70 results about "Output coupler" patented technology

A display device includes: an image projector including an image forming device and a meta-lens module and configured to output image light formed by the image forming device; and a meta-waveguide configured to transfer the image light output from the image projector, to an observer's field of view, the meta-waveguide including waveguide element configured to totally reflect light inside, an input coupler including a plurality of first nanostructures forming a first phase gradient in a first direction and configured to couple the image light from the image projector to an inside of the waveguide element, and an output coupler including a plurality of second nanostructures forming a second phase gradient in a second direction different from the first direction and configured to output the light coupled to the inside of the waveguide element by the input coupler, to an outside of the waveguide element.

Provided are a waveguide optical device and a near-eye display apparatus including the same. The waveguide optical device includes a waveguide that propagates light, an input coupler that inputs the light into the waveguide, and an output coupler that outputs the light propagating in the waveguide to the outside, wherein the output coupler includes a plurality of grating regions, which are arranged to be spaced apart from each other.

An eyepiece device configured to display an image to an eye is provided. The eyepiece device includes a waveguide, an indentation layer, and a projection module. The waveguide has a first surface, a second surface opposite to the first surface, an input coupler located at the second surface, and an output coupler located at the second surface. The indentation layer is disposed on the first surface and has a third surface facing away from the waveguide, wherein the third surface has a plurality of indentations configured to scatter an ambient light incident thereon, so as to reduce interference with a user's perception of the image. The projection module is configured to project an image beam to the input coupler, wherein the image beam travels in the waveguide and is then transmitted to the eye through the output coupler. A waveguide module is also provided.

This invention provides a self-heterodyne detection system capable of stably and over long periods of time measuring broadband laser linewidths. [Solution] The present invention discloses a self-heterodyne detection system. The system may include a frequency comb light source that generates light, a photodetector that detects the light, an electrical spectrum analyzer connected to the photodetector that analyzes the frequency and wavelength of the light using the detection signal of the photodetector, an interferometer including an input coupler provided between the frequency comb light source and the photodetector to receive the light, a branch waveguide branched by the input coupler, and an output coupler connected to the branch waveguide, and a programmable filter provided in the branch waveguide to select the peak wavelength of the light.

Embodiments of the present disclosure generally relate to augmented reality systems. More specifically, embodiments described herein provide for augmented reality systems, methods of correcting an image projected into a waveguide, and related components. In one or more embodiments, an augmented reality system includes a light engine configured to emit an image and a waveguide including a substrate. The waveguide further includes an input coupler disposed over the substrate and configured to receive the image from the light engine. An output coupler is disposed over the substrate and configured to emit an outcoupled image. A controller is configured to generate corrective data based on one or more characteristics of the outcoupled image and adjust one or more components of the augmented reality system based on the corrective data.

An angular sensitive time-of-flight position sensor device is provided and includes an array of pixels each comprising: a planar waveguide structure; a collection area with a grating pattern at a specific periodicity to couple incident light into the planar waveguide structure; at least one detector placed outside of the collection area and in a plane different from that of the planar waveguide structure; an output coupler to direct the light from planar waveguide to the at least one detector; a mask to shield the at least one detector from direct illumination; a narrow band light source that illuminates a field-of-view; a first electronics configured to detect the time-of-flight of light retroreflected, scattered, or both incident onto the position sensor and configured to provide distance ranging information; and a second electronics configured to interpret and retain time-of-flight information and configured to communicate with external electronics for system applications.

An electronic device may provide image light to an eye box. The display may include a light source panel that emits the image light. A waveguide may direct the image light towards the eye box. An input coupler may couple the image light into the waveguide and an output coupler may couple the image light out of the waveguide. A color filter may be optically interposed between the light source panel and the output coupler. The color filter may filter the image light using a steep cutoff characteristic. The color filter may allow the image light to exhibit a desired color point while also allowing the light source panel to use light emitters having peak emission wavelengths that maximize the efficiency of the light emitters and thus the power efficiency of the device.

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.

A method of accounting for signal noise in a hybrid laser system is described. The hybrid laser system includes a high reflectivity mirror, a nitrogen-vacancy center diamond, a microwave antenna, a dichroic mirror, a half-vertical cavity surface emitting laser (VCSEL), a birefringent filter, an etalon, an output coupler, and a photodiode. The method includes: measuring a shift in a left-hand side frequency as related to an optically detected magnetic resonance (ODMR) frequency peak of an ODMR signal; measuring a shift in a right-hand side frequency as related to the ODMR frequency peak; normalizing the shift in the left-hand side frequency; normalizing the shift in the right-hand side frequency; and comparing the shift in the left-hand side frequency to the shift in the right-hand side frequency to determine a technical noise associated with the ODMR signal.

Aspects of the present disclosure provide an apparatus for improving performance of an output coupler of a waveguide display panel, such as reducing eye glare. An example waveguide includes an anti-reflective coating. The waveguide further includes a substrate disposed over the anti-reflective coating, wherein the substrate includes a refractive index of from 1.5 to 2.7. The waveguide further comprises a grating layer disposed over the substrate, the grating layer comprising: an output coupler grating, the output coupler grating comprising a refractive index of 2.1 to 2.5; and a coating layer covering the output coupler grating, where the coating layer includes a refractive index of from 1.5 to 1.9.

A waveguide display includes a waveguide, a projector configured to project images (e.g., images to be displayed to a user and / or disparity test images) onto the waveguide, an input coupler configured to couple the images into the waveguide, and one or more output couplers on the waveguide. At least one output coupler of the one or more output couplers is configured to direct the projected images towards the user's eye. At least one output coupler of the one or more output couplers is configured to direct the projected images towards a disparity camera. The waveguide display includes an active dimming layer on the side of the waveguide opposing the user's eye. The active dimming layer is electrically controllable to attenuate ambient light reaching the users eye via the waveguide, based on the effect of the ambient light on the visibility of the projected images measured using the disparity camera.

Active dimming control using parallax camera images is disclosed. A waveguide display includes a waveguide, a projector configured to project images (e.g., images to be displayed to a user and / or parallax test images) onto the waveguide, an input coupler configured to couple the images into the waveguide, and one or more output couplers located on the waveguide. At least one of the one or more output couplers is configured to direct the projected images toward an eye of the user. At least one of the one or more output couplers is configured to direct the projected images toward a parallax camera. The waveguide display includes an active dimming layer on a side of the waveguide opposite the user's eye. The active dimming layer is electrically controllable to attenuate ambient light that passes through the waveguide to the user's eye based on an effect of the ambient light on visibility of the projected images as measured using the parallax camera.

An optical waveguide combiner having an output coupler comprising an array of embedded partially reflective dielectric mirrors expanding and coupling a virtual, optionally color, image generated by a laser display engine into a user EMB, wherein the dielectric mirrors are configured having a wavelength band for each lasing band of the laser display engine that includes wavelengths of light in the lasing band and in a range of wavelengths over which the lasing band is expected to drift, a reflectivity angular range exhibiting a first reflectivity, a transmittance angular range exhibiting a second reflectivity less than the first reflectivity, and a see-thru angular transmittance range having high transmittance for natural light incident on the facets.

This invention discloses a laser polarization rotation state control system, method, apparatus, and storage medium. The system includes: a pump source for providing pump light; a wavelength division multiplexing (WDM) coupler connected to the pump source for coupling the pump light; an erbium-doped gain fiber connected to the WDM coupler for absorbing and amplifying the pump light to obtain signal light; an output coupler connected to the erbium-doped gain fiber for outputting and detecting the signal light; a unidirectional polarization-independent isolator connected to the output coupler for controlling the unidirectional operation of the signal light and maintaining its polarization state; an electrically driven polarization controller connected to the unidirectional polarization-independent isolator for controlling the polarization rotation state of the signal light using a SAC reinforcement learning algorithm; and a saturable absorber carbon nanotube, one end connected to the electrically driven polarization controller and the other end connected to the WDM coupler, for passively mode-locking the signal light for laser output. This invention can improve the detection efficiency of laser polarization rotation state.

An electronic device is provided. The electronic device includes: a transmission circuit; a receiving circuit; a memory to store one or more computer programs; and one or more processors communicatively coupled to the transmitting circuit, the receiving circuit, and the memory, where the transmitting circuit may include: a laser gain circuit for outputting or generating a plurality of lasers having a wide bandwidth under control of the one or more processors; a fixed array distributed Bragg reflector (DBR) grating for outputting a plurality of laser lights having specified wavelengths by changing the wavelengths of the plurality of laser lights; a modulator for modulating a plurality of laser lights having specified wavelengths; a monitoring circuit for identifying whether the plurality of modulated lasers are output according to a specified intensity and a specified wavelength; and an output coupler for outputting the plurality of modulated laser lights to the outside of the electronic device by adjusting output directions and / or output angles of the plurality of modulated laser lights.

A waveguide includes an input coupler, an exit pupil expander comprising a first prism array, an output coupler includes a second prism array, and a seamless transition at an interface between the first prism array and the second prism array. The seamless transition includes at least one prism geometric parameter having a value for each pair of corresponding prisms of the first prism array and the second prism array is matched or varied across the interface.

An adapter for an endoscope system comprises a housing, an input device for receiving image signal inputs from an endoscope, an image signal processor configured to receive image signal inputs and apply an image processing technique to image signal inputs to generate image signal outputs, wherein the image signal processing technique is configured to modify a display characteristic of image signal inputs, and an output coupler for providing image signal outputs to an imaging and control system.A method for converting a flat image into a distorted image includes mapping pixels of the flat image onto a first table that correlates the pixels with positions in the flat image, correlating the positions of the first table with positions in a second table for the distorted image, and generating the distorted image by shifting pixels from the positions of the first table to corresponding positions in the second table.

Embodiments of the present disclosure generally relate to augmented reality systems. More specifically, embodiments described herein provide for augmented reality systems, methods of correcting an image projected into a waveguide, and related components. In one or more embodiments, an augmented reality system includes a light engine configured to emit an image and a waveguide including a substrate. The waveguide further includes an input coupler disposed over the substrate and configured to receive the image from the light engine. An output coupler is disposed over the substrate and configured to emit an outcoupled image. A controller is configured to generate corrective data based on one or more characteristics of the outcoupled image and adjust one or more components of the augmented reality system based on the corrective data.

Aspects of the present disclosure provide an amplifier chip comprising: an optical source configured to generate a plurality of beams, a plurality of output waveguides configured to convey the plurality of beams, a plurality of semiconductor optical amplifiers (SOAs), each of the plurality of SOAs configured to receive a respective beam from the plurality of waveguides and amplify the respective beam, and a plurality of output couplers configured to output the plurality of amplified beams from the amplifier chip. The apparatus further comprises a silicon photonic integrated circuit (SPIC), comprising: a plurality of input couplers, where each of the plurality of input couplers is aligned with a respective output coupler on the amplifier chip so as to receive the plurality of amplified beams, and optical processing circuitry disposed on the SPIC and configured to receive and process one or more of the amplified beams from the plurality of input couplers.

The invention discloses a full-function terahertz logic gate based on multi-dimensional regulation and control and a method thereof, and belongs to the technical field of terahertz communication and on-chip signal processing. The logic gate comprises an input coupler, a first waveguide branch, a function realization waveguide section, a second waveguide branch and an output coupler; and the function realization waveguide section comprises a transmission branch capable of being selectively regulated and controlled by laser and a control waveguide section above which a movable phase shift controller is arranged. Different binary input combinations are simulated through laser irradiation, continuous regulation and control of the signal phase between 0 and pi are achieved by adjusting the distance between the phase shift controller and the control waveguide section, and all seven basic logic functions of AND, OR, NOT, NAND, XOR, NOR and XNOR can be dynamically achieved by combining a preset judgment threshold value of the output end. The structure can be cascaded to form a programmable array to realize complex operations such as a half adder, a full adder and the like. The invention has the advantages of simple structure, function integration, dynamic adjustability and compatibility with CMOS (Complementary Metal Oxide Semiconductor) process, and is suitable for terahertz on-chip communication and intelligent computing systems.

This invention discloses an asymmetric MZ electro-optic modulator, including an input coupler, an output coupler, and a first interference arm and a second interference arm connected in parallel between the output terminal of the input coupler and the input terminal of the output coupler. The first interference arm includes two first arc segments and a second arc segment connecting the two first arc segments. The second interference arm includes two third arc segments and a fourth arc segment connecting the two third arc segments. The opening direction of the second arc segment is opposite to the opening direction of the fourth arc segment. The two ends of the second interference arm are respectively connected to the output terminal of the input coupler and the input terminal of the output coupler through compensation segments. There is a preset target optical path difference between the optical path of the first interference arm and the total optical path of the second interference arm and the compensation segments at both ends. This invention features a compact layout, precisely adjustable optical path difference, and low transmission loss.

Gradient encapsulation of waveguide outcoupler gratings to control diffraction efficiency and directionality.SOLUTION: The device includes a first grating formed over a substrate, the first grating having a plurality of first structures extending away from the substrate, the first grating corresponding to an out-coupler. The device includes a first encapsulant disposed in one or more gaps formed between adjacent first structures, wherein a fill ratio of the first encapsulant decreases along the first grating. A method of manufacturing the device is also described.SELECTED DRAWING: Figure 1B

Embodiments of the present disclosure relate to a device and method relating to an augmented reality waveguide combiner. The device includes a waveguide combiner, the waveguide combiner comprising: an input coupler operable to receive light and incouple light to the waveguide combiner; an output pupil expander (EPE) adjacent to the grid of the input coupler, the EPE having a stepped structure, the stepped structure having at least one band, the at least one band having a plurality of grid structures, and at least one of the plurality of grid structures having a fluctuating depth, fluctuating duty cycle, or fluctuating pitch different from the depth, duty cycle, or pitch of adjacent grid structures among the plurality of grid structures; and an output coupler operable to receive light from the EPE and transmit light over the user's field of view (FOV).

In some implementations, a fiber amplifier system includes a fiber oscillator and a fiber amplifier coupled to an output end of the fiber oscillator. The fiber oscillator may include an active fiber having a first end and a second end, where the active fiber is to receive pump light from one or more optical sources; one or more high-reflectivity mirrors coupled to the first end of the active fiber; and multiple output coupler mirrors coupled to the second end of the active fiber. The one or more high-reflectivity mirrors and the multiple output coupler mirrors may form an optical cavity with the active fiber for generating laser light. The multiple output coupler mirrors may have respective center wavelengths that are different. The multiple output coupler mirrors may have respective reflection spectrums that are different.

The application discloses an electro-optical modulator, a modulation method and a preparation method. The electro-optical modulator comprises a silicon substrate, a silicon dioxide insulating layer, an input waveguide, an input beam splitter, an output coupler, an output waveguide, waveguide arms and a silicon dioxide-graphene composite structure arranged on both sides of the waveguide arms. The waveguide arms are in two groups, and the two groups of waveguide arms are symmetrically arranged. Each group of waveguide arms is composed of a curved segment and a straight segment. The silicon dioxide-graphene composite structure comprises a silicon dioxide modulation arm and a graphene layer. The silicon dioxide modulation arm is symmetrically arranged with the straight segment. The graphene layer is arranged on the top plane of the silicon dioxide modulation arm and the side surface facing the waveguide arm, and forms a three-dimensional coupling structure which is coupled with the evanescent field around the waveguide arm. The electro-optical modulator can realize high-speed and low-loss conversion of electrical signals to optical signals, thereby improving the transmission quality and transmission efficiency of the optical communication system.

A single-mode fiber laser and method for generating bright solitons and dark solitons, the laser comprising: a wavelength division multiplexer connected to a pump source; an erbium-doped fiber connected to one end of the wavelength division multiplexer; a first polarization controller connected to the other end of the erbium-doped fiber; a polarization analyzer connected to an input end of the first polarization controller; a second polarization controller connected to an output end of the polarization analyzer; an output coupler connected to an output end of the second polarization controller, a second output port of the output coupler serving as an output port of the fiber laser; a fiber isolator connected to a first output port of the output coupler; and a band-pass filter connected to an output end of the fiber isolator, the output end of the band-pass filter being connected to the wavelength division multiplexer. The method comprises: using a nonlinear polarization rotation mode-locked technique to make the laser operate in an equivalent saturated absorption region and an equivalent anti-saturated absorption region, respectively, to output bright solitons and dark solitons, respectively. The laser and method can generate bright solitons and dark solitons, respectively.

The present disclosure provides a method including depositing a mirror over a waveguide having an input coupler and an output coupler. An encapsulation layer is deposited over the mirror. A resist is formed over the input coupler, exposing a residual encapsulation portion of the encapsulation layer over a non-input coupler region. The residual encapsulation portion of the encapsulation layer is removed, thereby exposing a residual mirror portion of the mirror over the non-input coupler region. The residual mirror portion of the mirror of the input coupler is removed, thereby exposing the non-input region of the waveguide. The resist over the input coupler is removed, where the waveguide has the mirror only over the input coupler, and the encapsulation layer is only over the mirror.

The present application relates to the technical field of stimulated emission devices, and particularly provides a method and system for self-similar evolution of femtosecond pulses in a chip-level waveguide, the method comprising: introducing input femtosecond pulses into an entrance section of a chip waveguide composed of birefringence heterogeneous materials; obtaining an initial pulse with internal space-time correlation; inputting the initial pulse into a distributed parameter dynamic compensation array in a middle section of the chip waveguide to form synchronous dynamic compensation for nonlinearity and dispersion, and obtaining an intermediate pulse with stable spectral width and phase distribution; inputting the intermediate pulse into an output coupler at an end of the waveguide; simultaneously solidifying a pulse time-domain envelope shape determined by dispersion truncation effect; and outputting femtosecond pulses with self-similar characteristics, stable shape and spectrum after processing by the coupler. The system comprises a space-time correlation processing module, a dynamic compensation synchronization module and a coupling processing module. The present application significantly improves controllability and output quality of femtosecond pulse evolution in an integrated waveguide.

The present disclosure relates to systems implementing a photonic link and methods using a photonic link. Systems, methods, and apparatuses for implementing a photonic link are disclosed. A method includes the steps of: emitting light using an optical transmitter; splitting the light into a first path and a second path using an input coupler, the first path being provided to a modulator and the second path being provided to a phase shifter; and combining an output of the modulator and an output of the phase shifter using an output coupler. The method further includes the steps of: identifying a modulator phase angle that reduces third order distortion at an output end of the output coupler; applying a first bias voltage to the modulator to maintain the identified modulator phase angle; and applying a control signal to the phase shifter to maintain a phase difference between the output of the modulator and the output of the phase shifter.

A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, and an ocular lens coupled to the SLM. The illuminator provides a wide-area illuminating light beam to illuminate the SLM with a spatially homogeneous beam of light. The illuminator may include a slab waveguide with an evanescent out-coupler, or a beam expander based on a diffraction grating with an oblique angle of incidence and a near-normal angle of diffraction of the illuminating light. A low-pass spatial filter may be provided to filter out higher diffraction orders of the illuminating light diffracted on the SLM.