272 results about "Linear optics" patented technology

The invention belongs to the related technical field of lasers, and provides a high-power subnanosecond-nanosecond laser in order to solve the problems that the range adjustment and the application range of an existing laser are limited, and the structural stability needs to be improved. A modulation semiconductor seed source, an optical fiber pre-amplifier, a light beam isolation system, a high repetition frequency solid pre-amplifier, an acousto-optic modulator frequency reduction module and a multi-stage solid single-pass main amplifier are sequentially arranged along an optical path, continuous adjustable output of repetition frequency and pulse width is achieved, the adjustable range of the repetition frequency is 100 kHz to 1 MHz, the adjustable range of the pulse width is 100 ps to 10 ns, and the adjustable range of the pulse width is 100 ps to 10 ns. The laser power and the light beam quality are remarkably improved, and the method is suitable for the fields of high-precision micromachining, nonlinear optical research, medical cosmetology and the like.

A nonlinear all optical machine learning system (NAOMLS) with nonlinear optical resonator-based continuous wave and / or spiking neurons (NORs) and linear optical components or layers (LOL) learns to implement target tasks after machine learning based direct and / or indirect inverse design and / or optimization of the NORs and / or optimization of the LOL. The inversely designed and / or optimized NORs and the optimized LOL collectively define learnable mapping functions between input lights and output lights of the NAOMLS to meet target objectives for target tasks. In some embodiments, the NORs are indirectly and inversely designed to meet inversely designed objectives in order to be integrated with the NAOMLS so that the NAOMLS can function properly to meet target objectives for target tasks. In some embodiments, the NORs are integrated directly with the NAOMLS and inversely designed and / or optimized with the LOL to directly meet target objectives for target tasks.

The invention relates to a nonlinear optical crystal structure, a preparation method thereof and optical equipment. The nonlinear optical crystal structure comprises a plurality of material layers which are stacked in the direction perpendicular to the two-dimensional plane of the material layers. Each material layer is of a crystal structure with y-weight rotational symmetry and has a predetermined crystal lattice direction in a direction parallel to a two-dimensional plane; a non-zero deflection angle is formed between the adjacent material layers, and the deflection angle is an included angle of the preset crystal lattice directions of the adjacent material layers; wherein y is 1, 2, 3, 4 or 6. According to the nonlinear optical crystal structure and the preparation method thereof, the rotational symmetry crystals are stacked, and nonlinear enhancement of second harmonics and even higher harmonics is achieved by controlling the deflection angle between the material layers. Compared with a traditional nonlinear metasurface scheme, the nonlinear optical crystal structure can achieve higher accuracy, higher operability and higher efficiency.

The invention relates to an optical element desensitization method based on thermal stability of a visual axis of a space optical camera, and relates to the technical field of space optical cameras, and the method comprises the following steps: establishing a visual axis stability optical sensitivity matrix; key optical elements are positioned and optimized; analyzing the surface performance of the optical element; and the visual axis error is calculated through complete machine thermal load simulation analysis. According to the optical element desensitization method based on the thermal stability of the optical axis of the space optical camera, the key optical element influencing the stability of the optical axis of the space optical camera is accurately positioned by establishing the linear optical model, targeted optimization is performed, and the efficiency is improved; an optical element influencing the stability of the visual axis is directly subjected to structural optimization, rigid body displacement constraints are integrated in an optimization model, the sensitivity of the optical element to thermal loads is reduced, and the stability of the visual axis of the whole machine is more effectively guaranteed.

The present invention addresses the problem of providing: a composition and a polymer compound which are each capable of suppressing aggregation of a dye that has a nonlinear optical effect in a nonlinear optical material, and exhibiting a higher electro-optic effect with respect to the absorbance after poling; a nonlinear optical element which is obtained using the composition; and an optical modulator which comprises the nonlinear optical element and operates on the basis of an electro-optic effect. The present invention pertains to a composition which contains a compound represented by formula (1) and a compound represented by formula (3), wherein the content of the compound represented by formula (3) is 0.0001 mol% to 25 mol% inclusive relative to the total content of the compound represented by formula (1) and the compound represented by formula (3).　(Definitions of groups are as set forth in the description.)

The invention provides a linear optical quantum amplifier based on coding in time modes, which comprises a first photon detector and a second photon detector in two time modes, and an input end beam splitter, a first beam splitter, a second beam splitter and an output end beam splitter, the first photon detector is used for detecting photons appearing in a first time window of the upper path, and the second photon detector is used for detecting photons appearing in a second time window of the lower path; the input end beam splitter and the output end beam splitter completely transmit photons emitted in a first time window and completely reflect photons emitted in a second time window at the same time, the first beam splitter completely reflects the photons emitted in the first time window and reflects the photons emitted in the second time window with the reflectivity of gamma, and the second beam splitter completely reflects the photons emitted in the second time window with the reflectivity of gamma. And the first beam splitter completely reflects the incident photons in the first time window and transmits the incident photons in the second time window by a transmission coefficient of 1-gamma, the second beam splitter completely reflects the incident photons in the second time window and reflects the incident photons in the first window by a reflectivity of gamma, and the first beam splitter transmits the incident photons in the first time window by a transmission coefficient of 1-gamma. The method is more concise, easy to operate and better in amplification effect, and a large number of sub-state amplification protocols are achieved.

Methods and systems are provided for performing an encoded n-qubit GHZ measurement on n encoded (logical) qubits using encoded Bell state measurements (E-BSMs). Each E-BSM comprises a plurality of dual-rail Bell state measurements (DR-BSMs) performed on pairs of dual-rail encoded photonic qubits (DR-qubits). Methods and systems for using encoded n-qubit GHZ measurements for fault-tolerant measurement-based quantum computation are also provided.

The invention relates to a light supplement data determination method and device and computer equipment. The method is applied to a photoelectric monitoring system, the photoelectric monitoring system comprises a camera shooting pan-tilt and a light supplementing pan-tilt, the camera shooting pan-tilt and the light supplementing pan-tilt are driven independently, and the method comprises the steps that according to the linear optical relation between the camera shooting pan-tilt and a monitoring target, the camera shooting pan-tilt is controlled to monitor the monitoring target, and calibration camera shooting equipment parameters are obtained; according to each geometric azimuth angle in the calibration camera equipment parameters, controlling the attitude of the light supplement holder to adjust, and obtaining the attitude data of the light supplement equipment; by taking the pose data of the light supplementing equipment as a light supplementing constraint condition, performing light supplementing analysis on the light supplementing holder according to each view field analysis angle in the calibration camera equipment parameters to obtain optical parameters of the light supplementing equipment; and fusing the light supplementing equipment pose data and the light supplementing equipment optical parameters to obtain target camera shooting light supplementing data. By adopting the method, the imaging interference of the monitored target can be effectively reduced, and the monitoring effect is further improved.

The disclosure is related to systems, assemblies, apparatus, and methods relating to a radiation source for generating broadband radiation. The radiation source comprises a photonic crystal surface emitting laser PCSEL configured to output radiation at a first wavelength. The radiation source also comprises a non-linear optical element arranged to receive the radiation output by the PCSEL. The non-linear optical element is configured to convert the first wavelength radiation from the PCSEL into broadband radiation to be output by the radiation source through non-linear effects.

The application provides a nonlinear optical effect generation method, relates to the field of optoelectronic technology, and comprises the following steps: fixing and placing a polar ion crystal as a nonlinear medium, the polar ion crystal being a diatomic crystal or a polyatomic crystal with an optical phonon mode; using a modulated terahertz wave to excite a stimulated phonon polariton in the nonlinear medium, so as to enhance the nonlinear efficiency of signal light incident on the nonlinear medium; and adjusting the polarization angle and the incident angle of the signal light and / or the modulated terahertz wave, so as to generate a nonlinear optical effect. The application is based on the characteristics of the interaction between light and matter modulated by the stimulated phonon polariton, and the nonlinear polarizability is greatly improved by using the stimulated phonon polariton, so that the weak light nonlinear effect of most wavelengths of light can be realized efficiently; and the nonlinear optical effect has the advantages of high refresh rate, wide spectral response, low threshold and low power consumption.

Obtaining corneal measurements for non-contact tonometry. Systems, devices, and methods for determining intraocular pressure (IOP) of an eye are provided. The system may include a pump configured to generate an air puff and a nozzle configured to direct the air puff along a first axis toward the eye. The system may further include a light source distal to the nozzle and oriented to emit a light beam along a second axis transverse to the first axis toward a first linear optical sensor. A first portion of the light beam illuminates an outer surface of the eye, and a second portion of the light beam passes through a front surface of the eye. The system may further include a first linear optical sensor positioned distal to the nozzle and configured to receive the second portion of the light beam.

This application discloses a method and device for fabricating a periodically polarized ultrathin lithium niobate / lithium tantalate device, belonging to the field of nonlinear optical device manufacturing. The method includes: fabricating and polarizing periodic electrodes on a provided ferroelectric crystal wafer to form a periodically polarized master wafer; bonding the master wafer to a carrier substrate using optical resin-assisted bonding or direct bonding to form a composite structure; thinning and polishing the side of the master wafer away from the carrier substrate to obtain an ultrathin periodically polarized crystal functional layer; and fabricating the structure of the ultrathin periodically polarized crystal functional layer to obtain a periodically polarized ultrathin lithium niobate / lithium tantalate device. This method avoids the inherent problems of high-voltage breakdown and poor domain quality in existing technologies when directly polarizing ultrathin crystals by placing the high-risk polarization step on a thick, stable wafer.

The present invention relates to the field of large-field-of-view scenes. Provided is a nonlinear optical large-field-of-view imaging system, comprising a light source system, a laser scanning system and a laser detection system, wherein the light source system is configured to emit laser; the laser scanning system comprises a focusing lens and a galvanometer, wherein the galvanometer is located between the focusing lens and a sample to be detected, the focusing lens is configured to focus the laser on said sample, and the galvanometer vibrates according to a preset scanning angle so as to realize scanning of a laser focus on said sample; and the laser detection system comprises a compound-eye collection structure and a detector, wherein the compound-eye collection structure comprises a plurality of individual lenses which are closely arranged, optical signals generated by said sample are incident on the compound-eye collection structure, and the detector is configured to detect the optical signals collected by the compound-eye collection structure. The present invention can expand a laser scanning imaging range, can ensure that a laser beam always propagates along the optical axis of the focusing lens, and can comprehensively collect signals excited across the entire scanning field of view, thereby improving the efficiency of large-field-of-view imaging and increasing the signal intensity.

A single-material-double-process parametric laser-wavelength converter includes a pump-laser source, a nonlinear optical material, a first optical reflective element, and a second optical reflective element. The pump-laser source is configured to emit a pump-laser pulse light. The nonlinear optical material receives the pump-laser pulse and generates a signal-laser pulse and a partially depleted pump-laser pulse through optical parametric amplification. The first optical reflective element is configured to reflect the signal-laser pulse back to the same nonlinear optical material. The second optical reflective element is configured to reflect the partially depleted pump-laser pulse back to the same nonlinear optical material. With an appropriate adjustment on the reflecting path lengths, the nonlinear optical material is configured to receive the temporally synchronized signal-laser pulse and the partially depleted pump-laser pulse to generate an idler output through difference frequency generation. Both optical parametric amplification and difference frequency generation occur in the same nonlinear optical material.

The invention provides a weak illuminometer calibration system and calibration method. The method specifically comprises the following steps: S1, determining a calibration coefficient of a measurement system; s2, calculating to obtain a corresponding illumination correction factor; and S3, calculating a standard micro-illuminance value of the calibrated illuminometer by combining the display value of the first luminosity detector, the calibration coefficient and the illuminance correction factor under the corresponding aperture, and obtaining a relative indication error of the calibrated illuminometer by comparing a response value Ex of the calibrated illuminometer with the standard micro-illuminance value. Based on a highly-integrated linear optical system, the problems that in a traditional mode, the calibration process is tedious and prone to being interfered by the environment, errors are transmitted step by step, and precision is insufficient due to light intensity attenuation are solved, efficient, high-precision and traceable calibration in a weak illumination interval is achieved, operation is easy and convenient, and cost is low.

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 application relates to a fluorine-containing ferroelectric nematic liquid crystal molecule and application thereof, relates to the technical field of photoelectric materials, and solves the problem of low dielectric constant of traditional liquid crystal materials which restricts the application of the liquid crystal materials in photoelectric functional devices. The molecule adopts a unique non-chiral V-shaped configuration design, takes a benzene ring as a core skeleton, and realizes performance optimization through meta-connection of differentiated functional side chains. In the molecular structure design, a strong electron-withdrawing trifluoromethyl substituent is introduced into the benzene ring 2, 4 of one end of the side chain, the intermolecular interaction force is enhanced, and the long-range order of the material is maintained; the other end adopts an alkoxy flexible chain structure, which not only improves the solubility of the material, but also enhances the thermal stability. The raw material is easy to obtain, the preparation is simple, the fluorine-containing ferroelectric liquid crystal molecule is in a nematic phase, the dielectric constant can be as high as 1.4 x 10 4 (1 kHz), and has a wide ferroelectric nematic phase transition temperature, high polarization intensity and nonlinear optical response, and has important application value in the field of photoelectric functional materials.

This invention relates to a potassium hydroxyborate nonlinear optical crystal, its preparation method, and its applications. The crystal has the chemical formula K₂B₅O₈(OH), a molecular weight of 277.26, belongs to the orthorhombic crystal system, and has a space group of [missing information]. Pca 21, with unit cell parameters a=8.5523(8)Å, b=7.3326(7)Å, c=12.9739(10)Å, α=β=γ=90°, V=813.60(13)Å. 3 A nonlinear optical crystal composed of potassium hydroxyborate can be obtained using a mild hydrothermal (solvothermal) method through programmed or natural cooling. The frequency doubling effect of this crystal powder is approximately twice that of KDP (KH₂PO₄), and its ultraviolet cutoff edge is below 200 nm, making it suitable as a deep-ultraviolet nonlinear optical crystal. The crystal growth process offers advantages such as simple operation, low raw material toxicity, short growth cycle, low cost, and stable physicochemical properties. It has been widely applied in the fabrication of nonlinear optical devices such as frequency doubling generators, up- or down-frequency converters, or optical parametric oscillators.

The present invention relates to a rubidium fluoro-scandium borate compound, a rubidium fluoro-scandium borate nonlinear optical crystal, and a preparation method and application thereof. The rubidium fluoro-scandium borate compound has a chemical formula Rb2ScB3O6F2, does not contain a symmetry center and has a molecular weight of 382.33 g / mol. The rubidium fluoro-scandium borate nonlinear optical crystal belongs to the monoclinic crystal system, and belongs to the non-centrosymmetric space group P21, and the unit cell parameters are: a=4.0372(10) Å, b=11.800(3) Å, c=8.823(2) Å, α=γ=90°, β=98.327(11)°, Z=2. The present invention adopts a high-temperature vacuum packaging method or a solid-state synthesis method to prepare rubidium fluoro-scandium borate compounds. The present invention adopts a fluxing agent method to prepare a rubidium fluoro-scandium borate nonlinear optical crystal, which have the advantages of short absorption cutoff edge, large nonlinear optical effect, good thermal stability, and stable physical and chemical properties. The rubidium fluoro-scandium borate nonlinear optical crystal of the present invention can be used to fabricate nonlinear optical devices, which have important applications in fields such as optics, military, laser lithography, and communication, etc.

A method for fabricating a nonlinear optical waveguide with gradient refractive index distribution, in which a nonlinear optical crystal is prepared; a type of first heavy ions, a type of second heavy ions and parameters related to an irradiation process are determined; the first heavy ions are accelerated to generate a first ion beam; the nonlinear optical crystal is bombarded with the first ion beam to obtain a primary processed crystal; the second heavy ions are accelerated to generate a second ion beam; the primary processed crystal is bombarded with the second ion beam to obtain a secondary processed crystal; and the secondary processed crystal is segmented to obtain the desired optical waveguide.

A graphite-phase carbon nitride composite material covalently modified with a polymethyl methacrylate polymer containing a porphyrin group at its end, and a preparation method thereof, belong to the technical field of nonlinear optical materials. The composite material is characterized by being formed by covalently modifying graphite-phase carbon nitride with polymethyl methacrylate containing a porphyrin group at its end. The preparation method comprises first preparing polymethyl methacrylate containing a porphyrin group at its end by atom transfer radical polymerization, and then covalently linking the polymethyl methacrylate with a graphite-phase carbon nitride covalently modified with benzyl alcohol to prepare a graphite-phase carbon nitride composite material covalently modified with polymethyl methacrylate containing a porphyrin group at its end. The composite material is a nonlinear optical material. This method can produce a composite material with excellent nonlinear optical properties, and the nonlinear optical properties of the composite material can be controlled by varying the polymer of the porphyrin polymer.

Silicone-containing light fixture optics. A method for manufacturing an optical component including an inner optical component and an outer optical component. The method may include providing a first optical component; providing a material that comprises silicone; moving the material through an extrusion die to form a second optical component on the first optical component to form a continuous length of extruded optic. The first optical component can be one of the inner optical component or the outer optical component, and the second optical component can be the other of the inner optical component or the outer optical component and different from the first optical component. The method may further include curing the continuous length of extruded optic; and cutting the continuous length of extruded optic at a desired length to form the linear optic.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores, including (2) compositions / materials / resistive layers comprising NLO chromophores, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores in electro-optic devices (e.g., electro-optic modulators (EOMs)). NLO chromophores disclosed herein not only have large EO effect, but also have fast modulation speed. In addition, NLO chromophores disclosed herein have superior refractive index, photostability and thermal stability compared to other EO Materials. As a consequence, NLO chromophores herein are particularly suited for use as EO materials in connection with low power and small footprint devices, including devices used in data acquisition systems, analog I / O modules, field transmitters, lab and field instrumentation, servo drive control modules, direct current (DC) power supply, alternating current (AC), and / or electronic load.

The application relates to a nonlinear optical glass, comprising a glass matrix and noble metal nanocrystals doped in the glass matrix, wherein the mass fraction of the glass matrix in the nonlinear optical glass is greater than or equal to 40%, and the composition of the glass matrix is xBi2O3-(66-x)P2O5-yZnO-(34-y)Al2O3 in terms of a mole fraction, 1 < x < 21, and 26 < y < 32. The application further provides a preparation method and application of the nonlinear optical glass. The nonlinear optical glass can realize high-concentration doping of noble metal nanocrystals and improve the third-order nonlinear performance of the nonlinear optical glass.

The utility model discloses a metasurface unit structure and a metasurface formed by the metasurface unit structure, and belongs to the technical field of nonlinear optics. The metasurface unit structure comprises a substrate layer and a dielectric layer which are arranged from bottom to top, wherein a convex groove or a concave groove is formed in the dielectric layer. The sections of the substrate layer and the dielectric layer are square, and the sizes are nanoscale; the substrate layer is made of SiO2, and the dielectric layer is made of DAST crystals. The metasurface is formed by periodically arranging a plurality of metasurface unit structures. According to the utility model, the convex or concave grooved structure, the substrate layer with low refractive index, the DAST dielectric layer which has a higher damage threshold and is easy to process and the like are introduced, so that the loss can be reduced, the asymmetry degree can be conveniently adjusted by changing the grooved structure, the quality factor Q can be changed, the local electric field distribution can be optimized, and different application requirements can be met.

A method includes receiving input light having an input wavelength in a first optical resonator for causing resonance of the input light in the first optical resonator. The first optical resonator includes a non-linear optical medium. The method also includes converting at least a portion of the input light to a combination of first output light having a first output wavelength that is different from the input wavelength and second output light having a second output wavelength that is different from the input wavelength and the first output wavelength by passing the input light through the non-linear optical medium. The method further includes causing resonance of the first output light and the second output light in a second optical resonator. A portion of the first optical resonator is coupled to a portion of the second optical resonator.

A length of optical fiber suppresses a nonlinear optical process so as to inhibit energy transfer away from a desired laser wavelength. The fiber has a core and a cladding designed to propagate a laser beam at the desired wavelength, alongside a nonlinear laser component having intensity that escalates as a function of distance due to the nonlinear optical process; a series of spaced-apart filters, each configured with a transmission level to redirect a proportion of the nonlinear laser component from the core into the cladding so as to collectively control exponential growth in the intensity of the nonlinear laser component by imparting resets in the intensity at predetermined intervals along the length; and an output configured to provide the laser beam following its suppressed escalation of the intensity and preservation of energy of the laser beam at the desired wavelength.

A laser assembly and a method for generating continuous-wave (CW) light at approximately 193 nm (between 180 nm and 200 nm) and at a power of 1W or higher using two CW laser sources: one laser source generating first fundamental light that is twice frequency doubled or otherwise converted into first CW light having a first deep-ultraviolet (DUV) wavelength between 250 nm and 275 nm, the other laser source generating second CW light having an infrared (IR) wavelength between 1300 nm and 1700 nm. A resonant cavity receives the second CW light and generates enhanced CW light at 100 W or higher. A first non-linear optical (NLO) crystal mixes a first enhanced CW light portion and the first CW light to generate sum-frequency generation (SFG) light having a second DUV wavelength. A second NLO crystal mixes a second enhanced CW light portion and the SFG light to generate output CW light at approximately 193 nm.

The invention discloses a near-field terahertz nonlinear optical effect excitation detection method and system. A femtosecond laser space-time shaping technology is combined, a strong terahertz pulse is generated based on a femtosecond laser filament, the strong terahertz pulse is coupled with a tapping mode atomic force microscope, and space-time matching of probe vibration and the terahertz pulse is accurately controlled by using a synchronous sampling method, so that the time-space matching of the probe vibration and the terahertz pulse is realized. Mismatch between the low-repetition-frequency strong-field terahertz pulse and the vibration frequency of the near-field microscope probe is overcome, and strong-field terahertz near-field coupling and detection are achieved. The local field enhancement effect of the tip of the nanoprobe can realize nanoscale focusing (peak field intensity reaches MV / cm magnitude) of a terahertz field at a probe-sample gap, the near-field nonlinear interaction is remarkably enhanced, the diffraction limit is broken through, and the nanoscale spatial resolution is realized. According to the method, the excitation detection efficiency and the spatial resolution of the terahertz nonlinear effect are remarkably improved, and accurate excitation, characterization and regulation of the nonlinear optical effect of the sample can be realized.

The application discloses an optical frequency comb automatic recovery device and method, and belongs to the field of silicon-based nonlinear optical photoelectric modulation. The application comprises a laser, an IQ modulator, an acousto-optic modulator, a fiber amplifier, a polarization controller, a micro-ring resonator, a phase-locked loop, an arbitrary waveform generator, a photoelectric detector, a PID module and an upper computer. Transmission loss of an optical frequency comb debugging system is tested, which comprises fiber loss before laser enters a microcavity and transmission loss after the laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the laser frequency is slowly increased and the power is kept unchanged until a single soliton optical frequency comb is observed; when the single soliton disappears, the control steps after the laser wavelength is entered from blue detuning are repeated, and the optical frequency comb is automatically recovered.