe lane region.