150 results about "Waveguide (optics)" patented technology

The invention belongs to the technical field of photoelectronics, and particularly relates to a wide-spectrum narrow-linewidth semiconductor mode-locked laser, and the collaboration of a saturable absorption region SA and a resonator is reflected in time domain-frequency domain dual optimization. And the resonator optimizes the frequency domain characteristics through nonlinear broadening, phase synchronization and mode purification. The SA adjusts a mode locking threshold value in real time through dynamic bias voltage, the pulse energy stability is ensured, dispersion management of the resonator balances the SPM and group velocity dispersion, spectrum splitting is avoided, and the dissipative soliton form is maintained. Besides, due to heterogeneous integration of the InP-based SA and the SiN-based resonator, wafer bonding of the InP-based SA and the SiN-based resonator is realized, high-efficiency energy transfer is realized through the low-loss conical waveguide, a high-performance frequency comb with a wide spectrum and a narrow pulse width is output, and the high-performance frequency comb can be widely applied to the fields of ultrafast optics, coherent light communication and precision spectroscopy.

The invention belongs to the technical field of optics, and particularly relates to a terahertz radiation source system of an air plasma antenna, which comprises a laser, an air plasma generation unit, a terahertz radiation generation unit, a terahertz waveguide and transmission system, a detection analysis unit and a control synchronization system, the laser device is a high-power femtosecond laser device and is used for generating ultra-short pulse laser, the pulses can excite plasma in the air, and the problem that a traditional photoconductive antenna terahertz source is low in terahertz radiation intensity due to limitation of a material damage threshold value is solved; the bandwidth of terahertz radiation can be regulated and controlled by adjusting the distance between the plasma antennas, and the interval time of switching on the plasma antennas can be controlled by controlling the delay time of the third beam of laser, so that the regulation and control of the terahertz wave intensity are realized.

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.

An image light guide for conveying a virtual image including a first surface and a parallel second surface, an in-coupling diffractive optic arranged along the first surface and / or the second surface, wherein the in-coupling diffractive comprises a first zone having a first set of diffractive features and a second zone having a second of diffractive features, and an out-coupling diffractive optic arranged along the first surface and / or the second surface, wherein the out-coupling diffractive optic comprises a first area having two or more zones and a second area having two or more zones. Wherein an imaginary axis is oriented along a centerline of the out-coupling diffractive optic, image-bearing light in-coupled into the waveguide by the first zone of the in-coupling diffractive optic is operable to propagate across the imaginary axis to the first area of the out-coupling diffractive optic, and image-bearing light in-coupled into the waveguide by the second zone of the in-coupling diffractive optic is operable to propagate across the imaginary axis to the second area of the out-coupling diffractive optic.

An electronic device may include a waveguide with an input coupler and an output coupler. The input coupler may receive the image light from imaging optics. The input coupler may be an input coupling prism and the imaging optics may include lens elements. World light may be viewable at an eye box through the output coupler. Biasing, compensation, and / or prescription lenses may overlap the output coupler. The input coupling prism, the lens elements in the imaging optics, and / or one or more of the biasing, compensation, and prescription lenses may be formed from gradient index (GRIN) material. The GRIN material may have a gradient refractive index that varies in one or more gradient directions. Use of GRIN materials may minimize the volume required to form the device without sacrificing optical performance. In addition, the GRIN materials may compensate for dispersion and aberrations in the device.

The present Specification is directed to devices for controlling the phase of a light signal in a surface waveguide of a planar-lightwave circuit by controlling a stress in the waveguide material. Phase controllers disclosed can impart stresses of opposite signs in a material such that a desired effect on the refractive index of an optical material can be accentuated. As a result, a greater change in the refractive index of the material can be realized in a phase controller that requires less chip real estate and / or at lower voltages. In some embodiments, a phase-control module includes a pair of complimentary stress-optic phase controllers, one having electrodes disposed on the top and bottom of a piezoelectric layer, while the other has electrodes disposed only on top of the piezoelectric layer. As a result, the phase controllers impart stress of opposite sign in the material beneath them.

An augmented-reality glasses comprises a plurality of panels of light emitters arranged to form an array of light emitters, wherein the array of light emitters includes light emitters of three colors; collimation optics for collimating light received from the array of light emitters; an optical coupler for receiving the collimated light; and a three-channel waveguide combiner for display of augmented-reality content to a wearer of the augmented-reality glasses, wherein each channel of the three-channel waveguide combiner respectively causes display of images of one color of the three colors generated by the light emitters. In some embodiments, the three-channel waveguide combiner is an optical waveguide with pupil replication and the optical coupler is an in-coupling optical element for coupling the collimated light into the three-channel waveguide combiner.

A viewing optics assembly for augmented reality includes a projector configured to generate image light and an eyepiece optically coupled to the projector. The eyepiece includes at least one eyepiece layer comprising a waveguide having a surface, an incoupling grating coupled to the waveguide, and an outcoupling grating coupled to the waveguide. The outcoupling grating comprises a first array of first ridges protruding from the surface of the waveguide, each of the first ridges having a first height in a direction perpendicular to the surface and a first width in a direction parallel to the surface and a plurality of second ridges, each of the plurality of second ridges protruding from a respective first ridge of the first ridges and having a second height and a second width. At least one of the first width or the second width varies as a function of position across the surface.

The invention belongs to the technical field of micro-nano optics, and discloses an on-chip topological metasurface and application thereof. The on-chip topological metasurface provided by the invention comprises a nano brick array, an optical waveguide layer and a dielectric substrate layer from top to bottom, the nano brick array is composed of a plurality of T-shaped topological super-structure atoms, and the nano brick array is prepared from a dielectric material. The on-chip topological metasurface is applied to multiplexing and storage of multi-channel information, wearable display equipment or an intelligent integrated photonic system. According to the topological metasurface on the full-dielectric sheet, the problems that in the prior art, due to the fact that the topological metasurface depends on metal materials to create singular points, large ohmic loss can be introduced, and integration compatibility is poor can be solved, the intrinsic ohmic loss of the metal can be avoided, and the overall performance of the topological metasurface on the full-dielectric sheet is improved. And the method is easy to be compatible with other mainstream on-chip optical devices.

Direct-bonded lamination for improved image clarity in optical devices is provided. An example process planarizes and plasma-activates optical surfaces to be laminated together, then forms direct bonds between the two surfaces without an adhesive or adhesive layer. This process provides improved optics with higher image brightness, less light scattering, better resolution, and higher image fidelity. The direct bonds also provide a refractory interface tolerant of much higher temperatures than conventional optical adhesives. The example process can be used to produce many types of improved optical components, such as improved laminated lenses, mirrors, beam splitters, collimators, prism systems, optical conduits, and mirrored waveguides for smartglasses and head-up displays (HUDs), which provide better image quality and elimination of the dark visual lines that are apparent to a human viewer when conventional adhesives are used in conventional lamination.

Direct-bonded lamination for improved image clarity in optical devices is provided. An example process planarizes and plasma-activates optical surfaces to be laminated together, then forms direct bonds between the two surfaces without an adhesive or adhesive layer. This process provides improved optics with higher image brightness, less light scattering, better resolution, and higher image fidelity. The direct bonds also provide a refractory interface tolerant of much higher temperatures than conventional optical adhesives. The example process can be used to produce many types of improved optical components, such as improved laminated lenses, mirrors, beam splitters, collimators, prism systems, optical conduits, and mirrored waveguides for smartglasses and head-up displays (HUDs), which provide better image quality and elimination of the dark visual lines that are apparent to a human viewer when conventional adhesives are used in conventional lamination.

A near-eye display system including an optics module having a projector operable to generate angularly encoded light beams and a camera operable to capture images of an environment, wherein the optics module is operable to convey at least a portion of the light beams to an eyebox. An electronics module having a controller in electrical connection with the optics module, a mounting module located between the electronics module and the optics module, wherein the electronics module is coupled with the optics module via the mounting module, and a first pivot located between the optics module and the electronics module, wherein the optics module is rotatable relative to the electronics module about a first axis. Wherein at least a portion of the optics module is rotatable relative to the electronics module about a second axis oriented transverse to the first axis. Wherein the electronics module includes first and second opposing surfaces, wherein at least a portion of the optics module extends in a first direction, parallel to the second axis, relative to the first surface, and wherein at least a portion of the optics module extends in a second direction opposite the first direction, parallel to the second axis, relative to the second surface.

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.

An optical display, including a first waveguide having a first set of surfaces, an input grating, a fold grating, and an output grating; an image input image node assembly; and a prismatic relay optics is provided. The prismatic relay optics may be configured to be optomechanically connected to the waveguide and the input image node assembly. The optical display is may also be configured to operate alone or as integrated with a headpiece to be used as a HUD. The HUD may have a first and a second configuration wherein the waveguide is decoupled or coupled.

The invention relates to polymerizable liquid crystal formulations (as a subcategory of liquid crystal material), especially to polymerizable ink formulations for inkjet printing, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), and which are comprising one or more polymerizable mesogenic compounds, also known as reactive mesogens (RMs), and one or more organic solvents selected from the group of aromatic ester and aromatic or aliphatic diester solvents, to polymers and polymer films obtained from such formulations, and to the use of the 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 projection module for a motor vehicle headlamp has a first light source with a light-emitting diode to emit light for generating a first light distribution. A second light source has a light-emitting diode emits light for generating a second light distribution. Primary optics contain first and second optical waveguides. The first optical waveguide has at least one light-entry surface for the light from the at least one first light source, and at least one light-emitting surface. The second optical waveguide has at least one light-entry surface for the light from the at least one second light source, and at least one light-emitting surface. Light exiting the light-emitting surfaces of the primary optics passes through secondary optics when the projection module is in use. One or more of the light-emitting diodes in the light sources are designed to emit light with a luminance of more than 400 cd / mm2.

The utility model discloses an optical waveguide camera and an optical system, and relates to the technical field of optics. The optical waveguide camera comprises an optical waveguide and an image acquisition device; the optical waveguide comprises a coupling-in grating and a coupling-out grating. The light beam is divided into two light beams by the coupling grating of the optical waveguide, and one light beam enters human eyes through the optical waveguide, so that the optical waveguide camera has an observation function; the other light beam is totally reflected in the optical waveguide and transmitted to the coupling-out grating, the light beam emitted by the coupling-out grating enters the image acquisition device, the image acquisition device converts an optical signal into an electric signal, and the electric signal is converted into image data, so that the recording of an image is realized; namely, a user can observe through the optical waveguide camera, and the optical waveguide camera can record the image; moreover, the second light beam is transmitted in the optical waveguide in a total reflection manner, thereby reducing the energy loss, improving the light efficiency, and improving the experience feeling of a user when the user uses the optical waveguide camera.

An augmented reality system includes a projector and projection optics coupled to the projector. The augmented reality system also includes an eyepiece waveguide including hybrid diffractive structure including: one or more first nanofeatures having first material with a first index of refraction; and one or more second nanofeatures having a second material with a second index of refraction.

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 utility model discloses a holographic optical waveguide, a sighting telescope and AR equipment, and relates to the technical field of optics. The optical path effect of the reflective sighting telescope is achieved in the mode that the propagation path of light is changed through the holographic waveguide sheet, meanwhile, the problem that the reflective sighting telescope is large in size and weight or poor in target display effect is solved, and the reflective sighting telescope has the advantages of being small in size, light in weight, good in display effect and the like. The size of the coupled image area entering the holographic waveguide sheet is consistent with the size of the coupled image area from the holographic waveguide sheet, so that the holographic waveguide sheet is a pupil-expanding-free holographic waveguide sheet, the coupled image does not need to be copied in the holographic optical waveguide, namely, the size of the coupled image area is consistent with the size of the coupled image area; and meanwhile, the coupling-in area and the coupling-out area are the same in size and are both larger than the preset size, so that the pupil-expansion-free holographic optical waveguide has a large exit pupil effect, the quality of the coupled-out image is high, the light effect loss is small, and the observation experience is good.

Augmented reality glasses (1) for projecting an AR image into an observation field, comprising a glasses frame (2) with a frame (3) and two temples (4) attached laterally to the frame (3), two glasses lenses (5), each mounted in the frame (3), a projection device (6) for generating and displaying images in an observation field intended for insertion, containing a light source tube (61) with at least one light source (611) for emitting at least one light beam and beam-shaping optics (612) designed to collimate and shape the at least one light beam, and a microscanner (62) for variably deflecting the at least one light beam, and a waveguide (7) attached in or on one of the glasses lenses (5),wherein the projection device (6) is mounted on or in an edge region of the frame (3) of the spectacle frame (2) or one of the spectacle lenses (5) and is thus connected to the spectacle frame (2) or the spectacle lens (5) in order to couple the at least one light beam into the waveguide (7).

The invention provides a high-compression-degree all-fiber vacuum compression state light source based on a waveguide resonant cavity, and relates to the technical field of quantum optics and quantum information. After laser passes through an isolator and a beam splitter, most of the laser enters a phase modulator, and a small part of the laser serves as background light; after the phase of the laser is modulated by the phase modulator, the laser enters the frequency doubling medium to generate pump light; pumping light returned by the waveguide resonant cavity enters the detector; the detector detects the intensity of the pump light returned from the waveguide resonant cavity, and the narrow-band filter filters the pump light and outputs compressed light; a waveguide crystal in the waveguide resonant cavity depends on laser emitted by the two-end coated tuning laser; the servo control system obtains an error signal through demodulation of a demodulation signal sent by the signal generator and an electric signal output by the detector, the error signal enters a control module of the servo control system to obtain a signal required for controlling the wavelength of the laser, and the wavelength is adjusted in real time by controlling tunable parameters of the laser. And the locking of the laser wavelength and the waveguide resonant cavity is realized.

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 augmented reality system includes a projector and projection optics coupled to the projector. The augmented reality system also includes an eyepiece waveguide including a hybrid diffractive structure including one or more first nanofeatures having a first material with a first refractive index and one or more second nanofeatures having a second material with a second refractive index.

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.

An image light guide system for conveying a virtual image that includes a first waveguide having a first refractive index and a second waveguide having a second refractive index. The first waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of a first wavelength range. The second waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of at least a second wavelength range. An image light guide system for conveying a virtual image that includes a first waveguide having a first refractive index and a second waveguide having a second refractive index. The first waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of a first wavelength range. The second waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of at least a second wavelength range.

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.