225 results about "Output coupler" patented technology

An optical waveguide system and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a light into the waveguide; and an output coupler, wherein the input coupler includes a right portion and a left portion, wherein the right portion includes stacked first and second polarization volume gratings, the left portion includes stacked third and fourth polarization volume gratings. The first and fourth polarization volume gratings are polarization volume gratings optimized for a right-hand-side field of view of the light, and the third and second polarization volume gratings are polarization volume gratings optimized for a left-hand-side field of view of the light.

A modular ophthalmology device comprising: a first optical device having a light source and an imaging sensor, a first input coupling having an optical interface connection and a physical interface connection for aligning and securing an input optical module, a first optical output, an optical pathway and an output coupling securing a third optical device.

Disclosed herein are pupil expanders for pupil replication in near-eye display systems. In some examples, a pupil expander includes a waveguide and a variable reflectivity transflective mirror, where display light propagating in the waveguide is transmitted through a plurality of regions of the variable reflectivity transflective mirror to form a plurality of replicas of the pupil along one direction. Two such pupil expanders can be used to replicate the pupil in two directions. In some examples, a pupil expander includes a waveguide, an output coupler formed on or in the waveguide, and two or more transflective mirrors in the waveguide and parallel to a surface the waveguide for improving the pupil replication density and light intensity uniformity of the eyebox.

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.

An augmented reality (AR) display system includes a light source and a lens element having a waveguide to direct display light from the light source toward a user's eye. The waveguide includes an incoupler (IC) having surface relief gratings (SRGs) in a first region of the waveguide to incouple the display light and a combined exit pupil expander (EPE) and outcoupler (OC) having surface relief gratings at a second region of the waveguide for exit pupil expansion and surface relief gratings at a third region of the waveguide for outcoupling the display light from the waveguide. The second and third regions at least partially overlap laterally relative to the expected position of the user's eye, with the surface relief gratings of the second region being formed on the same or opposite side of the waveguide as the surface relief gratings of the third region.

An eyewear display device expands a field of view by projecting display light at multiple ranges of input angles to a waveguide (600) employing multiple portions of an incoupler (514) or multiple incouplers (514, 414) corresponding to the different angular ranges of display light to guide light to an exit pupil expander (416) configured to receive the display light from the different angular ranges and an outcoupler (608) that are sized to fit within an eyeglasses lens. The display light that is input from the different angular ranges is guided by the incouplers to be overlapped at an exit pupil expander (or, in some embodiments, at multiple exit pupil expanders that are overlaid with each other) to reduce the total ray footprint at the exit pupil expander.

The invention belongs to the technical field of lasers, and discloses a fiber laser for promoting generation of a stable soliton attraction state by using a high-birefringence fiber. The optical fiber laser comprises a laser pumping source, a wavelength division multiplexer, an erbium-doped gain optical fiber, a polarization independent isolator, a polarization controller, a polarization maintaining optical fiber, an output coupler and a mode locking device based on a carbon nanotube saturable absorber, and all the components are sequentially connected through single-mode optical fibers. The polarization-maintaining optical fiber is a panda-shaped polarization-maintaining optical fiber with a high birefringence effect. The polarization direction and the polarization state in the cavity are accurately controlled by adjusting the polarization controller, phase synchronization of soliton pulses is achieved when the polarization maintaining optical fiber is output, soliton energy in the cavity is rapidly accumulated, soliton splitting is triggered, and finally a stable multi-pulse soliton attraction state is formed. The design is simple and convenient to operate, and stability and anti-interference capability of soliton transmission are remarkably improved.

A waveguide display includes: a waveguide that supports a single grating layer; a data modulation light source; a first input coupler for guiding light of a first spectral band from the source into a first waveguide pupil; a second input coupler for guiding light of a second spectral band from the source into a second waveguide pupil; an output coupler including a multiplexed first grating and a second grating; at least one folding grating for guiding the first spectral band along a first path from the first pupil to the output coupler and providing a first beam expansion; at least one folding grating for guiding the second spectral band along a second path from the second pupil to the output coupler and providing a first beam expansion. The first multiplexed grating guides the first spectral band out of the waveguide in a first direction in which the beam expansion is orthogonal to the first beam expansion. The second multiplexed grating guides the second spectral band out of the waveguide in a first direction in which the beam expansion is orthogonal to the first beam expansion.

The invention discloses a periodic forked near-transformation limit nanosecond pulse mode-locked fiber laser and a generation method. The laser is characterized in that a fiber ring cavity comprises a wavelength division multiplexer, an erbium-doped fiber, a first polarization controller, a polarization analyzer, a dispersion control unit, an output coupler, a fiber isolator and a second polarization controller which are sequentially connected in a closed loop mode. The method comprises the steps that pumping continuous light is coupled into the laser through the wavelength division multiplexer; pumping continuous light is absorbed by using an erbium-doped fiber and is stimulated to radiate a gain pulse with a long wave band, and the generated pulse oscillates in a fiber laser cavity; under the combined action of a first polarization controller, an analyzer and a second polarization controller, an equivalent saturated absorption effect is generated by utilizing nonlinear polarization rotation generated when gain pulses are propagated in an optical fiber, and pulse mode locking is realized; the optical fiber laser works in an abnormal dispersion region, so that generated pulses meet the soliton area theorem, and near-transformation limit pulses are generated. According to the invention, nanosecond pulse period bifurcation output of the short-cavity fiber laser can be realized.

Waveguide modification includes modifying waveguide combiners, output coupler, and pupil expander regions, which contain diffraction gratings, based on user and display characteristics during manufacturing. The diffraction grating is generally configured to combine received display light, representing an image for display, and directs the combined light to a location where the image can be comfortably viewed by the user. Because the desired location for the display can vary based on characteristics of the user, the diffraction grating is modified during manufacturing, such as by covering portions of the grating, to tailor the characteristics of the diffraction grating for a particular user or group of users.

The invention provides a light transmission waveguide structure and device for binocular AR glasses light path detection. The light transmission waveguide structure comprises a cross-shaped substrate, a multi-channel input coupler and an output coupler; the cross-shaped substrate comprises a first waveguide arm and a second waveguide arm which are arranged in a crossed manner; the multi-channel input coupler comprises a first coupling-in grating and a fourth coupling-in grating which are arranged at the two ends of the first waveguide arm respectively, and a second coupling-in grating and a third coupling-in grating which are arranged at the two ends of the second waveguide arm respectively. The first coupling-in grating and the second coupling-in grating are located at the corresponding positions of a left coupling-out area of the left-eye waveguide. The third coupling-in grating and the fourth coupling-in grating are located at corresponding positions of a right coupling-out region of the right-eye waveguide; the output coupler is arranged in a central crossing area of the cross-shaped substrate, a first output vector of the output coupler is collinear with an input vector of the first coupled light and an input vector of the fourth coupled grating, and a second output vector of the output coupler is collinear with an input vector of the second coupled grating and an input vector of the third coupled grating.

The invention provides an all-fiber ultrafast laser based on 1.7 micron high energy. The all-fiber ultrafast laser comprises a pumping source, a wavelength division multiplexer, a gain fiber, a band-pass filter, an output coupler, a single-mode fiber, a first three-ring polarization controller, a polarization dependent isolator and a second three-ring polarization controller. The output end of the pumping source is connected with the wavelength division multiplexer, the output end of the wavelength division multiplexer is connected with the band-pass filter through the gain fiber, the output end of the band-pass filter is connected with the output coupler, and the first output port of the output coupler is connected with the input end of the first three-ring polarization controller through the single-mode fiber. A second output port of the output coupler is used as the output of the all-fiber ultrafast laser, the output end of the first three-ring polarization controller is connected with the polarization dependent isolator, the output end of the polarization dependent isolator is connected with the second three-ring polarization controller, and the output end of the second three-ring polarization controller is connected with the wavelength division multiplexer.

An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

An optical display system has an optical waveguide combiner and one or more cameras. The one or more camera(s) is optically coupled to the optical waveguide combiner and have a field of view of at least one real object and at least one virtual object displayable by the optical display system. The one or more camera(s), which may be for example wafer level waveguide camera(s), may be disposed outside the usable field of view of an output coupler. The one or more camera(s) may be self-calibrated electronically using images captured by the cameras of one or more virtual object(s) displayable by the optical display system. AR / VR / MR registration of devices and / or displayed virtual objects with real objects may be implemented using the images captured by the one or more camera(s) of the displayed virtual objects and real world objects. Real object distance and / or spatial location relative to the optical waveguide combiners may be determined or estimated from the captured images.

Systems and methods to improve efficiency of in-coupling electromagnetic waves, such as in a visible light wavelength range, into a waveguide system arrangement are disclosed. The waveguide system includes: a display or an illumination assembly; a waveguide substrate; a polarization volume grating or a spin-dependent bifacial metasurface as in-coupler, which efficiently couples electromagnetic waves, such as in a visible light wavelength range, into the waveguide substrate. An out-coupler can couple the electromagnetic waves, such as in a visible light wavelength range, out of the waveguide substrate.

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 is an optical device having a long lifetime and high reliability. An optical device according to one embodiment comprises at least one Mach-Zehnder (MZ) modulator and a redundant semiconductor optical amplifier (SOA). The redundant SOA is connected to at least one MZ modulator via a 2-input 2-output coupler. The redundant SOA includes two SOAs arranged in parallel, and the two SOAs are arranged in two waveguides connected to the 2-input 2-output coupler, respectively. The redundant SOA is configured to switch the two SOAs to amplify light modulated by the at least one MZ modulator or light obtained before modulation.

The invention relates to a nanosecond fiber laser and method for high-order chaotic pulses. A fiber ring cavity of the laser comprises a wavelength division multiplexer, an erbium-doped fiber, a first polarization controller, an analyzer, a second polarization controller, an output coupler, a dispersion control unit, a fiber isolator and a band-pass filter which are connected in sequence. The method comprises the steps that pumping continuous light is coupled into the laser through the wavelength division multiplexer; pumping continuous light is absorbed by using an erbium-doped optical fiber and is stimulated to radiate a long-wave-band gain pulse; under the combined action of the first polarization controller, the polarization analyzer and the second polarization controller, an equivalent saturable absorption effect is generated by utilizing nonlinear polarization rotation generated when gain pulses are propagated in an optical fiber, and large anomalous dispersion is introduced to realize generation of nanosecond pulses; through the band-pass filter, nanosecond pulses are allowed to be generated, and meanwhile, the nonlinear increasing speed of propagation and accumulation of the nanosecond pulses in the cavity is controlled, so that order-by-order generation of high-order chaotic pulses is realized. According to the invention, reliable output of high-order chaotic pulses can be realized.

The present invention concerns a viewing apparatus comprising:a first optical line comprising:a projecting system adapted to project a light signal on a first area of the retina of an eye of a wearer of the viewing apparatus,a light signal generator generating the light signal to be projected, anda waveguide comprising an input coupler and an exit coupler, the waveguide being adapted to convey light from the input couple to the exit coupler, and optionally a second optical line comprising an optical system adapted to project a light signal of the environment on a second area of the retina of the eye of the wearer, the optical system comprising a part of the waveguide.

Systems and methods presented herein are operable to control operating parameters within a laser system. In some embodiments, a laser system includes a reflector, a gain medium optically coupled to the reflector and operable to emit laser pulses, and a plurality of laser diodes operable to pump the gain medium with laser diode pulses to stimulate laser pulse emission. The laser system also includes a Q-switch device operable with the reflector to resonate laser light through the gain medium, and an output coupler optically coupled to the Q-switch device and operable to output the laser pulses based on a polarization of the laser light. One or more of the plurality of laser diodes is further operable to control operating parameters of the laser system by inserting one or more diode ghost pulses between laser diode pulses that result in the emitted laser pulses.

An optical waveguide system with angle-multiplexing polarization volume gratings and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a combined image light for a combined image into the waveguide; and an output coupler coupling the combined image light out of the waveguide. The combined image light includes a first image light for a first image and a second image light for a second image, which are combined to form the combined image. The first image light and the second image light have different polarizations. The output coupler includes first and second output polarization volume gratings, which are optimized for different polarizations, respectively, wherein the first output polarization volume grating couples the first image light out of the waveguide, and the second output polarization volume grating couples the second image light out of the waveguide.

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.

A laser assembly (10) includes an emitter array (34) and a lens array (36). The emitter array (34) includes a first emitter (18A) that generates a first emitter beam (20A) along a first emitter axis (44A), and a second emitter (18B) that generates a second emitter beam (20B) along a second emitter axis (44B). The first emitter axis (44A) and the second emitter axis (44B) are spaced apart a first emitter separation distance (42a). The lens array (36) includes a first lens (22A) that colliminates the first emitter beam (20A), and a second lens (22B) that colliminates the second emitter beam (20B). The first lens (22A) has a first lens axis (48A) and the second lens (22B) has a second lens axis (48B). The first lens axis (48A) and the second lens axis (48B) are spaced apart a first lens separation distance (46a) that is different from the first emitter separation distance (42a).

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.

A composite cavity structure for generating multiple vortices relates to the technical field of vortex lasers. To address the problem in the prior art that vortex lasers can only output a single vortex but not multiple vortices, the present application inserts a lens into the cavity and combines it with a plane reflector mirror engraved with a point defect. By adjusting the position of the plane mirror in the branch and the size of the point defect, high-order vortex beams can be effectively generated and the order can be adjusted. Vortex beams of different orders in multiple branches are output through the same output coupler, thereby generating multiple vortex beams.

An electronic device may include a first biasing lens that transmits world light to an output coupler on a waveguide. The output coupler may transmit the world light while coupling image light out of the waveguide. A second biasing lens may transmit the world light and the image light to an eye-fit region. The colored layer may transmit the world light toward the output coupler. The colored layer may be planar and laminated onto a planar surface of the first offset lens or another lens, may be separated from the first offset lens by an air gap, may be non-parallel with respect to the waveguide, and / or may be curved and separated from the first offset lens and the waveguide by an air gap. When planar, the colored layer may be provided with spacers between the substrates or between the colored layer and the waveguide to maximize parallelism.

The waveguide includes an output coupler implemented in the waveguide as a set of reflective facets arranged along a first direction. Each reflective facet is made by applying a reflective coating to a flat face of one or more substrates. Adjacent reflective facets in the set of reflective facets overlap each other along a first direction. For example, a front portion of one reflective facet of the set of reflective facets overlaps a tail portion of a reflective facet adjacent thereto.

A tunable dual-polarization and dual-frequency laser source (1) adapted to emit an output beam (FS) having a first frequency according to a first linear polarization and a second frequency according to a second linear polarization perpendicular to the first linear polarization, the laser source comprising an optical cavity (C) comprising the following elements arranged between a highly reflective element (M1) and an output coupler (M2): a second electro-optical crystal (EO2) in a second material having a second optical axis with the same direction and the same orientation as the second linear polarization and comprising a second pair of electrodes (E2) adapted to apply within the second electro-optical crystal a second voltage according to a direction of the second linear polarization,the first and second materials being adapted so that there are first and second voltages adapted to independently control a value of the first frequency and a value of the second frequency included in the output beam (FS). [Fig.3],

There is presented a system for outputting a plurality of electromagnetic, EM, radiation beams. The system is configured such that at least one of the EM radiation beams interacts with an atom of plurality of atoms of a neutral atom, quantum computer that is not interacted with by a second of the EM radiation beams; or, at least two of the EM radiation beams are for interacting with a respective different atom of a plurality of atoms neutral atom quantum computer. The plurality of atoms is for defining a respective plurality of qubits in a quantum computation performed by the neutral atom quantum computer. The system comprises one or more integrated-optic EM radiation source assemblies for generating at least first and second EM radiation and outputting said EM radiation along respective spatially separate output paths. The system comprises a plurality of integrated-optic EM modulator apparatus. At least a first of the integrated-optic EM modulator apparatus is for receiving the first EM radiation. At least a second of the integrated-optic EM modulator apparatus is for receiving the second EM radiation. The system comprises a plurality of output couplers. Each output coupler is for receiving, along a plane, EM radiation output from at least one of the integrated-optic modulator apparatus. Each output coupler is further for outputting the received EM radiation as an EM radiation beam in a direction either along the same plane or out of the plane.

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.