71 results about "Waveguide (optics)" patented technology

The invention discloses an optical waveguide and a preparation method thereof, relates to the technical field of optics, and is used for solving the problems of high processing difficulty, low yield and high cost of the existing array optical waveguide. The optical waveguide comprises a turning waveguide which is provided with a light incident surface, a first surface, a second surface and a plurality of first light splitting surfaces, the first surface and the second surface are arranged in parallel, the first light splitting surfaces are arranged in parallel, the included angle between the first light splitting surfaces and the first surface is smaller than 90 degrees, and the first light splitting surfaces enable light entering the turning waveguide from the light incident surface to be partially reflected; the reflected light is transmitted to the coupling-out waveguide; the coupling-out waveguide and the turning waveguide are spliced, so that light entering the coupling-out waveguide from the turning waveguide is emitted out of the coupling-out waveguide. The first beam splitting surface of the turning waveguide is not perpendicular to the first surface of the turning waveguide, compared with an existing array optical waveguide, the situation that the perpendicularity precision of the beam splitting surface and the surface of the optical waveguide needs to be strictly controlled in the machining process can be avoided, and therefore the machining difficulty can be lowered, the yield can be improved, and cost can be reduced.

Embodiments disclosed herein include electronic packages with photonics integrated circuits (PICs). In an embodiment, an electronic package comprises a glass substrate with a first recess and a second recess. In an embodiment, a PIC is in the first recess. In an embodiment, an optics module is in the second recess, and an optical waveguide is embedded in the glass substrate between the first recess and the second recess. In an embodiment, the optical waveguide optically couples the PIC to the optics module.

A method and apparatus for inscribing a high-temperature stable Bragg grating in an optical waveguide, comprising the steps of: providing the optical waveguide; providing electromagnetic radiation from an ultrashort pulse duration laser, wherein the wavelength of the electromagnetic radiation has a characteristic wavelength in the wavelength range from 150 nanometers (nm) to 2.0 micrometers (μm); providing cylindrical focusing optics; providing a diffractive optical element that when exposed to the focused ultrashort laser pulse, creates an interference pattern on the optical waveguide, wherein the irradiation step comprises irradiating a surface of the diffractive optical element with the focused electromagnetic radiation, the electromagnetic radiation incident on the optical waveguide, from the diffractive optical element, being sufficiently intensive to cause permanent (Type II) change in the index of refraction within multiple Bragg grating planes in the core of the optical waveguide resulting from at least one micropore.

A lithographic apparatus includes a projection system and an inspection system including a radiation system, a photonic integrated circuit system, and a detector system. The projection system projects an image of the patterning device onto a substrate. The radiation system directs radiation toward a target on the substrate to generate scattered radiation from the target. The radiation system includes a radiation source for generating radiation and an optical system for focusing the radiation onto a target. A photonic integrated circuit system includes a waveguide system integrated on a board and a radiation coupler disposed at a waveguide of the waveguide system. The radiation coupler initiates at least a portion of the scattered radiation into the waveguide system. A detector system receives the scattered radiation from the waveguide system and generates a measurement signal based on the scattered radiation.

The invention discloses a dual-wavelength frequency doubling regulation and control method based on a PPLN waveguide, and relates to the technical field of nonlinear optics. The method comprises the following steps: constructing a PPLN waveguide model, and determining a fundamental frequency light mode and a frequency doubling light mode; calculating effective refractive indexes of the fundamental frequency light and the frequency doubling light at respective wavelengths; the polarization period is calculated according to the effective refractive index, any target polarization period is fixed, the target polarization period is configured to correspond to two different working wavelengths at the same time, and therefore dual-wavelength frequency doubling light with a specific wave crest interval is generated at the output end of the waveguide; the wave crest interval is regulated and controlled by selecting different polarization periods; according to the invention, dynamic control of dual-wavelength frequency multiplication output is realized by changing the size of a polarization period; the single waveguide can complete various optical function design ideas, and has certain value for research in related fields such as multi-wavelength lasers and wavelength multiplexing communication.

The invention discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are connected in sequence, the output optical fiber is used for outputting point ring light beams, a cladding layer, wrapping the second fiber core, of at least partial area, close to the output optical fiber, of the optical waveguide comprises a second conical structure, and the cross section of the second conical structure is annular. The outer diameter of the second conical structure is gradually increased in the light beam transmission direction, and the second conical structure is used for adjusting the light path of the point ring light beam so as to adjust the divergence angle of inner and outer ring light beams. And the optical output head is used for outputting the light beam adjusted by the optical waveguide. The pre-modulated light from the output optical fiber is accurately regulated and controlled, the divergence angle of the output light is adjusted, the light beam quality is improved, and meanwhile the device has the advantages of being simple in structure, low in cost and high in stability.

The invention discloses a topology protection Hong-Ou-Mandel interferometer based on a pi phase regulation and control grating, and belongs to the technical field of integrated photonics and quantum optics. The interferometer comprises a first waveguide and a second waveguide which are arranged side by side on a silicon dioxide substrate, and each waveguide comprises an input waveguide, a grating waveguide and an output waveguide. The two grating waveguides are provided with periodic notch grooves, and the positions of the notch grooves are symmetrically distributed about a waveguide center connecting line, so that a pi coupling phase difference is introduced between coupling in the two waveguides. The TE-TM coupling strength in the waveguides is enabled to be equal to the TE-TE coupling strength and the TM-TM coupling strength between the waveguides by adjusting the waveguide distance and the notch groove size, and the system enters a topological non-trivialness phase when delta phi is equal to pi, so that a compact topological boundary mode is formed. The structure provides an evolution path protected by topology for two-photon HOM interference, realizes interference visibility close to a theoretical limit, shows strong robustness for manufacturing errors and propagation distance changes, is obviously reduced in device size, and is suitable for high-density integrated quantum photon chips.

Aspects of the disclosure relate to the use of an optical detection scheme enabling multiple imaging sub-systems concurrently optimized for retrieving multiple characterization modalities. The feature described is an offset illumination and detection arrangement for a multimodal imaging probe. The imaging probe comprises multiple waveguides disposed within a torque-transfer coil, distally terminating at longitudinally separated positions. A first waveguide may have focusing optics for focused illumination and / or detection. Any number of other waveguides may be deployed for illumination and / or detection having no focusing optics. The disclosure enables high-fidelity multimodal imaging systems.

The invention discloses a method for improving the uniformity of an optical waveguide imaging picture and an optical waveguide, and relates to the technical field of optics, and the method comprises the steps: obtaining a brightness diagram of an image outputted by the optical waveguide through a test device; obtaining the brightness distribution condition of the image according to the brightness map; determining film coating parameters according to the brightness distribution condition, wherein the film coating parameters comprise a film coating area, a film coating thickness, a film coating type and a film coating layer number; selective coating is carried out on a grating area corresponding to the optical waveguide according to the coating parameters, so that compensation areas with different diffraction efficiencies are formed; and repeating the steps until the brightness uniformity of the optical waveguide reaches a target value. According to the method for improving the uniformity of the imaging picture of the optical waveguide and the optical waveguide, the original structural design of the grating does not need to be changed, accurate compensation is achieved through regionalized selective coating in the post-processing stage, and various AR waveguide products needing the high-uniformity display effect can be effectively adapted.

The application discloses an optical waveguide and a preparation method thereof, relates to the technical field of optics, and aims to solve the problems of high processing difficulty, low yield and high cost of an existing array optical waveguide. The optical waveguide comprises a turning waveguide which is provided with an incident light surface, a first surface, a second surface and a plurality of first light splitting surfaces, the first surface and the second surface are arranged in parallel, the plurality of first light splitting surfaces are arranged in parallel to each other, the included angle between the first light splitting surface and the first surface is less than 90 DEG, the first light splitting surface causes the light rays entering the turning waveguide from the incident light surface to partially reflect, and the reflected light rays propagate towards a coupling-out waveguide; the coupling-out waveguide is spliced with the turning waveguide and is used for making the light rays entering the coupling-out waveguide from the turning waveguide exit the coupling-out waveguide. The first light splitting surface of the turning waveguide is not arranged perpendicularly to the first surface, compared with the existing array optical waveguide, the perpendicularity precision of the light splitting surface to the surface of the optical waveguide in the processing can be avoided, therefore, the processing difficulty can be reduced, the yield can be improved, and the cost can be reduced.

The present disclosure describes near-eye display systems including an array of projectors and a one-dimensional exit pupil expander. The array of projectors can be arranged along a first dimension and can output image light towards an input coupler within a waveguide that provides one-dimensional exit pupil expansion. In some implementations, arrays of monochromatic projectors are implemented and arranged in offset columns. The input coupler in-couples the image light from the array of projectors into a TIR path within the waveguide. Different optical elements, including diffractive and reflective optics, may be implemented as the input coupler. The image light travels within the waveguide until it interacts with an output coupler. Upon interaction with the output coupler, the image light is expanded in a second dimension transverse to the first dimension and is coupled out of the waveguide.

The application provides a nonlinear optical crystal, a preparation method and application thereof, and has the chemical formula Y(C6H5SO3)3.9H2O, wherein the compound has good nonlinear optical performance, a band gap of 4.35eV, an ultraviolet cutoff edge near 285nm, a frequency doubling response of about 0.8 times of KH2PO4 (KDP), a shortest phase matching wave band near 300nm, good crystal growth habit, and simple preparation process and low preparation cost; the nonlinear optical crystal can be used for frequency conversion of laser output, the shortest phase matching wavelength is less than 300nm, and can produce 2 times frequency doubling harmonic output on a laser beam with a wavelength of 1064nm; meanwhile, the crystal can be used for a harmonic generator from an infrared region to an ultraviolet region, an optical parametric and amplifier device, an optical waveguide device and a nonlinear optical device, can meet a larger frequency doubling coefficient, has larger birefringence, and has wide application in the field of nonlinear optics.

A display apparatus having a compact projector is provided. The head-mounted device may have a nose bridge joining the first waveguide and the second waveguide. The first waveguide and the second waveguide may overlap with respective eye-fit regions. The device may include a display projector located in the nose bridge. The display projector may include a display panel that emits image light. The nose bridge may include optics that direct the image light to the first waveguide and the second waveguide. Optical couplers on the first and second waveguides may couple the image light into the first and second waveguides, and may couple the image light out of the first and second waveguides and toward the eye-fit regions. The optics in the nasal bridge may include scanning mirrors, additional waveguides, and / or binocular combined free form prisms.

The invention relates to polymerizable liquid crystal compositions (as a subcategory of liquid crystal materials) comprising an alignment additive, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), to formulations, polymers and polymer films obtained from such compositions, and to the use of the compositions, formulations, polymers and polymer films in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like polarizers, optical compensators, reflective films, diffraction or surface gratings, Bragg polarization gratings (Bragg PG), polarization volume gratings (PVG), polarization volume holograms (PVH), Pancharatnam Berry (PB) gratings, nonmechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors, lenses or PB lenses.

A diffractive optical element comprising at least one achromatic half-wave plate and at least one chromatic half-wave plate, each half-wave plate comprising at least two layers of a polymerized chiral liquid crystal (LC) material on a substrate, wherein at least one of the substrates has a periodic surface grating, a method for its preparation. Also, its use in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like non-mechanical beam steering elements, optical waveguides, optical couplers, optical combiners, optical deflectors, polarization beam splitters, partial mirrors or lenses.

The invention discloses a Co-Package Optics (Co-Package Optics) scheme based on a glass through hole adapter plate. The Co-Package Optics scheme comprises the glass through hole adapter plate and a laser direct writing optical waveguide. The invention further discloses an implementation method based on the laser direct writing optical waveguide. According to the CPO optical engine, the laser direct writing optical waveguide is arranged on the glass substrate and is matched with the adapter plate based on the TGV glass through hole, so that the reliability of the whole CPO optical engine is improved, the assembly production time of a user for optical path coupling is saved, and the overall product cost is reduced.

The application discloses a kind of multi-parameter quantum sensing optical quantum chip and preparation method and application thereof, it is related to quantum information technology, optoelectronic technology and nonlinear optics field.The optical quantum chip provided by the application includes substrate, and optical path is arranged on the substrate;The optical path includes the classical laser processing unit connected and arranged, nonlinear unit, sensing unit and quantum state output unit;Nonlinear unit includes the first entangled photon pair generation waveguide and the second entangled photon pair generation waveguide arranged in parallel;Sensing unit includes reference arm waveguide and sensing arm waveguide;Quantum state output unit includes the third beam splitter in communication with reference arm and sensing arm.The optical quantum chip provided by the application can significantly improve the sensitivity, accuracy, spatial resolution, expansibility, integration and stability of optical quantum sensing.The application also provides the preparation method and application of the above optical quantum sensor.

The present application belongs to the field of ultrafast laser and nonlinear optics, and particularly relates to a near-infrared few-cycle pulse generation system and method based on high-pressure nonlinear enhancement. The method fills inert gas into a hollow-core anti-resonant optical fiber and adjusts the gas pressure to the high-pressure interval of 20 bar-90 bar, enhances the nonlinear coefficient of the gas to realize the dispersion and nonlinear dynamic balance of the pulse in the waveguide, thereby compensating for the insufficient peak power of the low-energy pump pulse. The pulse feedback module collects the output time-domain intensity waveform and extracts the main peak energy proportion and the splitting factor as feedback indexes. The control module diagnoses the offset state of the self-compression focal point relative to the truncated end face according to the feedback indexes, controls the small-step pressure regulation of the gas pressure regulation module to anchor the focal point on the truncated end face, and directly outputs high-quality and high-coherence near-infrared few-cycle pulses without external dispersion compensation devices.

The utility model discloses a PLC optical waveguide-based RGB beam combination optical chip end face efficient coupling structure, relates to the technical field of optics and photoelectronics, and solves the problem that in the prior art, a lens is adopted for laser beam combination, and light loss is likely to be generated. The optical fiber combiner comprises an optical fiber array assembly, the lower portion of the optical fiber array assembly is connected with a bottom connecting piece, and the upper portion of the bottom connecting piece is connected with a beam combining chip arranged at the output end of the optical fiber array assembly in an abutting mode. The optical fiber array assembly and the beam combining optical chip are connected into a whole through the connecting plate, and the light emitting diode is simple in structure, low in cost, high in light emitting efficiency and convenient to process. The beam combining optical chip is arranged on the output light end face of the optical fiber array assembly in an abutting mode, end face coupling of the optical fiber array assembly and the beam combining optical chip is achieved, no connecting glue exists in the optical path transmission process, and the problem of optical loss caused by pasting glue in an optical path is solved.

A pupil expansion system and a display device, relating to the technical field of optics. Provided is a pupil expansion system, comprising a light source, a reflective grating, and a beam shaping element. First, pupil expansion of a beam is implemented by using the reflective grating, so that a user can observe image information in a wider range. In addition, compared with a function of pupil expansion by means of an optical waveguide, there is no process of coupling in and out when using the reflective grating, which reduces energy loss, improves the energy utilization rate, and improves the experience of a user when using a device comprising the pupil expansion system. Second, the beam shaping element is located on an incident light path and / or an emergent light path of the reflective grating, for beam shaping. The beam shaping element performs beam shaping and, in combination with a pupil expansion function of the reflective grating, enables a human eye to receive a circular beam, thereby improving the visual experience of the user.

To provide diffractive optical elements, related systems, and methods that reduce re-bounce-induced light loss. [Solution] The display device includes a waveguide with an internally coupled optical element that reduces the re-bounce of internally coupled light and improves the overall internal coupling efficiency and / or uniformity. The waveguide includes an internally coupled optical element that receives light from a light source and / or projection optics, internally couples the received light, and propagates through the waveguide in the direction of propagation by total internal reflection. Once internally coupled in the waveguide, the light is subject to re-bounce, where the light is reflected from the waveguide surface, and after reflection, it may strike the internally coupled optical element. In response to striking the internally coupled optical element, the light is partially absorbed and / or externally coupled by the optical element, thereby substantially reducing the amount of internally coupled light propagating through the waveguide.

The invention relates to an apparatus and a method for depositing layers on one or more substrates (21), wherein a process chamber (12) arranged in a housing (2) having housing walls (3, 4, 5) is bounded at the top by a process chamber ceiling (13) and at the bottom by a susceptor arrangement (14, 15, 16) for receiving the one or more substrates (21), and a process gas provided by a gas mixing system (10) can be fed into said process chamber (12) by a gas inlet element (6), wherein the susceptor arrangement (14, 15, 16) is heatable by a heating device (17) to a process temperature of > 800°C, wherein the process chamber ceiling (13) is at such a vertical distance from the susceptor arrangement (14, 15, 16) that the process chamber ceiling (13) reaches a temperature of at least 500°C, and having an optical device (22) that interacts with the surface of the substrate (21) or of the susceptor arrangement (14, 15, 16) via an optical path (25) through an opening (23) in the housing wall (3). According to the invention, the optical device (22) shall have an optical waveguide (101, 101') which is formed in particular by a fibre optic cable and connects the opening (23) to an optical element (103) positioned in an optics module (102) at a distance from the opening (23).

The invention relates to an apparatus and a method for depositing layers on one or more substrates (21), wherein a process chamber (12) arranged in a housing (2) having housing walls (3, 4, 5) is bounded at the top by a process chamber ceiling (13) and at the bottom by a susceptor arrangement (14, 15, 16) for receiving the one or more substrates (21), and a process gas provided by a gas mixing system (10) can be fed into said process chamber (12) by a gas inlet element (6), wherein the susceptor arrangement (14, 15, 16) is heatable by a heating device (17) to a process temperature of > 800°C, wherein the process chamber ceiling (13) is at such a vertical distance from the susceptor arrangement (14, 15, 16) that the process chamber ceiling (13) reaches a temperature of at least 500°C, and having an optical device (22) that interacts with the surface of the substrate (21) or of the susceptor arrangement (14, 15, 16) via an optical path (25) through an opening (23) in the housing wall (3). According to the invention, the optical device (22) shall have an optical waveguide (101, 101') which is formed in particular by a fibre optic cable and connects the opening (23) to an optical element (103) positioned in an optics module (102) at a distance from the opening (23).

The invention relates to the technical field of optics, and discloses an optical assembly, a diffraction optical waveguide and electronic equipment. The optical assembly includes a grating and a plurality of fillers. The grating comprises a plurality of grooves arranged along a first direction. The plurality of fillers are respectively filled in different grooves in the plurality of grooves, and the refractive indexes of at least two fillers in the plurality of fillers are different. Thus, in the process of optimal design of the optical assembly, the thicknesses of the multiple fillers can be adjusted, the refractive indexes of the multiple fillers can also be adjusted, the degree of freedom of design of the optical assembly is more, and therefore the optical performance of the optical assembly can be more effectively optimized.

Provided are an optical waveguide and an optical waveguide sight, relating to optics technical field. In the optical waveguide sight, a light source and a collimating element are sequentially arranged along an in-coupling channel of a non-pupil-expansion optical waveguide. The collimating element is configured to collimate light beam emitted from light source, forming first parallel light beam, which is transmitted to the in-coupling region. The non-pupil-expansion optical waveguide is configured to redirect and transmit the first parallel light beam to an out-coupling region thereof to form second parallel light beam that is emitted to human eyes. The non-pupil-expansion optical waveguide enables efficient transmission and expansion of optical path with compact structure, broadening effective observation field of view while maintaining small footprint. Moreover, precise light-guiding characteristics of the optical waveguide prevents refraction deviations of light when it propagates at edges, reducing chromatic aberration and aiming errors, thereby enhancing display effect.

A holographic optical waveguide and a sight, relating to the technical field of optics. A hologram and a holographic waveguide grating are integrated on one element, and optical waveguide transmission characteristics and grating diffraction characteristics are used to achieve an aiming function by means of one optical element, thereby improving the assembly precision of the holographic optical waveguide, reducing the assembly difficulty, and improving the assembly yield. An optical waveguide is added to a conventional hologram, waveguide light transmission characteristics are used to replace conventional geometric optics, and light transmission is implemented by means of refraction and reflection by the optical element, thereby achieving a smaller volume and higher precision. The optical waveguide is provided with an in-coupling waveguide holographic grating and an out-coupling waveguide holographic grating, so that chromatic aberration correction can be performed on a wavelength, and therefore the imaging effect is better than that of conventional monolithic gratings. In addition, a light beam is totally reflected in a substrate and transmitted to the out-coupling waveguide holographic grating, thereby reducing transmission, reducing energy loss, improving the light effect, enabling human eyes to clearly observe reticle information on the hologram, and improving user experience.

The application relates to the technical field of optics, and discloses an optical device. The optical device comprises an optical display module, the optical display module comprising a first image source assembly and a first optical waveguide structure; when the first image source assembly has a first position, light rays corresponding to the first image source assembly and incident to the first optical waveguide structure have a first included angle with the first optical waveguide structure, and the optical display module has a first virtual image position; when the position of the first image source assembly changes, the included angle between the light rays corresponding to the first image source assembly and incident to the first optical waveguide structure and the first optical waveguide structure also changes, and the virtual image position of the optical display module also changes. In this way, the optical device provided by the application can realize the change of the virtual image position by adjusting the position of the first image source assembly relative to the first optical waveguide structure, thereby meeting the demand of a user for different virtual image positions.

A multi-twist waveplate comprising at least two layers of a polymerized chiral liquid crystal (LC) material on a substrate containing a surface grating, a method for its preparation, and its use in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like non-mechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors or lenses.

Aspects of the present disclosure configure a processor to detect faults in a printed circuit board (PCB) solder mask using an optical waveguide. The processor directs an optical beam to an input of one or more optical waveguides embedded in a protective coating layer of a PCB, the protective coating layer being adjacent to one or more traces of the PCB. The processor measures a beam characteristic of the optical beam that is output by the one or more optical waveguides. The processor detects a disruption of the optical beam that is output by the one or more optical waveguides based on the beam characteristic. The processor detects a fault in the protective coating layer of the PCB based on detecting the disruption of the optical beam that is output by the one or more optical waveguides.

An optical chip includes an optical fiber connector, a photonic integrated circuit PIC, a protective housing, and an injection molding layer. The protective housing is located between the injection molding layer and the PIC, and coupling space is formed between the protective housing and the PIC. The optical fiber connector includes an optical fiber. The optical fiber connector has a first connection end that faces the PIC and a second connection end that is away from the PIC. A first coupling end of the optical fiber passes through the first connection end. The first coupling end and a second coupling end of an optical waveguide of the PIC both extend into the coupling space, and the first coupling end located in the coupling space is coupled to the second coupling end. The second connection end is configured to detachably connect to another optical fiber connector.