171 results about "Optical propagation" patented technology

Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and / or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holely fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.

Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and / or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.

An optical interconnect architecture provides three dimensional optical interconnects, with the optical interconnects provided along a plane such as a wafer or a substrate. One or more integrated circuits is provided on a second “electronic” plane that is spaced from the optical interconnect plane. Signals from the circuit on the electronic plane are coupled to the optical interconnect plane using various strategies, including metal or optical interlayer interconnects extending perpendicular to the optical plane. Once on the optical interconnect plane, the signals from the circuits on the electronic plane are propagated optically.

An optical time delay apparatus comprises: a multi-wavelength optical source; a diffractive element set imparting a wavelength-dependent delay on signals routed from the source to a 1×N optical switch; and N diffractive element sets routing signals from the 1×N switch to an output port. The optical propagation delay between the source and the output port varies according to the operational state of the source and the 1×N switch. A photodetector may receive the time-delayed signal at the output port.

The invention relates to a video image sharpness processing method in a fog and haze day and a device thereof. The method comprises the following steps: establishing a quantitative model between an atmospheric transmission parameter and an optical propagation medium parameter; obtaining the optical propagation medium parameter of a practical measurement site, and calculating an atmospheric quantitative transmission parameter by utilizing the quantitative model; carrying out downsampling processing to an original image which contains fog and haze to obtain a preprocessing template image, and extracting a dark-channel image; extracting the atmospheric optical value A of the original image I(x) which contains the fog and haze, and initializing a depth-of-field correction factor (Omega); optimizing A and Omega in a transmissivity graph of the I(x); estimating a template transmissivity graph t<model> of a preprocessing image, and carrying out upsampling to obtain a transmissivity graph t(x); and according to the t(x) and the I(x), calculating a sharpness processing result image. A fog and haze image sharpness parameter is subjected to closed loop correction through the quantitative model, an image sampling and multi-scale interpolation method is combined to avoid defects that parameters can not be accurately artificially defined and can not be regulated according to practical environment in a dark channel image defogging process, and a sharpness processing effect is improved.

The invention discloses augmented reality glasses and an implementation method thereof. The augmented reality glasses are characterized in that transparent liquid crystal panels serve as lenses, a user can watch external environments directly through the lenses without delay, the lenses are simple in structure, virtual environment images are directly formed on the lenses without optical projection and effect weakening occurred during optical propagation, and image formation is clear and high in resolution. The augmented reality glasses can be switched between the normal state and the folded state, thereby being convenient to carry. A control component of the augmented reality glasses can be communicated with a public mobile communication base station and equipment with an antenna of the same type, function extension is benefited, and the augmented reality glasses can beneficially be popularized by serving as consumer electronics.

The present invention relates to an optical coupling / splitting device that realizes the splitting of a down-signal and the coupling of up-signals by the same optical device, and reduces coupling losses of the up-signal. An optical coupling / splitting device in the present invention comprises an optical coupling / splitting means for coupling a plurality of up-signals in a multi-mode for output and splitting a down-signal in a single mode for output, and a two-way optical propagation means for propagating the up-signal that is output from the optical coupling / splitting means in a multi-mode for output and propagate the down-signal in a single mode to be output to the optical coupling / splitting means.

We propose a dynamically tunable electro-optic cladding using our proprietary electro-optic material, applied to various circular and planar wave-guides along with specific electrode configuration and excitation electric field format appropriate to that material. Based on the evanescent field coupling phenomena, the proposed device may be used in variable optical attenuators, tunable filters and couplers, etc. Different design of applied electrodes and optical properties of controllable refractive index materials allow polarization dependent or independent, as well as direct or inverse operation regimes of proposed devices.

The present invention relates to a microstructured optical fiber including a photonic band gap-guided core; and at least one index-guided core. Another embodiment of the present invention relates to a microstructured optical fiber including a set of main cores; a microstructured region surrounding the set of main cores; and at least alignment core, the alignment cores having substantially different optical propagation properties than the main cores. The present invention also includes methods for coupling, monitoring, and locating discontinuities in the fibers of the present invention.

Enhancements in optical beam propagation performance can be realized through the utilization of ultra-short pulse laser (USPL) sources for laser transmit platforms, which are can be used throughout the telecommunication network infrastructure fabric. One or more of the described and illustrated features of USPL free space-optical (USPL-FSO) laser communications can be used in improving optical propagation through the atmosphere, for example by mitigating optical attenuation and scintillation effects, thereby enhancing effective system availability as well as link budget considerations, as evidenced through experimental studies and theoretical calculations between USPL and fog related atmospheric events.

A broadband optical switch with high process tolerance designed and fabricated using Planar Lightwave Circuits (PLC) technology. A 2x2 configuration of the switch is based on a Mach-Zehnder interferometer (MZI) configuration that includes two 3 dB adiabatic couplers and two identical arms. Each adiabatic coupler is characterized by two straight branches having different widths, separated over a coupling length by a changing spacing therebetween and blending in a symmetric intersection area, which connect to two symmetric branches. The two adiabatic couplers are connected by the two arms with their symmetric branches facing each other along an optical propagation axis. Switch control is realized by changing an optical property of one or both of the MZI arms. Implementation in silica-on-silicon PLCs provides switches with an exceptional broadband range (1.2-1.7 mum), very high extinction ratios (>34 dB), low fabrication sensitivity and polarization independent operation.

The present invention provides multi-channel protection switching systems and methods for increased reliability and reduced cost. Advantageously, the multi-channel protection switching systems and methods of the present invention use pre-FEC rate measurements, and changes in pre-FEC rate measurements, to detect and avoid potential link failures before they occur. The multi-channel protection switching systems and methods of the present invention also use “wavelength-hopping” and other protection schemes to alleviate wavelength and time-dependent optical propagation impairments. Advantageously, the multi-channel protection switching systems and methods of the present invention switch proactively on diminished, rather than failed, signals; do not require the pre-provisioning of bandwidth through an alternate physical path; allow for switching in either the electrical or optical domain; and incorporate buffering of the data sources involved such that they may be synchronized, thereby providing “hitless” switching between channel sources on the client side.

An optical waveguide element capable of being coupled with optical fibers at high coupling efficiency is to be provided. Also an optical waveguide element manufacturing method permitting accurate production of such optical waveguide elements is to be provided. The optical waveguide element is provided with a buffer layer formed over a monocrystalline substrate and an optical waveguide layer formed over the buffer layer, and a recess is formed in the buffer layer along the lengthwise direction of the monocrystalline substrate. The optical waveguide layer is provided to fit into this recess to form a channel optical waveguide. Over the upper face of the optical waveguide layer on the light incidence side and the light emission side, a cladding layer whose refractive index is smaller than that of the optical waveguide layer and whose thickness increases towards the end face(s) in a flared shape is provided in the same width as that of the monocrystalline substrate. By providing the cladding layer whose refractive index is smaller than that of the optical waveguide layer, it is made possible to expand the mode field diameter and substantially reduce the coupling loss between the optical fiber and the optical waveguide element. Further by increasing the thickness of the cladding layer in a flared shape toward the end face(s), it is made possible to gradually compress the mode field diameter and to reduce the optical propagation loss within the optical waveguide.

An optical fibre is provided having a fibre cladding around a longitudinally extending optical propagation core. The cladding has a reflection region of a varying refractive index in the longitudinal direction.

A thermally assisted recording magnetic head is provided in which a magnetic recording medium can be irradiated with light having a spot size reduced in the submicron order with high total optical propagation efficiency. In a magnetic head, a spot size converter that propagates the light from an optical source in the magnetic head is provided adjacent to a main pole. The spot size converter includes a cover layer having a refractive index lower than that of a clad material and formed in contact with the optical waveguide core, and is formed in a shape composed of a substantially rectangular shape in a light traveling direction and a tapered shape where the width is increased toward the bottom surface of the magnetic head. The optical waveguide core having the cover layer formed is vertically interposed between multi-mode-thin-film-like cores that can excite a first or higher-order optical waveguide mode.

An optical transmission apparatus comprises a preamplifier controlling unit for controlling a preamplifier so that amplified spontaneous emission including all wavelength bands of a wavelength-multiplexed signal beam is outputted toward a wavelength demultiplexing unit, with the wavelength-multiplexed signal beam not inputted, power monitors for monitoring optical powers of the amplified spontaneous emission fed from the preamplifier and wavelength-demultiplexed by the wavelength demultiplexing unit, and a determining unit for determining the continuity state of an optical propagation path of each wavelength component on the basis of a result of monitoring by the power monitors. The optical transmission apparatus allows the continuity test on optical propagation paths of channels including a channel not used at the time of a start of the operation to be made easier than the known techniques.

An optical apparatus is made by mounting segments of a GRIN optical medium on a substrate in at least one groove thereon. The GRIN segments are longitudinally spaced apart from one another on the substrate, and are arranged so that a free-space optical beam received through the distal end face of the first GRIN segment is transmitted through the proximal end face of the first GRIN segment, propagates to the proximal end face of the second GRIN segment, is received through the proximal end face of the second GRIN segment, and is transmitted as a free-space optical beam through the distal end face of the second GRIN segment. The GRIN segments can be formed by division of a single GRIN optical medium mounted on the substrate

The present invention provides a method for designing an optical pulse shaper including a first optical propagation line unit having a nonlinear medium and a dispersion medium concatenated, including: specifying design specifications of the first optical propagation line unit; and based on the design specification, calculating a quasi-periodic stationary pulse of which a waveform of an input optical pulse to the first optical propagation line unit is similar to a waveform of an output pulse from the first optical propagation line unit.

The present invention relates to an optical receptacle which avoids the occurrence of a large impact at the insertion of the terminal member. The optical receptacle comprises a tubular slit sleeve in which a split is made in an axial direction and into which the plug body is introduced from its first end portion, a tubular solid sleeve into which the plug body introduced is inserted from its one end portion and which has an inner diameter which makes substantially no gap with respect to an outer diameter of the plug body, and an optical propagation member which is secured to the other end portion of the solid sleeve and which is optically coupled to the plug body, with a second end portion opposite to the first end portion of the slit sleeve and the one end portion of the solid sleeve being engaged to be connected to each other.

The present invention relates to an optical receptacle which prevents the occurrence of a large impact by collision of a plug body with an optical propagation member. The optical receptacle includes a solid sleeve having a cavity hole into which the plug body is inserted from its one end side and which has an even inner diameter so as not to substantially define a gap with respect to an outer diameter of the plug body and an optical propagation member fixedly secured to the other end side of the cavity hole, with the solid sleeve being formed such that a length from an end portion of the cavity hole on the plug body insertion side to the optical propagation member is longer than a maximum length of extension due to the elastic body of the terminal member.

The invention relates to a method for preparing a GaN substrate with a porous surface and a GaN substrate prepared by using the method. A porous structure is directly prepared on the surface of the GaN substrate by a wet etching method with simple process, low damage and high etching rate. The method for preparing a GaN substrate with a porous surface comprises the following steps of: a, plating a layer of aluminum film on the GaN layer on the surface of the GaN substrate; b, applying voltage in acid solution in an electrochemistry cell, and realizing anodic oxidation by an electrochemistry method so that the aluminum film becomes porous alumina; c, applying voltage continuously to 60-200V, etching the surface of the GaN substrate by the electrochemistry method and forming a porous structure on the surface of the GaN layer; and d, removing oxide on the surface to obtain the GaN substrate with a porous surface. In the invention, a disorder and porous structure on the surface of the GaNsubstrate is designed and prepared so that the optical propagation of the GaN-air interface is randomized, the total reflection of the interface is reduced to the maximum extent, and the light extraction efficiency is greatly improved.

Optical sources presented are comprised of a semiconductor emitter and supporting package system including a hard plastic lens cover and mounting substrate with electrical and mechanical support for the semiconductor. A cavity is formed between the lens cover and substrate which supports addition of materials which cooperate with optical propagation and produce some interaction or effect with respect to the beam. Some versions include dispersants and wavelength shifting materials. In any case, the arrangement and spatial distribution of these materials is not trivial. Both the cavity shape and material placement effect the final output of systems produced here. Well designed filling ports in the substrate permit injection of viscous material such that some preferred spatial distribution is realized. Filling port position may cooperate with separate cavities or may merely encourage natural distribution dictated by flow properties of the materials.

The invention relates to a transparent display panel and a manufacturing method thereof and a display system with an aim to the problem about improving transmittance and display uniformity of a display device. The transparent display panel comprises a transparent substrate and a first electrode layer, a liquid crystal layer, a transmission film layer, an optical waveguide layer and a second electrode layer which are sequentially arranged on the transparent substrate, and at least one light source arranged on the side face of the optical waveguide layer; the transmission film layer includes multiple opening zones partitioning the transmission film layer into multiple independent sub-transmission films; the width of the opening zones are decreased sequentially from locations of the light sources to opposite-side directions of the light sources, and the width of the sub-transmission films are sequentially increased from locations of the light sources to the opposite-side directions of the light sources; refractive index of the sub-transmission films is not less than that of the optical waveguide layer; the refractive index of each of the sub-transmission films, the liquid crystal layer and the transparent substrate is increased sequentially; poor display uniformity caused by optical propagation loss can be reduced, and display uniformity of the display panel is improved.

The invention discloses an image sensor detection device sequentially comprising a light source, an optical attenuator, a first lens group, a second lens group, a diaphragm and an image sensor along an optical propagation direction. Exposure images of the image sensor under different light intensities are obtained by adjusting the transmissivity of the optical attenuator. The invention also discloses an image sensor detection method comprising the following steps of: obtaining the exposure images of the sensor under the different light intensities under the different light intensities; calibrating defective pixels of the sensor according to the obtained exposure images; calibrating bad cluster areas of the sensor according to the definition of bad clusters, and sequencing the bad cluster areas to find the area with a good measuring effect.

According to the invention, these aims are achieved by means of a sensor, suitable for sensing one or more properties of one or more structures, the sensor comprising, a first optical propagation path which is configurable to cooperate with a structure whose properties are to be sensed; a second optical propagation path which is configurable to cooperate with a structure whose properties are to be sensed; a third optical propagation path; a means for amplifying a signal which propagates in the third optical propagation path, so that the signal is amplified before it begins propagation along the second optical propagation path, and a means to prevent the propagation of signals from the second optical propagation path to the third optical propagation path. There is further provided a corresponding method of sensing.

An optical repeating device with a monitoring function comprises first optical propagation means for propagating a lightwave signal through an optical transmission line, second optical propagation means butted against the first optical propagation means, for propagating the lightwave signal, optical branching means provided on a butting face between the first optical propagation means, and the second optical propagation means, and photodetection means. All the means described are assembled into a housing, and integrated therewith. Consequently, it is possible to downsize the optical repeating device with the monitoring function. A large portion of the lightwave signal propagated between the first optical propagation means and the second optical propagation means is allowed to pass through the optical branching means, however, a portion of the lightwave signal is reflected in a given direction by the optical branching means. A lightwave signal reflected is detected by the photodetection means, and is converted into an electric signal. When the electric signal as converted is displayed by, for example, display means, it is possible to check visually whether or not the lightwave signal is transmitted through the optical transmission line.

The present invention provides a method for designing an optical pulse shaper including a first optical propagation line unit having a nonlinear medium and a dispersion medium concatenated, including: specifying design specifications of the first optical propagation line unit; and based on the design specification, calculating a quasi-periodic stationary pulse of which a waveform of an input optical pulse to the first optical propagation line unit is similar to a waveform of an output pulse from the first optical propagation line unit.