137 results about "Electro-optic effect" patented technology

The invention discloses an optical memristor, and relates to the field of photon integrated circuits and optical computing, and the optical memristor comprises a waveguide layer, a ferroelectric film layer, an electrode structure and a substrate. The ferroelectric film layer is located on the upper surface of the substrate; the waveguide layer and the electrode structure are located on the upper surface of the ferroelectric film layer; the waveguide layer is used for propagating an incident light signal and performing amplitude modulation on the incident light signal; the electrode structure is used for applying an electric field to the ferroelectric film layer; and the ferroelectric film layer is used for carrying out phase modulation on optical signals transmitted in the waveguide layer under the action of the electric field. The ferroelectric material is used as the optical switch of the optical memristor, efficient modulation of the optical phase is achieved through the non-volatility and the high electro-optical effect of the ferroelectric material, and meanwhile the optical memristor has the advantages of being low in energy consumption and rapid in response.

An optical device includes a silicon substrate, a waveguide formed of a thin film that is laminated on the silicon substrate and that is made of a perovskite oxide with a large electro-optic effect as compared to lithium niobate, and a cladding layer that covers the waveguide. Further, the optical device includes ground electrode that has a ground potential and a signal electrode that is arranged at a position facing the ground electrode and that applies driving voltage to the waveguide.

The present invention addresses the problem of providing: a composition and a polymer compound which are each capable of suppressing aggregation of a dye that has a nonlinear optical effect in a nonlinear optical material, and exhibiting a higher electro-optic effect with respect to the absorbance after poling; a nonlinear optical element which is obtained using the composition; and an optical modulator which comprises the nonlinear optical element and operates on the basis of an electro-optic effect. The present invention pertains to a composition which contains a compound represented by formula (1) and a compound represented by formula (3), wherein the content of the compound represented by formula (3) is 0.0001 mol% to 25 mol% inclusive relative to the total content of the compound represented by formula (1) and the compound represented by formula (3).　(Definitions of groups are as set forth in the description.)

The invention belongs to the field of insulator detection, and particularly relates to a porcelain insulator degradation detection method based on a photoelectric field sensing technology, which comprises the following steps: carrying out analogue simulation on a 35kV-500kV line porcelain insulator string through COMSOL, and establishing models by analogue simulation including a non-degradation model and a degradation model; the live detection of the porcelain insulator string is realized, firstly, the porcelain insulator string is simulated under two conditions of non-degradation and degradation, field intensity change reference thresholds of a high section, a middle section and a low section of the porcelain insulator string are confirmed, and during detection, a broadband electric field sensor based on a Pockels electro-optical effect is used for detecting the field intensity change reference thresholds of the high section, the middle section and the low section of the porcelain insulator string. Each insulator, between the high-voltage end and the low-voltage end, of the to-be-detected porcelain insulator string in the axial direction is detected, the detected field intensity data generates an axial field intensity distribution curve through the pre-simulated reference curvature, the fault position is visually displayed and the fault piece is confirmed in a curve comparison mode, and the detection accuracy is improved in a segmented comparison mode.

An optical device is described. The optical device includes a waveguide, a first engineered electrode, and a second engineered electrode. The waveguide includes at optical material(s) having an electro-optic effect. The optical material(s) include lithium. A portion of the waveguide has a waveguide width. The first engineered electrode includes a first channel region and first extensions protruding from the first channel region. The first extensions are closer to the portion of the waveguide than the first channel region is. The second engineered electrode includes a second channel region and second extensions protruding from the second channel region. The second extensions are closer to the portion of the waveguide than the second channel region is. A first extension of the first extensions is a distance from a second extension of the second \extensions. The distance is less than the waveguide width.

Provided is an optical control element capable of arranging an input portion and an output portion of an optical waveguide on the same side of a substrate in which the optical waveguide is formed, and capable of reducing differences in the configuration of each branch waveguide while minimizing optical path differences between branch waveguides. The optical control element has a substrate (1) having an electro-optic effect, an optical waveguide (2) formed in the substrate, and a control electrode that controls an optical wave propagating in the optical waveguide, characterized in that an input portion (incident light (L1)) and an output portion (emitted light (L2)) of the optical waveguide are formed on the same side of the substrate, the optical waveguide has at least one Mach-Zehnder type optical waveguide portion (MZ) having two branch waveguides (21, 22) branched from one optical waveguide and recombining the two branch waveguides to form one optical waveguide, and the branch waveguides have an even number of return portions (A1, A2).

The invention discloses a non-Hermite singular point photon gyroscope based on a lithium niobate single crystal film. Comprising a wide-spectrum light source, a spot size converter, a polarizer, a gyroscope sensing unit, a photoelectric detector and a lithium niobate film layer which are positioned in a packaging shell, the wide-spectrum light source, the spot size converter, the polarizer, the gyroscope sensing unit and the photoelectric detector are all located on the upper surface of the lithium niobate thin film layer and are sequentially arranged in the light path direction; light emitted by the wide-spectrum light source sequentially passes through the spot size converter, the polarizer and the gyroscope sensing unit and then is received by the photoelectric detector. By means of the electro-optical effect of lithium niobate, the resonant frequency of the micro-cavity is adjusted by applying voltage to keep the gyroscope sensing unit at a singular point in the initial state, and interference of external factors is counteracted; the anti-space-time inversion symmetric structure is constructed, the sensitivity of the gyroscope sensing unit is improved by utilizing the sensitivity of singular points to external perturbation, and the gyroscope sensing unit has the advantages of high sensitivity, small size, high practicability and integratability.

The invention relates to the technical field of optical sensing, in particular to a metasurface waveguide array based on a silicon carbide substrate and a spectrum sensing system. The system comprises a coupling modulation module, a waveguide transmission module and a spectral analysis module, the coupling modulation module realizes multi-physical field coupling modulation through a nonlinear coupling superposition principle of a thermo-optical effect and an electro-optical effect; the waveguide transmission module selectively activates waveguide channel combination based on a neural network prediction model and dynamically optimizes transmission parameters through an online reinforcement learning algorithm; the spectral analysis module performs environment compensation correction on the spectral characteristic parameters and outputs a corrected recognition result; according to the invention, multi-physics field coupling modulation, intelligent waveguide channel selection and environment adaptive compensation technologies are innovatively combined, the problems of insufficient precision and poor adaptability of a traditional spectrum sensing system in a complex environment are solved, and high-precision and adaptive spectrum sensing is realized.

An electro-optic device is described. The electro-optic device includes at least one optical material having an electro-optic effect. Further, the optical material(s) include lithium. The optical material(s) have a slab and a ridge waveguide. The slab has a top surface. The slab includes free surfaces. Each of the free surfaces is at a nonzero angle from the top surface of the slab and mitigates stress in the slab.

An optical integrated device includes a first chip including an optical circuit, and a second chip including an optical waveguide including a material with an electro-optic effect larger than the electro-optic effect of a material of the first chip. In the optical integrated device, the first chip is mounted in a trench formed on the second chip, and the first chip is optically coupled to the second chip by butt coupling.

An electro-optic device is described. The electro-optic device includes at least one optical material having an electro-optic effect. Further, the optical material(s) include lithium. The optical material(s) have a slab and a ridge waveguide. The slab has a top surface. The slab includes free surfaces. Each of the free surfaces is at a nonzero angle from the top surface of the slab and mitigates stress in the slab.

An optical waveguide component, a preparation method therefor, and an electro-optic modulator are disclosed. The optical waveguide component includes an insulating substrate, a waveguide core, at least two electrodes, and a cladding layer. The at least two electrodes and the waveguide core are all disposed on the insulating substrate, the at least two electrodes are distributed on two sides of the waveguide core, and the cladding layer covers at least a part of an outer wall of the waveguide core. The waveguide core includes an electro-optic material having an electro-optic effect. A refractive index of the insulating substrate is less than a refractive index of the waveguide core. A refractive index of the cladding layer is greater than the refractive index of the waveguide core.

The invention discloses a photonic crystal surface emitting laser based on electro-optical effect modulation and an emission angle and wavelength regulation and control method thereof, and belongs to the field of laser devices. The photonic crystal surface emitting laser comprises a substrate layer, an isolation layer and an active LiNbO3 layer; the isolation layer is a SiO2 isolation layer or an air isolation layer, and the air isolation layer is formed by etching the SiO2 isolation layer through a SiO2 etching agent; the active LiNbO3 layer is made of erbium-doped LiNbO3 or ytterbium-doped LiNbO3, and periodic holes are etched in the surface of the active LiNbO3 layer to form the photonic crystal layer. The photonic crystal surface emitting laser is prepared by using the active electro-optical effect material, the electro-optical effect material is combined with the photonic crystal surface emitting laser, and the emission angle and the emission wavelength are regulated and controlled through the electro-optical effect of LiNbO3 and the diffraction effect of the photonic crystal.

SOLUTION: To provide an optical device with a waveguide and an electrode, the waveguide including at least one optical material with an electrooptic effect and the electrode having a channel region and an extension part protruding from the channel region, the extension part being closer to a part of the waveguide than the channel region.SELECTED DRAWING: Figure 1B

Disclosed is a system and method for solid-state 2D optical phased arrays (OPAs), which are fabricated from InGaN / AlGaN multiple quantum wells (MQWs) and AlyGa1-yN / AlxGa1-xN (y<x) MQWs. The InGaN / AlGaN MQWs and AlyGa1-yN / AlxGa1-xN (y<x) MQWs include alternating p-type and n-type layers to form p-n-p-n MQW structures to allow the OPA to operate in the reversed biased configuration to further minimize the operating current and heat generation. The phase in each pixel within the OPA will be controlled independently via electro-optic effect in III-nitride MQWs by varying the voltage in each pixel by a Si CMOS array to achieve the manipulation of the distribution of optical power in the far field and steering of the main laser beam. The present disclosure is applicable to a wide range of applications, including the operation of LIDAR systems, laser weapons, laser illuminators, and laser imaging systems.

The invention discloses a magneto-optical effect-based dynamic zooming method and an optical system, and the method comprises the steps: arranging at least one magneto-optical crystal between a pre-amplifier and a main amplifier, so as to achieve the dynamic zooming through the magneto-optical effect; wherein the magneto-optical crystal is obtained by combining anisotropic materials with matched refractive indexes, and the anisotropic materials are processed into complementary parabola shapes. According to the invention, the magneto-optic effect is utilized to realize dynamic zooming, and the mode of complementary combination of the crystals with matched refractive indexes is utilized to solve the problem that the additional wavefront shape does not conform to the demand. Compared with an electro-optical effect scheme, an applied magnetic field is a uniform magnetic field along a transmission direction, so that a depolarization problem caused by a transverse component is avoided; compared with the scheme of aperture division, grating division and the like, the dynamic zooming can be realized on the premise of not influencing the output capability of the laser.

The invention provides a method for manufacturing an optical waveguide element. A method for manufacturing an optical waveguide element includes: preparing a structure including a substrate and a ridge-shaped optical waveguide layer that is provided on the substrate and is composed of a crystal material having an electro-optical effect; forming a cladding entirety covering the optical waveguide layer by using a formed film; and performing a heat treatment on the structure after the formation of the cladding layer.

A substrate configured for an electro-optic device and an electro-optic device formed using the substrate are described. The substrate includes a semiconductor substrate, an insulating layer, and at least one thin film optical material. The semiconductor substrate includes a trap-rich layer and an underlying substrate layer. The insulating layer is on the semiconductor substrate, The trap-rich layer is between the underlying substrate layer and the insulating layer. The thin film optical material(s) have an electro-optic effect and are on the insulating layer.

The invention discloses a singular point optical temperature sensor based on beat frequency detection. Comprising a wide-spectrum light source, a coupling lens group, a spot size converter, a temperature sensing unit, a photoelectric detector and a lithium niobate film layer which are located in a packaging shell. The broadband light source, the coupling lens group, the spot size converter, the temperature sensing unit and the photoelectric detector are all located on the upper surface of the lithium niobate thin film layer and are sequentially arranged in the light path direction. Light emitted by the wide-spectrum light source sequentially passes through the coupling lens group, the spot size converter and the temperature sensing unit and then is detected and received by the photoelectric detector. The electro-optical effect of lithium niobate is utilized, the resonant frequency of the microcavity is adjusted by applying voltage, the temperature sensing unit is kept at a singular point in an initial state, and the influence of interference of external factors on the sensor is restrained; the anti-space-time inversion symmetric structure is constructed, the sensitivity of the temperature sensor is improved by using the sensitivity of singular points to external perturbation, and the temperature sensor has the advantages of high sensitivity, small size and integratability.

The invention belongs to the technical field of laser devices, and relates to a bicrystal transverse electro-optical Q-switch which comprises two electro-optical crystals, electrodes, wires and a shell wrapping the electro-optical crystals. The electro-optical crystal is a potassium boron niobate crystal, the chemical formula of the electro-optical crystal is K3Nb3B2O12, the electro-optical crystal comprises a first electro-optical crystal and a second electro-optical crystal, the electro-optical crystal adopts a transverse electro-optical effect, and the first electro-optical crystal and the second electro-optical crystal have the same geometrical shape; the main axes of the first electro-optical crystal and the second electro-optical crystal mutually rotate by 90 degrees around the light passing direction. The electro-optical Q-switch is low in driving voltage, the driving voltage is reduced by 28%-95.6% compared with an existing commercialized electro-optical Q-switch under the condition that the crystal size is kept the same, and the important requirement of low-voltage driving electro-optical devices is met. The electro-optical Q-switch is simple in design, does not use a quarter-wave plate, is beneficial to miniaturized production, and has the advantages of being easy to industrialize and the like.

The application discloses a thin-film lithium niobate-based electro-optic polarization modulator, characterized by comprising a first single-mode optical fiber, an input optical coupler, an electro-optic modulation phase shift region, an output double-waveguide vertical direct receiving coupler and a second single-mode optical fiber connected in sequence, wherein the modulated light enters from the first single-mode optical fiber, is coupled into the electro-optic modulation phase shift region through the input optical coupler, is coupled into the second single-mode optical fiber through the output double-waveguide vertical direct receiving coupler after being modulated in the electro-optic modulation phase shift region, and exits from the second single-mode optical fiber. The application is based on X-cut or Y-cut thin-film lithium niobate, the electric field of the electro-optic modulation region is along the Z-axis direction, the excellent electro-optic effect of lithium niobate material is effectively utilized, the electro-optic polarization modulator has the advantages of fast response speed, low driving voltage and low power consumption. Compared with the polarization multiplexing device with a length of hundreds of microns, the compactness of the structure is greatly improved, and the miniaturization of the device is facilitated.

An optical modulator (10) is provided with an optical waveguide (1) containing a material having an electro-optical effect, a first electrode (2), and a second electrode (3). The first electrode (2) contains a semiconductor material. The second electrode (3) contains a metal material and is disposed so as to form a potential difference with the first electrode (2) and apply an electric field to the optical waveguide (1).

The invention discloses a self-adaptive strong electromagnetic signal attenuation adjusting device and method, and the device comprises a rectangular waveguide (1), a coaxial structure (2) is connected into an opening at a quarter wavelength position away from the tail end of the rectangular waveguide (1) to form a wave-same conversion interface, the tail end of the rectangular waveguide (1) is filled with an electro-optical effect dielectric material (3), and the electro-optical effect dielectric material (3) is sealed by metal; the adjustment method comprises the following steps: step 1, designing a self-adaptive strong electromagnetic signal attenuation adjustment device with an electro-optical effect dielectric material for a specific frequency range; 2, self-adaptive attenuation of the strong electromagnetic signal is realized; the problem that when a traditional fixed-value attenuator receives a strong electromagnetic signal, a plurality of attenuators are needed to enable a signal to be detected to adapt to the input level of a rear-end detector is solved. Along with the use of strong electromagnetic equipment, the attenuation method is difficult to meet the increasing rapid detection requirement, and the like.

The invention relates to an optical integrated device, an optical transmission device and an optical transceiver. There is provided an optical integrated device including: a first chip including an optical circuit; and a second chip comprising an optical waveguide comprising a material having an electro-optical effect greater than that of the material of the first chip. In an optical integrated device, a first chip is mounted in a trench formed on a second chip, and the first chip is optically coupled to the second chip by docking coupling.

To provide an optical device and the like, composed of a first chip including a first electrode and a second chip including a second electrode.SOLUTION: An optical device comprises a first chip including a first waveguide and a first electrode, and a second chip mounted on the first chip and including a second waveguide and a second electrode. The second waveguide has an electro-optic effect higher than that of the first waveguide and has a return structure that places an end of the second waveguide at an end surface of the second chip. The second waveguide is optically coupled to the first waveguide at the end surface. The second electrode has a return structure that places an end of the second electrode at the end surface, and the second electrode and the first electrode are electrically connected to each other in an area where the end has been placed.SELECTED DRAWING: Figure 1

There is provided a composite substrate in which peeling is significantly suppressed, light propagation loss is small when used as an electro-optical element, and high-speed and low-voltage drive is possible, and which can achieve an extremely thin electro-optical element capable of maintaining excellent reliability even under a severe high-temperature environment. A composite substrate for an electro-optical element according to an embodiment of the present invention includes: an electro-optical crystal substrate having an electro-optical effect; a first high dielectric layer; a second high dielectric layer; and a support substrate in the stated order. The first high dielectric layer and the second high dielectric layer are directly joined to each other, and an amorphous layer is formed at a joining interface between the first high dielectric layer and the second high dielectric layer.

The present application discloses a photonic integrated circuit, control method, device and medium, which are related to the field of optics. By controlling the electro-optic effect of the lithium niobate layer and the oscillation signal of the microwave oscillator through an external electrical signal, any effective refractive index distribution can be achieved in theory, realizing the programmable control of the metastructure waveguide, and promoting the reusability and sustainable use of the device; it has the ability to reset functions, and can switch in real time according to the written external voltage program, realizing true artificial intelligence; multiple functions can be achieved through a single structure, reducing production costs and technical barriers, and providing a way of scalability, with strong application potential; compared with thermo-optical and acousto-optic modulation technologies, the electro-optical control and microwave control provided by the present application have fast modulation speed, low cost and high repeatability; compared with two-dimensional materials and nonlinear modulation technologies, the electro-optical control and microwave control provided by the present application have stable working conditions and are easy to process.

In order to provide an optical waveguide element that is capable of reducing coupling loss at a coupling portion with an optical fiber and of reducing propagation loss in an optical waveguide, the optical waveguide element comprises a supporting substrate and a waveguide layer consisting of a material having an electro-optic effect stacked on the supporting substrate, wherein a rib portion for forming an optical waveguide is provided protruding on an upper surface of the waveguide layer; a groove portion is formed on an upper surface of the supporting substrate directly below a part of the rib portion; and the groove portion is filled with a material having an effective refractive index comparable to that of the waveguide layer.

The application provides a thin-film lithium niobate-based optical frequency comb generation device and method, and belongs to the technical field of optical frequency combs, and comprises a pumping unit for providing single / multi-frequency laser; a microwave modulation unit for performing electro-optic modulation on a normal dispersion double-micro-ring resonant cavity unit to generate modulation sidebands; and the normal dispersion double-micro-ring resonant cavity unit generates an optical frequency comb through normal dispersion, electro-optic effect and third-order nonlinear effect. The single / multi-frequency laser is coupled to the normal dispersion double-micro-ring resonant cavity unit based on thin-film lithium niobate, and the normal dispersion, electro-optic effect and third-order nonlinear effect are combined to realize optical frequency comb spectrum widening and spectrum envelope flattening.

The invention provides an electro-optical effect voltage sensor temperature compensation method and device, and belongs to the field of electro-optical effect voltage sensors. The method comprises the following steps: acquiring a working environment and operation time of a target electro-optical effect voltage sensor; according to the operation time and a preset temperature prediction model, obtaining an initial prediction temperature of the target electro-optical effect voltage sensor in the prediction time period; the initial prediction temperature is corrected according to the working environment, and the prediction temperature of the target electro-optical effect voltage sensor in the prediction time period is obtained; and performing temperature compensation on the measurement voltage of the target electro-optical effect voltage sensor according to the predicted temperature and a preset temperature compensation model to obtain the temperature compensation voltage of the target electro-optical effect voltage sensor. According to the invention, temperature compensation can be carried out on the electro-optical effect voltage sensor without a temperature sensor, so that the target electro-optical effect voltage sensor can be better suitable for a high-voltage measurement scene.