77 results about "Nonlinear optical" patented technology

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.

This invention belongs to the field of quantum dot technology and discloses a method for preparing large-size all-inorganic CsPbI3 perovskite nanosheets. The method includes the following steps: first, large-size PbI2 nanosheets are grown on mica sheets using physical vapor deposition (PVD) with ground PbI2 powder; then, ground CsI powder and the mica substrate with deposited PbI2 nanosheets are placed in a dual-temperature zone tube furnace, and large-size all-inorganic CsPbI3 perovskite nanosheets are synthesized by controlling the system pressure and gas flow rate. The molar ratio of PbI2 to CsI is 1:1. The nanosheets prepared by this invention have controllable size, single-crystal structure, low defects, high phase purity, regular morphology, and excellent stability. The preparation process is simple and easy to operate, and can be directly applied to photodetectors, light-emitting devices, nonlinear optical devices, and other fields.

This application relates to a femtosecond laser multi-degree-of-freedom personalized reshaping method and system for intracorneal implants, belonging to the field of femtosecond laser processing technology. Utilizing the cold processing characteristics of femtosecond lasers, the intracorneal implant is individually cut and ablated to obtain the desired three-dimensional corneal shape, precisely shaping the curvature, thickness, and contour of the lens to perfectly match the patient's corneal capsule or lesion area. By leveraging the nonlinear optical effect induced at the focal point of the femtosecond laser, the stromal collagen network in the weak areas corresponding to corneal expansion can be densified through laser processing, significantly improving the local elastic modulus and resistance to deformation. In areas requiring a smooth transition with the recipient cornea or adjustment of refractive power, controllable micropores or low-density areas can be induced, appropriately reducing local stiffness, thereby achieving a spatial gradient distribution of internal mechanical properties and customizing the overall mechanical behavior and morphological stability after implantation.

This application provides a lightweight imaging probe and imaging device using a superlens, relating to the field of nonlinear optical imaging. By employing a split structure, a miniaturized imaging probe is achieved. During imaging, the imaging probe can be fixedly connected to the object being imaged. Excitation light is used to induce nonlinear optical effects within the object, thereby acquiring optical signals reflecting the internal structure of the object. Specifically, this application ensures that the laser is precisely focused on a specific position within the object corresponding to the scanning angle through a coordinated optical path design of the scanning galvanometer, scanning lens, and objective lens. This effectively triggers nonlinear optical effects while ensuring efficient acquisition of optical signals, thus providing a reliable technical foundation for high-resolution internal imaging. Furthermore, this application uses a superlens structure to construct the objective lens, avoiding the weight and weight associated with traditional optical objectives, thereby achieving a lightweight imaging probe, reducing the impact on the object being imaged, and obtaining more accurate images.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

The application discloses application of a lanthanide metal crystal in preparation of a nonlinear optical device or a birefringent optical device. The lanthanide metal crystal is selected from La4O4Se3, Ce4O4Se3, Pr4O4Se3, Nd4O4Se3 or Sm4O4Se3. In the application, a specific lanthanide metal crystal is used in preparation of a nonlinear optical device, and a nonlinear optical device with sufficient nonlinear optical effect and a long infrared cutoff edge capable of covering an atmospheric transparent window of 8-14 microns is obtained.

The application discloses a nonlinear optical device based on ammonium fluoroborate crystal and a manufacturing method and application thereof, and the manufacturing method comprises the following steps: a, measuring the frequency doubling coefficient of the ammonium fluoroborate crystal; b, determining the effective frequency doubling coefficient formula of the ammonium fluoroborate crystal cut according to the phase matching angle; c, measuring the principal refractive index of the ammonium fluoroborate crystal at multiple wavelengths from deep ultraviolet to infrared, and fitting to obtain a Sellmeier equation; d, obtaining the type I or type II phase matching curve of the ammonium fluoroborate crystal by using the Sellmeier equation in step c, and determining the phase matching point of the ammonium fluoroborate crystal; and e, performing orientation, cutting, polishing of two light transmission surfaces and medium film plating on the ammonium fluoroborate crystal according to the phase matching direction to obtain a prism-free nonlinear optical device of the ammonium fluoroborate crystal. The nonlinear optical device can be obtained without the aid of a prism, and has a relatively high output power.

The application provides a fluorinated guanidinium borate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is [C(NH2)3]B6O9F, the molecular weight is 287.95, the crystal belongs to an orthorhombic system, the space group is Pnma, Pna 21, the cell parameter is a=7.8420(11) Å, b=15.1862(19) Å, c=8.5762(9) Å, α =90°, β =90°, γ =90°, the unit cell volume is 1021.3(2) ų, the crystal is grown by a high-temperature solution method or a flux method, the frequency doubling effect of the crystal is 0.4 times of that of KH2PO4 (KDP), the ultraviolet cutoff edge is 190 nm, the birefringence is large, the birefringence is 0.133 @ 1064 nm, and the deep ultraviolet phase matching capability is deep, the shortest matching wavelength is 196 nm, and the crystal can be applied to deep ultraviolet nonlinear optical crystals in a full solid-state laser.

This invention relates to a nonlinear optical crystal of potassium triacetate dihydrate, its preparation method, and its uses. The molecular formula of the crystal is K3C6O8H. 10 It has a molecular weight of 331.62, belongs to the orthorhombic crystal system, and has a space group of [missing information]. P 212121, cell parameters are a =8.7596(5)Å, b =10.0487(6)Å, c =13.9979(6)Å, α =90.00° β =90.00° gamma =90.00° Z =4, V =1232.13(11)Å 3 Centimeter-sized crystals were grown using an evaporation method and an aqueous solution cooling method. Under 1064nm laser irradiation, the powder frequency doubling effect of this crystal was equivalent to that of KH₂PO₄. 4 (KDP). This crystal has an ultraviolet absorption edge shorter than 200 nm and an experimental birefringence of approximately 0.06 at 546 nm. It is simple to prepare, low in cost, exhibits significant nonlinear optical effects, a large birefringence, a wide transmission range, and is easy to grow and process. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.

This invention discloses an infrared optical frequency conversion element and a converter and laser using the same. It employs a nonlinear optical polycrystalline transparent ceramic. The nonlinear optical polycrystalline transparent ceramic has periodically distributed processed and unprocessed regions along the light transmission direction. The processed and unprocessed regions have different refractive indices, forming a phase grating with a periodically distributed refractive index. The processed regions provide the phase difference between the fundamental frequency light, signal light, and difference frequency light, and these processed regions do not exhibit nonlinear optical effects. This invention enables difference frequency laser output in the infrared band by adding a periodic phase method to the nonlinear optical polycrystalline ceramic to achieve optical frequency conversion.

This invention discloses a high-efficiency nonlinear optical frequency converter based on high-power continuous optical transmission using quartz micro / nano fiber, comprising a wavelength-tunable laser, an optical fiber amplifier, a quartz micro / nano fiber, a sealed cavity, and an optical fiber low-pass filter; the quartz micro / nano fiber includes a first untapered portion, a second untapered portion, a first tapered transition region, a second tapered transition region, and a waist region, transmitting an optical field TE. 01 The mode cutoff method precisely controls the waist diameter of micro / nano fiber and accurately tunes the input light wavelength. The nonlinear light frequency conversion process excited by high-power continuous light transmitted in quartz micro / nano fiber satisfies perfect phase matching. The fundamental mode of the input light and the higher-order mode fields of the harmonic signal light have high overlap in the waveguide mode, which can efficiently generate continuous second and third harmonic signal light. The device has high stability, high efficiency, and low cost, and can be applied in fiber lasers, all-optical signal processing, fiber optic sensing and other fields.

Nonlinear optical chromophore compositions which display lyotropic nematic liquid crystal phases in polar organic solvents and provide a mechanical anisotropic effect allowing for the formation of a non-centrosymmetric chromophore-polymer matrix without the application of an electric field.

This invention discloses potassium borosilicate, potassium borosilicate nonlinear optical crystals, their preparation methods, and applications, belonging to the field of nonlinear optical crystal technology. The chemical formula of potassium borosilicate is K4B6Si3O. 17 With a molecular weight of 577.53, it was prepared using solid-state synthesis or vacuum encapsulation; the chemical formula of this crystal is K4B6Si3O. 17 It has a molecular weight of 577.53, belongs to the monoclinic crystal system, and has a space group of C 2. The unit cell parameters are a =11.8628(13)Å, b =6.6285(6)Å, c =11.0097(19)Å, β =117.183(4)°, unit cell volume is 770.10(17) Å. 3 The powder frequency doubling effect of the crystal is about 1.4 times that of KH2PO4 (KDP), and the ultraviolet absorption edge is shorter than 190 nm. The crystal has good chemical stability and can be used as an ultraviolet and deep ultraviolet nonlinear optical crystal in all-solid-state lasers.

This invention relates to a series of alkali metal rare earth chalcogenides and a series of alkali metal rare earth chalcogenide nonlinear optical crystals, their preparation methods, and their applications. The general chemical formula for both the series of halides and the nonlinear optical crystals is A3Ln. 11 Ga 19 Q 45 X3, where A = K, Rb, Cs; Ln = La, Pr, Nd; Q = S, Se; X = Cl, Br, I, all belong to the hexagonal crystal system with space group and cell parameter Z = 1. This series of halides is synthesized using a high-temperature solid-state method, while this series of nonlinear optical crystals is grown using a high-temperature solution method or the Bridgman process. This material can be used to manufacture second harmonic generators, up- and down-frequency converters, optical parametric oscillators, etc.

This application belongs to the field of saturable absorber technology, and particularly relates to a saturable absorber based on tantalum arsenide quantum dots, its preparation method, and a mode-locked fiber laser. The saturable absorber provided by this application includes a tapered optical fiber and tantalum arsenide quantum dots loaded thereon. The tantalum arsenide quantum dots have excellent nonlinear optical properties and saturation intensity, so when the laser passes through the tantalum arsenide quantum dots on the saturable absorber, the laser reaches saturation quickly, enabling the output of ultrafast laser with a repetition frequency and stable laser mode-locked signal, thereby solving the technical problem of low performance of saturable absorbers based on two-dimensional materials in the prior art.

To provide a vertical resonator optical parametric oscillator. [Solution] In some embodiments, a vertical resonator optical parametric oscillator may be provided. The vertical resonator optical parametric oscillator may include a first mirror layer, a second mirror layer, and a nonlinear optical layer between the first and second mirror layers. The nonlinear optical layer may be configured to resonate both the fundamental harmonic optical signal and the second harmonic optical signal. Each of the first and second mirror layers may have a reflective surface for both the fundamental harmonic optical signal and the second harmonic optical signal to be reflected back and forth within the nonlinear optical layer.

The application belongs to the technical field of optical computing, and discloses a silicon-based integrated all-optical deep neural network chip, a training method thereof and an intelligent device. The chip comprises an input layer, an output layer and a plurality of fully connected layers. Each fully connected layer and the output layer comprise a beam splitter, a microcavity array and a nonlinear gain unit. The beam splitter divides each wavelength signal output by the previous layer into M parts. Different rows of the microcavity array are used to load weights on the different parts of the divided signals. The nonlinear gain unit is used to perform nonlinear optical amplification calculation on each column to generate a regenerated signal. Each fully connected layer uses a wavelength division multiplexing unit to multiplex the regenerated signal onto one waveguide and transmit it to the next layer. The output layer uses a photodetector array to perform photoelectric conversion on the regenerated signal to obtain an inference result. Based on the above structure, multi-layer high-dimensional optical matrix calculation can be realized, the problem of multi-layer cascaded optical energy attenuation can be solved, and the function of a multi-layer cascaded nonlinear activation function can be realized.

The application relates to a compound arsenic-silicon-gallium-strontium and an infrared nonlinear optical crystal of arsenic-silicon-gallium-strontium, a preparation method and application, the compound has a molecular formula of SrGa3Si4As 11 , a molecular weight of 1233.26 g / mol, an asymmetric center, and is crystallized in a hexagonal crystal system P , a 63 space group, a cell parameter of a=b=9.2604(3) A, c=11.6484(5) A, Z=2, and V=865.08(7) A 3 , and is prepared into a crystal by using a high-temperature melt method, a chemical vapor phase transmission method or a flux method. The crystal has strong laser damage resistance, large nonlinear optical effect, wide infrared transmission range, and simultaneously has the advantages of large hardness, good mechanical property, not easy to break and deliquesce, easy to process and store and the like, and can be used for manufacturing infrared nonlinear optical devices.

This invention provides an optical full adder, comprising: a first beam combiner, adapted to receive optical signals through at least two original signal input terminals and superimpose the light intensities of the optical signals; a first nonlinear optical switch, adapted to switch the transmission path of the optical signal output from the first signal output terminal of the first beam combiner according to the intensity of the light signals; a second beam combiner, adapted to superimpose the light intensities of the optical signal input from the upper carry optical signal input terminal and the optical signal input from the weak light end optical signal input terminal; a second nonlinear optical switch, adapted to switch the transmission path of the optical signal output from the output terminal of the second beam combiner according to the intensity of the light signals; and a third beam combiner, adapted to superimpose the optical signals output from the first nonlinear optical switch and the second nonlinear optical switch to obtain the carry output optical signal. This invention also provides a multi-bit binary all-optical adder.

The application discloses a kind of based on semiconductor ring laser two-way chaos synchronization method and system, belong to nonlinear optics and chaos security communication technical field, solve the problem that existing chaos synchronization is high to laser symmetry requirement, vulnerable to parameter disturbance, communication security is insufficient.This method constructs master-slave type semiconductor ring laser SRL chaos synchronization structure, by phase conjugation light feedback drive main laser SRL-1 generates chaos signal, by one-way injection to slave laser SRL-2, optimization injection coefficient, frequency detuning, current matching and feedback phase etc.Parameter realizes two-way chaos synchronization.The synchronization coefficient of the application reaches 0.98 at most, can effectively weaken the influence of frequency detuning and current mismatch, greatly improve the stability and security of chaos security communication, applicable to long distance, high rate two-way chaos security communication system.

The application relates to the field of functional materials, in particular to a lead-free bismuth-based photo-functional crystal material, a preparation method and application. The structural formula of the lead-free bismuth-based photo-functional crystal material is (C6H 14 N)2BiBr5, the space group is P na21 , the cell parameters are as follows: a =12.799+ / -0.001 angstrom, b =22.161+ / -0.002 angstrom, c =7.859+ / -0.001 angstrom, a = b = g =90 degrees, Z =4, V =2229.07+ / -0.05 angstrom 3 . The application first obtains the lead-free bismuth-based photo-functional crystal material (C6H 14 N)2BiBr5 crystal, the crystal has good nonlinear optical performance, the powder frequency doubling strength is about 1.5 times of KDP, the frequency doubling laser output of an Nd:YAG (1064 nm) laser can be realized, the crystal has high thermal stability, and is expected to be applied to an infrared solid laser.

This invention relates to the field of nonlinear optics and discloses a method and system for multi-soliton spectral tunneling based on Airy pulse parameter control. The method includes the following steps: acquiring initial parameter data of the Airy pulse and initial state data of the multi-soliton; performing Airy pulse waveform generation processing based on the initial parameter data of the Airy pulse to generate Airy pulse waveform data; constructing a coupled nonlinear Schrödinger equation for accurate simulation to ensure the predictability of nonlinear interactions; and simultaneously placing the Airy pulse and the multi-soliton in a simulation platform to simulate their interaction. The generated spectral tunneling characteristic data can be analyzed in real time to determine whether the spectral tunneling process deviates from the expected energy transfer trajectory, ensuring spectral energy transfer efficiency and tunneling accuracy, and reducing spectral distortion and efficiency loss.

This invention discloses a laser frequency conversion system and method based on thermal lensing effect enhancement, belonging to the field of laser technology. The system includes a first pump source, a nonlinear frequency conversion crystal, and a second pump source. The crystal is a rare-earth-doped calcium borate crystal, which absorbs the first pump light to generate a controllable thermal lensing effect. The fundamental wave light emitted from the second pump source is coaxially incident on the crystal with the first pump light. The thermal lens focuses the fundamental wave light, significantly increasing its power density within the crystal. The crystal then utilizes a nonlinear optical effect to efficiently convert the high-power-density fundamental wave light into harmonic light output. This invention solves the problem of low efficiency in traditional extracavity frequency doubling. Through an active focusing mechanism, high-efficiency and high-stability visible light laser output can be achieved with only a lower fundamental wave power, making it particularly suitable for biological detection and medical aesthetics.

An optical microscope contains a light source that emits coherent laser light with a wavelength of less than 550 nm; an optical system; and an electronic module. The microscope generates two copies of the laser light, modulates the phase or amplitude of the first copy relative to the second copy, and recombines the first and second copies to form an excitation beam. The microscope focuses the excitation beam onto a position on a material and measures a response beam from the material using an optical detector. The response beam contains transmitted and reflected light from the material. The microscope extracts a response signal from the response beam, which represents a nonlinear optical response of the material and indicates a property of the material. The optical detector is a semiconductor photodiode. The type of semiconductor photodiode is selected based on the photon energy of the laser beam.

Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

A wavelength converter includes: a first multiplexer that combines input signal light with wavelength-conversion excitation light; a second multiplexer that combines the signal light with Raman excitation light; a first nonlinear optical medium that generates wavelength-converted light of the signal light, based on a nonlinear optical effect; and a second nonlinear optical medium that amplifies wavelength-converted light of the signal light output from the first nonlinear optical medium. A wavelength of the Raman excitation light being a wavelength within an amplification band that allows Raman amplification of wavelength-converted light.

This invention relates to a compound strontium borate nitrate and a strontium borate nitrate nonlinear optical crystal, as well as their preparation methods and uses. The chemical formula of the compound is Sr3B9O. 16 (NO3), with a molecular weight of 678.16, was prepared using a vacuum-sealed tube method; the chemical formula of this crystal is Sr3B9O. 16 (NO3), with a molecular weight of 678.16, belongs to the monoclinic crystal system and has a space group of Cc The unit cell parameters are a =11.2574(9)Å, b =6.6400(9)Å, c =18.1027(13)Å, Z=4, V=1348.9(2)Å 3 It is prepared using a high-temperature melt method or hydrothermal method under vacuum sealing conditions. Its nonlinear optical effect is approximately three times that of KDP, and its birefringence is 0.088@546 nm. This method has advantages such as simple preparation, short growth cycle, low toxicity of starting materials, and minimal harm to humans. Sr3B9O obtained by the method described in this invention... 16 (NO3) Nonlinear optical crystals have stable physicochemical properties, large nonlinear effects, and can be applied to phase-matching wavelengths in the ultraviolet band. They can be widely used in nonlinear optical devices such as frequency doubling converters and optical parametric oscillators.

This invention provides a U-band high-energy square-wave pulsed Raman light source module. It first achieves initial stable amplification of the seed light through forward pumping with a 100-watt pump source, followed by high-energy main amplification through reverse pumping with a kilowatt-level pump source. Both stages of Raman amplification utilize highly nonlinear optical fibers as the gain medium to significantly enhance the stimulated Raman scattering effect, efficiently converting pump light energy into signal light and improving overall Raman gain and energy conversion efficiency. Simultaneously, it balances the stability of the amplification process with the integrity of the pulse waveform, thereby achieving a smooth, step-by-step amplification of the U-band pulsed seed light. Ultimately, it stably outputs high-energy U-band square-wave pulsed light with a single pulse energy ≥5μJ and a pulse width of 80–120ns, significantly improving the light source's output performance and better meeting the application requirements of long-distance fiber optic communication expansion and atmospheric methane remote sensing.

This application discloses a fluorinated zirconium phosphate compound, its nonlinear optical crystal, its preparation method, and its applications. The chemical formula of the fluorinated zirconium phosphate compound is Zr(H2PO4)(HPO4)F·nH2O, where 0≤n≤3, and n is an integer. Its nonlinear optical crystal consists of a two-dimensional infinite layered structure formed by [ZrO5F] coordination polyhedra and [HPO4] and [H2PO4] tetrahedra connected by shared oxygen atoms, with interlayer crystal water molecules forming a hydrogen bond network. The nonlinear optical crystal is a non-centrosymmetric crystal; it belongs to the monoclinic crystal system; and its space group is [missing information - likely a specific space group or group]. I 2; The unit cell parameters of a nonlinear optical crystal are a =10.1200(5)Å, b =6.5653(3)Å, c =15.6899(8), β =92.340(5), unit cell volume V =1041.58(9)Å 3 This nonlinear optical crystal possesses deep ultraviolet transparency, a considerable frequency doubling response, and high birefringence, thus meeting the application requirements of nonlinear optical devices. Furthermore, the preparation method has the advantages of simple operation, low cost, low pollution, and low toxicity of the raw materials used.