70 results about "Optical medium" patented technology

The invention relates to the technical field of free space optical communication, and discloses a wireless optical communication device which comprises a transmitting end and a receiving end. The transmitting end comprises an information source generation unit, a coding unit, a modulation unit, a driving unit, a light source unit and a transmitting optical assembly; the receiving end comprises a receiving optical assembly, a CCD camera, a signal processing unit, a demodulation unit and a decoding unit; in actual use, wireless communication is carried out through the optical medium, the communication medium is safe, and the problems of active electromagnetic silence and passive electromagnetic suppression do not need to be worried about; the coverage range of visible light is wide, the communication range is wide, and deployment is convenient; in addition, communication is carried out through the CCD camera, so that the original CCD camera can be replaced in some scenes where the CCD camera is installed, and image shooting and wireless optical communication can be realized at the same time.

The application relates to the technical field of adaptive optics and intelligent material application, and discloses a liquid lens continuous zooming method and system based on programmable control, which comprises the following steps: temperature adjustment is performed on a phase change container to switch the phase change container from a glass state to a high-elasticity state; the volume of an optical medium is adjusted to drive the phase change container in the high-elasticity state to deform until the phase change container reaches a target optical appearance; temperature adjustment is performed on the phase change container to switch the phase change container from the high-elasticity state back to the glass state to lock the target optical appearance, and passive self-locking of the focal length is realized. Through the combination of the glass transition characteristics of the shape memory polymer and the precise regulation and control of the volume of the optical medium, the continuous zooming and passive self-locking of the liquid lens are realized, the problem that the traditional liquid lens needs to continuously consume electric energy to maintain the focal length is effectively solved, and the optical appearance precision and long-term stability of the lens in a complex environment are ensured.

The application discloses a transparent controlled zoom optical system with ciliary muscle induced regulation function, which is transparent and arranged on the light path between a human eye and an observation target object; the system comprises a control module for driving continuous longitudinal displacement of an optical focus; the system can be controlled to generate smooth and continuous change of diopter, so that the virtual image focus is generated to make smooth and continuous reciprocating displacement along the optical axis direction. The application does not rely on digital space modeling, directly generates continuous and smooth focus displacement on the longitudinal optical axis through controlled change of physical parameters of an optical medium, utilizes the passive and natural following characteristics of the human eye to the focus, stretches the ciliary muscle, intervenes in pseudo myopia and relieves visual fatigue.

A biological component measuring device (1) includes an optical medium (10), a high-thermal-conductivity film (30), an excitation light source (16), a probe light source (20), and a light position detector (25). The high-thermal-conductivity film (30) has a higher thermal conductivity than the optical medium (10) and is disposed on a sample placement surface (second surface (12)) of the optical medium (10). The high-thermal-conductivity film (30) diffuses heat generated from a sample (5) irradiated with excitation light (17) more in a first direction (x direction) than in a second direction (y direction). The first direction is a direction of travel of probe light (21) in a plan view of the sample placement surface. The second direction is a direction perpendicular to the first direction in the plan view of the sample placement surface.

Electro-optical arrangement, comprising: a first substrate with a first surface and a second surface opposite or opposite to the first surface, which is conductive from the first surface to the second surface; a second substrate with a third surface and a fourth surface opposite or opposite to the third surface, wherein the second and third surfaces face each other to define a gap; a first electrode that is coupled to the second surface; a second electrode coupled to the third surface; and an electro-optical medium arranged between the first electrode and the second electrode.

This invention discloses a laser post-processing device and method for large-aperture optical dielectric thin film nodule defects, relating to the field of laser technology. The laser post-processing device for large-aperture optical dielectric thin film nodule defects includes: an ultraviolet pumped laser, a focusing lens, a femtosecond laser, a scanning galvanometer, a scanning field mirror, a centrally located aperture mirror, an observation camera, an electrically driven displacement platform, and a control computer. The laser post-processing device and method for large-aperture optical dielectric thin film nodule defects provided by this invention utilize the characteristics of small focal spot and small heat-affected zone of femtosecond lasers, and with the assistance of an optical camera, accurately remove nodule defects in localized areas in real time. Furthermore, it can automatically identify and accurately locate nodule defects, achieving rapid removal of nodule defects and reducing the impact of the post-processing process on the surrounding normal film layer. Simultaneously, it reduces manual intervention, improves the degree of automation, and effectively improves the post-processing efficiency of optical dielectric thin film nodule defects.

To achieve probabilistic constellation shaping in a transceiver.SOLUTION: An optical communication device 100 employing a probabilistic constellation shaping circuit (PCS) 116 includes a processing circuit 104 coupled to an optical transceiver 108. With respect to the transmission function, the processing circuitry 104 generates one or more drive signals that control the optical transceiver 108 to map transmission information bits to be transmitted into transmission symbols and to generate optical transmission symbols for transmission over one or more suitable optical communication media, such as one or more optical cables, free space, etc. For the receive function, the optical transceiver receives optical transmission symbols via one or more optical media and generates received electrical signals corresponding to the received optical transmission symbols, and the processing circuitry extracts received information bits encoded in the received electrical signals.SELECTED DRAWING: Figure 1

The invention relates to a fluorescence microscopy system comprising a nonlinear optical medium (ML) and comprising: - a laser source (SL) suitable for delivering first laser pulses (IL1) having a first wavelength λ1; - a power optical modulator (MP) suitable for modulating a power of the first laser pulses (IL1) so as to form second laser pulses (IL2) having different optical powers; - said optical medium (MO) being suitable for the second pulses to propagate by undergoing self-focusing within the optical medium so as to define, for each second pulse, a focal point having a longitudinal position in the optical medium that is different from the other second pulses, laser radiation originating from the optical medium and having the second self-focused pulses, referred to as third pulses, being named the output beam (FS); - a microscope (M) suitable for: - collecting a first fluorescence radiation generated via the first wavelength λ1, by illuminating a sample (Ech) with the output beam; then - acquiring, from the first collected fluorescence radiation, at least one image of the sample for each of the third pulses illuminating the sample, each at least one image being associated with a transverse observation plane of the sample that is different from the other images.

A first circuit sends electrical data. The electrical data is sent to a vertical-cavity surface-emitting laser (VCSEL). A wavelength of the VCSEL is modulated. The modulating includes emitting, by the VCSEL, a wavelength-modulated beam (WMB). The WMB is based on the electrical data that was sent. The modulating can be based on injecting current into the VCSEL. The modulating can be based on VCSEL chirp. The WMB is coupled optically to an optical medium. The optical medium comprises a waveguide or a fiberoptic cable. The coupling optically is accomplished using a grating coupler, a mirror, or an off-axis diffractive lens. The optical medium is further coupled to a wavelength-dependent optical element (WDOE). The WDOE decodes the WMB into the electrical data that was sent. The electrical data is delivered to a second circuit.

The application relates to an integrated photonic device of III-V semiconductor on insulator and a preparation method thereof, and belongs to the technical field of semiconductors. The preparation method of the integrated photonic device of III-V semiconductor on insulator comprises the following steps: growing an epitaxial layer based on III-V semiconductor material on a first wafer, performing pattern treatment on the epitaxial layer to form a micro-nano pattern, so as to obtain a patterned optical waveguide device layer; depositing a first optical medium layer on the optical waveguide device layer as a cladding layer of the waveguide device; and bonding the first optical medium layer with a second wafer to form a heterogeneous integrated wafer. The epitaxial layer of III-V semiconductor material grown in advance is subjected to pattern treatment to form an optical waveguide device layer, and then bonding treatment is performed, so that the subsequent bonding operation can avoid affecting the pattern treatment of the epitaxial layer, and thus the yield of the optical waveguide device on the heterogeneous integrated wafer can be improved, and the integration degree of the optical waveguide device on the heterogeneous integrated wafer can be improved.

The invention relates to a method for detecting a cataract in the eye of a driver in a vehicle (1). According to the invention, the degree of a cataract is passively determined in the vehicle (1) based on a projected and reflected display content of a head-up display unit (2) and signals from a driver observation camera (3) relating to at least one eye of the driver, with respect to an idealized transmission curve of the optical media.

This application discloses a display module, comprising: a display device including multiple sub-pixels and a semi-transparent, semi-reflective layer; a dimming component disposed on one side of the light-emitting surface of the display device, including a magneto-optical modulation layer and a polarizer disposed on the side of the magneto-optical modulation layer away from the display device; the magneto-optical modulation layer includes a stacked magnetic field shielding layer, a magnetizing element, and a magneto-optical medium layer, the magnetic field shielding layer being located on the side of the magnetizing element closer to the display device; the polarizer is used to modulate incident ambient light into first linearly polarized light; the magneto-optical medium layer is used to modulate the first linearly polarized light into second linearly polarized light under the drive of the magnetizing element; the semi-transparent, semi-reflective layer is used to reflect the second linearly polarized light to the magneto-optical medium layer; the magneto-optical medium layer is used to modulate the second linearly polarized light into third linearly polarized light, the third polarization angle of the third linearly polarized light being perpendicular to the first polarization angle of the first linearly polarized light. Through the above configuration, interference from ambient light is isolated, contrast is improved, and the light transmittance of the sub-pixels is guaranteed.

Disclosed techniques for improved data transmission are disclosed. A plurality of optical links is bundled. Each optical link in the plurality of optical links includes an optical modulator, an optical coupler, and an optical medium. The plurality of optical links includes at least one spare optical link. The bundling results in a bundle of optical links. At least two bundles of optical links are grouped. The grouping results in a hierarchical grouping of optical links. One or more optical links within the group are tested. The testing includes identifying a failing optical link within the optical links that were tested. A controller replaces the failing optical link with a spare optical link. The spare optical link is within any bundle within the group. Data is transmitted from a source to the spare optical link. The transmitting includes forwarding the data from the spare optical link to a destination.

The application discloses a wavelength widely adjustable optical band-stop filter, comprising an optical transparent medium grating, a two-dimensional material layer, an optical medium layer and a metal film substrate, characterized in that the optical transparent medium grating and the two-dimensional material layer are arranged at the top of the structure, the two-dimensional material layer is laid on the top of the optical transparent medium grating or the optical medium layer, and the metal film substrate is bonded to the bottom surface of the optical medium layer. The two-dimensional material light absorption structure is designed into a single port by the metal film substrate to block the transmitted light, so that the structure realizes perfect absorption under the condition of meeting the critical coupling. The application can widely adjust the working wavelength by changing the angle of the incident light, and keep the filtering capacity above 99%.

The application relates to the technical field of optical materials and optical devices, and provides a preparation method of a variable-grating-constant circular grating and the variable-grating-constant circular grating. The preparation method comprises the following steps: a pulse laser beam is incident from a front surface of a transparent optical medium, penetrates the transparent optical medium and is focused on a rear surface of the transparent optical medium; a plasma region is formed on the rear surface of the transparent optical medium, and the plasma region reflects part of the pulse laser beam; the reflected pulse laser beam diverges and propagates inside the transparent optical medium, returns to the front surface of the transparent optical medium, and induces local phase change damage of the material of the front surface of the transparent optical medium; by adjusting the wavelength, energy and focal point relative position of the pulse laser beam, a non-equal-interval concentric circular ring damage structure is formed on the front surface of the transparent optical medium, and the variable-grating-constant circular grating is obtained. The problems of insufficient machining precision and great control difficulty in the traditional preparation method of the variable-grating-constant circular grating are solved.

The invention provides a twin beam generation method based on self-phase modulation and an application method thereof. The twin beam generation method comprises the following steps: acquiring an ultrafast laser pulse; the ultrafast laser pulse is controlled to be propagated in the optical Kerr medium, the ultrafast laser pulse interacts with the optical Kerr medium during propagation to generate self-phase modulation, two symmetric sidebands are generated, and the symmetric center of the two sidebands is a center frequency region of the ultrafast laser pulse; the two sidebands are taken out from the ultrafast laser pulse at the same time, and two twin beams with ideal quantum correlation characteristics are obtained. The ultrafast laser pulse generates self-phase modulation in the optical fiber or interacts with the optical Kerr material in a free space to generate self-phase modulation, and the method for taking out the twin beams with the quantum correlation characteristic also belongs to the category of the invention. The method can generate high-power and high-repetition-frequency ultrafast twin beams, simplifies the generation process of the twin beams, and is high in robustness, low in cost and easy to implement.

The invention discloses an ocean underwater optical window photon antifouling device based on a miniature light-emitting device, and relates to the technical field of ocean underwater optical equipment antifouling. The device comprises an optical window made of quartz glass, a deep ultraviolet light source, a first optical medium and an optical device, the deep ultraviolet light source can emit deep ultraviolet light with the wavelength smaller than 280 nm, and the deep ultraviolet light penetrates through the optical window to kill biological fouling on the outer surface of the deep ultraviolet light source; the first optical medium is arranged between the optical window and the optical device, the surface of the first optical medium is provided with a microstructure with a hollowed-out area, and the hollowed-out area corresponds to a projection area of the optical device, so that an optical path is prevented from being interfered. Through the design of the integrated deep ultraviolet light source, high efficiency, non-toxicity and pollution prevention are realized, the light transmission performance of an optical system is not influenced, the integration level is high, the environmental adaptability is high, and the device is suitable for underwater optical equipment for sea-based optical signal receiving and transmitting, strong laser emission and the like.

A first circuit sends electrical data. The sent electrical data is targeted toward a second circuit. The electrical data is sent to a vertical-cavity surface-emitting laser (VCSEL), where the VCSEL comprises a multimodal VCSEL that supports one or more high-order transverse modes. A mode of the VCSEL is modulated. The modulating comprises altering current to the VCSEL. The modulating includes emitting, by the VCSEL, a mode-modulated beam (MMB). The MMB is based on the electrical data that was sent. The MMB is coupled optically to an optical medium. The optical medium is further coupled to a mode-dependent optical element (MDOE). The MDOE decodes the MMB into the electrical data that was sent. The electrical data that was decoded is delivered to a second circuit.

The invention discloses a wearable flexible optical waveguide array sensing system and method, and belongs to the technical field of respiratory monitoring. A wearable flexible optical waveguide array sensing system comprises a flexible optical waveguide array sensing module attached to the thoracic and abdominal surface of a user, and further comprises a signal acquisition and processing circuit electrically connected with a signal and power supply interface of the flexible optical waveguide array sensing module; the flexible optical waveguide array sensing module comprises two oppositely arranged flexible circuit boards and a flexible optical medium layer arranged between the two flexible circuit boards, and the flexible circuit board on each side is provided with a plurality of optical sensing units arranged in an array; the flexible printed circuit board multi-layer packaging design is adopted, the device can be directly attached to the thoracic and abdominal surface to be worn for a long time without affecting the natural rhythm of respiration, the system integration degree is high, the size is small, power consumption is low, the device has the advantages of being high in precision, resistant to electromagnetic interference, high in real-time performance and the like, and the device is suitable for being used as a real-time sensing module in respiration rehabilitation training and exoskeleton control.

A spatial projection apparatus is provided. The apparatus includes an optical medium that diffuses a projected light. The apparatus further includes a light guide optical system that guides the projected light diffused by the optical medium and forms an image on a spatial imaging unit. The optical medium can be formed with a plate shape, a film shape, a three-dimensional shape including unevenness, in smoke-form, fluid-form, or mist-form.

Aspects of the invention relate to an optical switch, a method of operating an optical switch, and a system comprising an optical switch. An optical switch includes an input for receiving an optical data input and an optical address input. The optical switch further includes an output for outputting an optical data output. The optical switch additionally includes a first non-linear optical medium, where the first non-linear optical medium is arranged to combine the optical data input and the optical address input to generate the optical data output. A frequency of the optical data output is dependent on a frequency of the optical data input and a frequency of the optical address input.

A non-invasive substance analysis device (1) comprises: an optical medium (10); an excitation light source (20) that emits first excitation light (21a); an optical position detector (45); and an optical path switch (30). The optical medium (10) includes: a first placement region (15) on which a sample (18) is placed; and a second placement region (16) on which a reference substance (19) is placed. The light position detector (45) detects the position of a probe light (41) that is output from the optical medium (10). The optical path switch (30) switches the optical path of the first excitation light (21a) between a first optical path (24) and a second optical path (25). The first placement region (15) is irradiated with the first excitation light (21a) traveling through the first optical path (24). The second placement region (16) is irradiated with the first excitation light (21a) traveling through the second optical path (25).

Devices having at least one nanostructured layer derived from a binary sequence written onto an optical medium and methods of preparing the nanostructured layers.

The application discloses a continuous medium coherent array edge emitting semiconductor laser and a preparation method thereof. The laser comprises a conductive substrate, an epitaxial layer formed on the upper surface of the conductive substrate, a rear-end optical medium waveguide area and a front-end optical medium waveguide area located on both sides of the epitaxial layer. The upper surface of the epitaxial layer is provided with a one-dimensional array ridge waveguide area. A rear-end phase grating layer is etched on the rear-end optical medium waveguide area, and a front-end phase grating layer is etched on the front-end optical medium waveguide area. A P-face electrode is arranged on the upper surface of the one-dimensional array ridge waveguide area, an N-face electrode is arranged on the lower surface of the conductive substrate, a high-reflection film is arranged on the end surface of the rear-end phase grating layer, and an anti-reflection film is arranged on the end surface of the front-end phase grating layer. The laser of the application can realize in-phase mode lasing without the selection of supermodes by external optical elements, and the optical field has an ultra-narrow divergence angle in the slow-axis direction of the far field, so that the coupling efficiency of the array semiconductor laser and the optical fiber is greatly improved.

The excitation light source (1) emits excitation light that advances in the optical medium (3) toward the sample (5) placed on the sample placement surface. The probe light source (2) emits probe light advancing in the optical medium (3). The light position detector (4) detects the position of the emitted probe light emitted from the optical medium (3). The arithmetic unit (11) calculates the position of the probe light emitted by the light position detector (4) when the sample (5) is a reference substance that absorbs the excitation light and does not have a specific absorption peak within the excitation wavelength of the excitation light, and the position of the probe light emitted by the light position detector (4) when the sample (5) is a biological substance. The amount or concentration of the biological component in the biological substance is calculated.

A first circuit is coupled to a second circuit. The coupling is based on a first optical link. The first optical link includes a first optical source and a first optical medium. The first optical source can include a ring resonator, a vertical-cavity surface-emitting laser (VCSEL), etc. The optical medium can include a fiberoptic cable, a multicore fiber cable, a waveguide, and so on. The plurality of optical links includes a plurality of spare optical links. Data is sent by the first circuit to the second circuit. The sending is based on the first optical link. The optical links are tested, based on a round robin protocol. The testing includes determining a failure within the first optical link. The first optical link is replaced with a second optical link. The second optical link is within the spare optical links. The replacing is transparent to the sending.

This application provides a light-emitting packaging structure and a method for fabricating the light-emitting packaging structure. The light-emitting packaging structure includes: a light-emitting array having a light-emitting surface; a multi-channel light transmission medium disposed on one side of the light-emitting array with the light-emitting surface, the multi-channel light transmission medium having a light-incident surface, the light-emitting surface and the light-incident surface being opposite to each other; and an optical medium layer disposed between the light-emitting surface and the light-incident surface, the optical medium layer being in contact with both the light-emitting surface and the light-incident surface, the refractive index of the optical medium layer being matched with the refractive index of the multi-channel light transmission medium. This application solves the problem of low packaging reliability caused by small packaging alignment tolerance in existing light-emitting packaging structures.

The invention relates to the technical field of integrated photonic devices and laser radiation regulation and control, in particular to a far-field directional tunable laser based on a magneto-optical medium and an optical flat band and a method of the far-field directional tunable laser based on the magneto-optical medium and the optical flat band. The dielectric layer is used for providing negative dielectric response and providing non-reciprocal optical response under the action of an external magnetic field; the silicon waveguide layer is deposited on the magneto-optical medium substrate layer, gain medium areas are discontinuously embedded in the silicon waveguide layer in the axial direction, and the silicon waveguide layer is used for providing the energy flow direction opposite to the magneto-optical substrate; and the transparent conductive oxide covering layer covers the silicon waveguide layer and the gain medium region and is used for adjusting the optical environment of the upper cladding. A remarkable nonreciprocal characteristic is shown under the action of an external magnetic field, a dispersion curve can be overturned by changing the direction of the magnetic field, then the far-field radiation direction of laser is driven to deflect, and dynamic regulation and control of the laser direction can be achieved without mechanical parts.

A sample carrier for receiving a sample includes an optical medium in which the sample is received, the optical medium having a first refractive index. A window portion defining two parallel surfaces includes an optically transparent material having a second refractive index, and is arranged at a bottom side of the sample carrier. The first and second refractive indices do not deviate by more than 2.5%.

The invention provides a display flash point eliminating film with a micro-nano structure, the display flash point eliminating film comprises a diffusion layer, a base film layer and a microstructure layer from a light incident surface to a light emergent surface, the diffusion layer is composed of a layer of uniformly distributed diffusion particles and a first optical medium wrapping the diffusion particles, the base film layer is made of a transparent optical material, and the microstructure layer is made of a transparent transparent material. The microstructure layer comprises a micro-nano structure and a second optical medium wrapping the micro-nano structure, and the micro-nano structure is protrusions arranged periodically. Through the unique microstructure design, the OLED light source can be accurately regulated and controlled through the display flash point eliminating film, screen flash points caused by AG glass can be reduced, light rays can be efficiently utilized, and the front brightness and definition of a display screen are remarkably improved.