93results about How to "Achieve phase matching" patented technology

The present invention relates to prism-nonlinear optical crystal couplers for frequency conversion, including M pieces of nonlinear optical crystal and one coupling prism stuck to the incident surface or / and exit surface of the crystal by optical stick or a matching liquid. The coupling prisms are the same triangle prisms of right triangle prism, equilateral triangle prism, or inequlateral triangle prism, or are different triangle prisms. It is hopeful to obtain frequency 6th harmonic output.

A duplexer includes a transmission filter having a ladder circuit configuration and a reception filter. The reception filter includes an input terminal connected to an antenna terminal, a first reception output terminal, and a second reception output terminal. A first filter element and a second filter element, each of which is a longitudinally coupled resonator filter element including a plurality of IDTs, are connected in parallel to the input terminal so that IDTs are connected to the input terminal. The first filter element the second filter element are connected to the first reception output terminal and the second reception output terminal, respectively.

The invention discloses an infrared second-order nonlinear optical crystal material CsHg1.5I4 and a preparation method and application thereof. The crystal space group of the optical crystal material is Cm. The optical crystal material has the advantages of large phase-matchable second-order nonlinear optical coefficients, large light-transmitting widows in a visible region and an infrared region, high thermal stability, simple operation of a synthesis method, short reaction time, moderate experimental conditions and high purity of products; in addition, high-quality and big-size crystals can be produced through a simple method of solvent volatilization; thus the optical crystal material can be widely applied in the optical field.

The invention relates to an inorganic compound Na2Sn(IO3)6 as well as a preparation method and application thereof. The chemical formula of the compound is Na2Sn(IO3)6 and belongs to a hexagonal system, the space group is P63, and the unit cell parameters are shown in the specification, and the unit cell volume is shown in the specification. The colorless acicular Na2Sn(IO3)6 crystal is prepared by using a hydrothermal method. The powder frequency-double effect of the Na2Sn(IO3)6 crystal is 12 times of that of KH2PO4, and the ultraviolet cutoff edge of the Na2Sn(IO3)6 crystal is about 300nm.

The invention provides a device for generation of high-power vacuum ultraviolet laser by direct frequency multiplication and a method thereof. The device comprises a laser pumping source, a direct frequency multiplication device, a vacuum cavity, a power measuring system, a light beam shaping system and a four-dimensional pre-adjusting flat turning table. The laser pumping source is a narrow line-width all-solid-state ultraviolet laser pumping source. The light beam shaping system is arranged between the laser pumping source and the vacuum cavity. The four-dimensional pre-adjusting flat turning table is fixed in the vacuum cavity. The direct frequency multiplication device is fixed on an adapter plate. The method comprises the steps that phase matching under the low-power pumping condition is firstly realized, based on which the angle of the direct frequency multiplication device is pre-adjusted so that phase matching under the high-power condition is realized in advance. High-power hundred milliwatt and watt level vacuum ultraviolet laser output can be realized so that the generated vacuum ultraviolet laser has characteristics of being narrow in line-width, high in frequency multiplication conversion efficiency, high in frequency multiplication output power, stable in output power under high power and practical.

The invention discloses an inorganic crystal compound Rb2BiI5O15 as well as a preparation method of the compound and an application of the compound as a second-order nonlinear optical crystal material. The material has the outstanding characteristics as follows: RbIO4, RbCl, Bi2O3 and H5IO6 are taken as initial reactants for the first time and the material is prepared by adopting a hydrothermal method; a relatively good second-order nonlinear optical effect capable of being subjected to phase matching is obtained; very large light-transmitting windows are formed in a visible light region and a mid-infrared light region; a band gap is relatively large and the thermal stability is relatively good; a synthetic method is easy to operate, high in raw material utilization rate, mild in experimental conditions and high in product purity; the crystal material can be widely applied to the field of optics.

The invention provides nonlinear optical crystal iodic acid germanium lithium as well as a preparation method thereof, and application of the nonlinear optical crystal iodic acid germanium lithium asa nonlinear optical crystal material. The molecular formula of the iodic acid germanium lithium is Li2Ge(IO3)6 and belongs to a hexagonal system and a crystal space group P63. The preparation method comprises the following steps: putting a lithium-containing raw material, GeO2 and HIO3 in a mole ratio of (3-6):1:(8-15) into a hydrothermal reaction kettle, and adding distilled water; sealing the reaction kettle, heating to 220-230 DEG C, performing a constant-temperature sufficient reaction at the temperature, after the reaction is completed, leaving to stand, slowly reducing to the room temperature, performing filtration, washing, and drying, thereby obtaining an inorganic crystal compound Li2Ge(IO3)6. The method is simple to operate and gentle in experiment condition; the prepared iodic acid germanium lithium crystal is excellent in growth property, has very good second-harmonic nonlinear optical effects, is capable of achieving phase matching, has relatively high transparency in visible-near-infrared light zones and medium-infrared light zones, has relatively large band gaps and relatively good thermal stability, and can be used as a nonlinear crystal material which is widely applied to fields such as optics.

The invention relates to an inorganic compound with a non-heart structure, and a preparation method and an application thereof as a nonlinear optical crystal. The crystal has a chemical formula of K2Au(IO3)5, belongs to an orthorhombic crystal system, has a space group of C[mc]2[1], and has crystal cell parameters of a=11.5949(8) angstroms, b=11.6905(6) angstroms, c=11.4716(6) angstroms, alpha=beta=gamma=90 DEG and Z=4. The yellow K2Au(IO3)5 crystal is prepared by a hydrothermal method. The powder frequency-doubling effect of the K2Au(IO3)5 crystal is 1.0 time that of KTiOPO4.

The invention discloses a broadband pump chirp compensation optical parametric amplification method and device. The titanium sapphire laser source produces an initial femtosecond laser that is split into two beams: a stronger beam is used as pump light, a broadband chirp pump light is obtained after the stronger beam passes through a pump light spectrum stretcher and then enters a nonlinear crystal through a delay line and a dichroic mirror; a weaker beam enters a supercontinuum white light generator as a seed light, resulting in broadband chirp seed light and then enters in the nonlinear crystal through the dichroic mirror and then is coupled with the broadband chirp pump light to perform optical parametric amplification. The invention uses broadband chirp pump light with broadened spectrum and comprises more frequency components; the instantaneous frequency correspondence relationship between the broadband chirp pump light and the broadband chirp seed light is precisely regulated sothat the frequency component of the seed light achieves phase matching over a large range, thereby increasing the gain bandwidth of the signal light and realizing the ultra-wideband signal light spectrum output.

The invention provides a chirp laser pulse frequency spectrum shaping system based on angular spectral dispersion, and relates to the technical field of laser pulse amplification. The chirp laser pulse frequency spectrum shaping system based on angular spectral dispersion comprises a chromatic dispersion module, an optical parameter conversion module, an optical delay module and a reflection module. After chirp laser pulse with frequency spectra to be shaped passes the chromatic dispersion module, light with different frequencies is dispersed by the chromatic dispersion module and then entersthe optical parameter conversion module by different incident angles, pump light pulse sequentially passes the optical delay module and the reflection module and then enters the optical parameter conversion module by incident angles non-collinear with the chirp laser pulse, the chirp laser pulse and the pump light pulse are subjected to energy transfer in the optical parameter conversion module and transmitted by the optical parameter conversion module to shape the frequency spectra of the chirp laser pulse, and the technical problems of low use rate of signal light energy, poor relative use flexibility and the like of a chirp laser pulse frequency spectrum shaping system in the prior art are relieved.

The invention discloses a nonlinear optical crystal Rb4Ge3B6O17 and belongs to a nonlinear optical material and synthesis for the nonlinear optical material. The chemical formula of the crystal is Rb4Ge3B6O17, the molecular weight is 896.51, the crystal belongs to a monoclinic system, a space group is Cc, and unit cell parameters are that alpha is equal to 90 degrees, beta is equal to 103.723 (5) degrees, gama is equal to 90 degrees and Z is equal to 4. The crystal is prepared by a high-temperature solid-phase method. The Rb4Ge3B6O17 has excellent nonlinear optical performance, and a second harmonic generation (SHG) coefficient of crystal powder is 1.3 times that of potassium dihydrogen phosphate (KDP).

The invention relates to a europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof. The chemical formula of the crystal material is Eu (IO3) 3.H2O, the molecular weight is 694.68, the material belongs to the monoclinic system, the space group is P21; cell parameters are shown in the specification, alpha=gamma=90 degrees, beta=109.5-110.0 degrees, Z=2, and the cell volume is shown in the specification. Compared with the prior art, the europium iodate monohydrate infrared nonlinear optical crystal material has excellent optical performance;under the irradiation of 1064nm laser, the powder frequency multiplication intensity is about 4.5 times of that of a potassium dihydrogen phosphate crystal, and the laser damage threshold measured under the laser with the wavelength of 1064nm is 43 times of that of a commercialized infrared second-order nonlinear material silver gallium sulfur. In addition, the crystal material has a very wide transmission range in an ultraviolet-visible light-near infrared region (0.3-2.5 microns) and an infrared region (3.2-10.4 microns), and has a wide application prospect in the fields of laser frequencyconversion, photoelectric modulation, laser signal holographic storage and the like.

The invention relates to an inorganic compound Li2Sn(IO3)6 as well as a preparation method and use thereof. The chemical formula of the compound is Li2Sn(IO3)6; the compound belongs to a hexagonal crystal system, the space group is P6<3>, cell parameters are that a and b are equal to 9.4589(4) angstrom respectively, c is equal to 5.1707(4) angstrom, Alpha and Beta are equal to 90 degrees respectively, gamma is equal to 120 degrees, and Z is equal to 1; crystal cell volume V is equal to 400.65(4) cubic angstrom; colorless needlelike Li2Sn(IO3)6 crystal is prepared by using a hydrothermal method. The powder frequency-doubled effect of the Li2Sn(IO3)6 crystal is 15 times of that of KH2PO4, and ultraviolet stopping side is about 304 nanometers.

The invention provides organic-inorganic hybrid strontium potassium tartrate tetrahydrate compound nonlinear optical crystal as well as a preparation method and application thereof. The compound has the molecular formula as follows: KSrC4BO12H10, belonging to the anorthic system and the P1 space group. The compound is prepared with an aqua-solution method, the nonlinear optical effect of the crystal is 1.5 times that of KDP crystal, the ultraviolet visible transmission band capable of realizing phase matching is from 250nm to 900nm, and the ultraviolet cutoff edge is about 230nm. The strontium potassium tartrate tetrahydrate nonlinear optical crystal can be applied to nonlinear optical devices for laser wavelength changing, optical parameters amplification, optical parametric oscillation, and the like.

The invention discloses inorganic non-linear optical crystal sodium iodobismuthate, and preparation and application thereof. The chemical formula of the inorganic matter is NaBi(IO3)4, the molecular weight is 931.57, the inorganic matter belongs to a monoclinic system, the crystal space group is Cc, and the cell parameters are as shown in the description; the compound can be obtained through a hydrothermal synthesis method at the temperature of 210 to 250 DEG C, the operation is simple, and the experiment condition is mild; the crystal of the inorganic compound has a relatively high second-order nonlinear optical effect, and phase matching can be realized; and the compound has relatively high transparency in visible-near-infrared light zones and medium-infrared light zones, has relativelylarge band gaps and relatively high thermal stability, and can be used as a nonlinear optical crystal material which can be widely applied to the fields such as optics.

The invention discloses second-order nonlinear optical crystal material, a molecular formula of the crystal material is NaSb3F10 and a crystal space group is P63. The material is characterized in that a comparatively big second-order nonlinear optical coefficient which is capable of phase-matching is provided; large transmitted windows are provided in an ultraviolet area, a visible light area and an infrared light area; the material has good thermal stability. The synthetic method is that NaF and Sb2O3 with the metage of 2:3 of the molar ratio are added to 40 percent HF acid water solution, which is stirred until the solution is transparent, then the solution is filtered; the filtrate is placed in a thermostatic bath at the temperature of 30-50 DEG C; after 10-30 days, transparent crystal in the shape of hexagonal prism is obtained. The second-order nonlinear optical crystal material has the advantages that the operation is simple; the reaction time is short; the experiment condition is mild; the production purity is high; the crystal with good quality and big size can be generated by a simple solvent volatility method; the crystal material can be extensively applied to optics field and the fields such as dielectric, ferroelectric, pyroelectricity, piezoelectricity, etc.

The invention relates to a centimeter-grade large-dimension hydrated potassium borate non-linear optical crystal, and a preparation method and application. The crystal has a molecular formula of K3B3O10H8 and belongs to an orthorhombic system, the space group is Pna21, the molecular weight is 317.78, the unit cell parameter V is 942.3, and Z is 4. The optical crystal is prepared by adopting a hydro-thermal method. The non-linear optical effect of the non-linear optical crystal provided by the invention is one time of that of potassium dihydrogen phosphate (KDP) crystals, the ultraviolet absorption edge is below 190 nm, the optical crystal has a wide transmission range in ultraviolet and visible light regions, the preparation process has the advantages of low cost, low toxicity, short growing period, stable physical and chemical property and the like, and is simple to operate. The non-linear optical crystal provided by the invention has a wide application in non-linear optical devices such as frequency doubling converters, optical parameter oscillators and the like.

The invention relates to a zirconium fluorine cesium iodate second-order nonlinear optical crystal and preparation and application thereof, the chemical formula of the crystal material is CsZrF4(IO3),the molecular weight is 475.03, the crystal material belongs to an orthorhombic crystal system, the space group is Ima2, the cell parameters are alpha = beta = gamma = 90 degrees and Z = 4, and the cell volume is represented as the specification. Thezirconium fluorine cesium iodate crystal has excellent optical performance: under laser irradiation of 1064 nm, the frequency multiplication intensity of the powder is about 4.5 times of that of a potassium dihydrogen phosphate crystal, and the laser damage threshold of the powder is 6-8 times of that of a commercialized infrared second-order nonlinear material silver gallium sulfur measured by laser with the wavelength of 1064 nm. In addition, the crystal material has a very wide transmission range in an ultraviolet visible light infrared region (0.3-8 microns), and has a wide application prospect in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage and the like.

The invention relates to a nonlinear frequency doubling device, a chiral perovskite material and a preparation method and application thereof. The invention relates to a chiral perovskite material and a preparation method and application thereof. The one-dimensional chiral perovskite material with a new structure is prepared for the first time by selecting R / S-2-methylpiperidine as the chiral organic amine, the lead-based perovskite taking R / S-2-methylpiperidine as the chiral organic amine is provided, and the application limitation caused by inherent defects of the perovskite material is solved. The material has the following characteristics: a huge second harmonic generation signal and a second-order nonlinear property are realized, phase matching and high polarization ratio can be realized, and a wide transparent window is provided in an ultraviolet region, a visible region and an infrared region; the material has the advantages of good laser damage threshold, excellent air stability and good thermal stability, and high-quality large crystals can be prepared by a simple volatilization method; and all properties of all high-quality nonlinear crystals are met, and the application of perovskite in the field of nonlinear optics is a great progress.

A phosphomolybdate has the molecular formula of K4M5P4Mo4HO27, and has the powder frequency-doubling intensity the same as that of KDP; when M is K, the phosphomolybdate is potassium hydrogen phosphomolybdate, the crystal belongs to a tetragonal system, the space group is I-4c2, unit cell parameters comprise a=9.670 angstroms, c=29.335 angstroms, alpha=beta=gamma=90 DEG and Z=4, and the unit cell volume is V=2743.1 cubic angstroms; when M is Rb, the phosphomolybdate is rubidium potassium hydrogen phosphomolybdate, the crystal also belongs to a tetragonal system, the space group is I-4c2, unit cell parameters comprise a=9.768 angstroms, c=29.635 angstroms, alpha=beta=gamma=90 DEG and Z=4, and the unit cell volume is V=2827.7 cubic angstroms; the two crystals are both grown by a fluxing agent spontaneous nucleation method or a fluxing agent top seed crystal method; the two crystals both have the nonlinear optical effect, and are incongruent melting compounds; and the two crystals as nonlinear optical crystals from infrared band to ultraviolet band can be used for preparation of a laser output frequency conversion laser device or used for preparation of a generator for generating a second, third, fourth or fifth harmonic generation harmonic to a laser beam with the wavelength of 1064 nm.

An optical display device (600, 700) is disclosed. A diffractive optical element (618, 718) is mounted on a substrate (611, 711). The diffractive optical element comprises a blazed grating (619, 719)and a remnant layer (617, 717) which is formed of the same polymer-based material as the blazed grating. The remnant layer (617, 717) is positioned adjacent the substrate (611, 711) and a refractive index mismatch is provided between the two. The depth of the remnant layer is selected so that light diffracted by the grating and light reflected by the interface re-combine and interfere constructively for selected angles of incidence in order to undergo thin-film interference.

The invention discloses an optical waveguide structure capable of generating intermediate infrared entangled state photon and a method thereof. Chromic oxide with different dielectric constants is selected as a substrate under different wavelength conditions, a nonlinear organic material serves as a strip waveguide, parameter values of the strip waveguide are determined through effective refractive indexes of different field models formed by the substrate and the strip waveguide under the different wavelength conditions, phase matching is achieved among fundamental modes, a high-order mode andthe conversion among modes are not needed, and the optical waveguide structure is simple; a nonlinear coefficient of a coupling term is effectively improved, and the optical waveguide structure is conductive to effectively generating intermediate infrared entangled three photons.

The invention relates to a fluoro mixed metal salt nonlinear optical crystal material and preparation and application thereof. The chemical formula of the crystal material is Ba(MoO2F)2(XO3)2, and X is Se or Te. Compared with the prior art, the crystal material has excellent nonlinear optical performance, the frequency multiplication intensity of the powder can reach 3-4 times of that of KH2PO4 crystals with the same particle size under 1064nm laser irradiation, and the laser damage threshold measured under laser with the wavelength of 1064nm is 53-60 times of that of a commercialized infraredsecond-order nonlinear material AgGaS2. In addition, the crystal material is excellent in transmission performance in an ultraviolet-visible light region and an infrared region (0.3-10 [mu]m), and has a wide application prospect in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage and the like.

The invention relates to a cerium fluorosulfate second-order nonlinear optical crystal material as well as a preparation method and application thereof. The chemical formula of the crystal material is CeF2(SO4), the molecular weight is 274.18, the crystal material belongs to an orthorhombic system, the space group of the crystal material is Pca21, the cell parameters are alpha=beta=gamma=90 degrees, and Z is equal to 4. The cell volume of the crystal material is compared with that of the prior art, the powder SHG coefficient of the crystal CeF2(SO4) under 1064nm laser irradiation is 8.0 times that of KH2PO4(KDP), and phase matching can be achieved under 1064nm laser irradiation. In addition, the birefringence of the crystal breaks through the birefringence limit of the oxide at the position of 0.361 at 546 nm.

A phosphomolybdate has the molecular formula of K4M5P4Mo4HO27, and has the powder frequency-doubling intensity the same as that of KDP; when M is K, the phosphomolybdate is potassium hydrogen phosphomolybdate, the crystal belongs to a tetragonal system, the space group is I-4c2, unit cell parameters comprise a=9.670 angstroms, c=29.335 angstroms, alpha=beta=gamma=90 DEG and Z=4, and the unit cell volume is V=2743.1 cubic angstroms; when M is Rb, the phosphomolybdate is rubidium potassium hydrogen phosphomolybdate, the crystal also belongs to a tetragonal system, the space group is I-4c2, unit cell parameters comprise a=9.768 angstroms, c=29.635 angstroms, alpha=beta=gamma=90 DEG and Z=4, and the unit cell volume is V=2827.7 cubic angstroms; the two crystals are both grown by a fluxing agent spontaneous nucleation method or a fluxing agent top seed crystal method; the two crystals both have the nonlinear optical effect, and are incongruent melting compounds; and the two crystals as nonlinear optical crystals from infrared band to ultraviolet band can be used for preparation of a laser output frequency conversion laser device or used for preparation of a generator for generating a second, third, fourth or fifth harmonic generation harmonic to a laser beam with the wavelength of 1064 nm.

A duplexer includes a transmission filter having a ladder circuit configuration and a reception filter. The reception filter includes an input terminal connected to an antenna terminal, a first reception output terminal, and a second reception output terminal. A first filter element and a second filter element, each of which is a longitudinally coupled resonator filter element including a plurality of IDTs, are connected in parallel to the input terminal so that IDTs are connected to the input terminal. The first filter element the second filter element are connected to the first reception output terminal and the second reception output terminal, respectively.

The invention relates to a lutetium fluoroselenite frequency doubling crystal as well as preparation and application thereof. The chemical formula of the crystal material is Lu3F (SeO3) 4, the crystalmaterial belongs to a trigonal system, the space group is P63, and the cell parameters are as follows: a = 9.7-9.9 angstroms, b = 9.7-9.9 angstroms, c = 6.9-7.1 angstroms, alpha = beta = 90 degrees,gamma = 120 degrees and Z = 2. Compared with the prior art, the compound Lu3F (SeO3) 4 prepared by the preparation method disclosed by the invention has the advantages that under the irradiation of 1064nm laser, the frequency multiplication intensity of the powder is about 2.5 times that of a KH2PO4 (KDP) crystal, phase matching can be achieved under laser irradiation of the frequency, and the method has a wide application prospect in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage and the like.

The invention provides an inorganic compound, and a preparation method and an application thereof. The inorganic compound has a chemical formula of Li7Te3O9F, belongs to a hexagonal crystal system andspace group P63, and has cell parameters as follows: a is equal to b which is in a range of 11.3 to 11.5 angstroms; c is in a range of 4.7 to 4.9 angstroms; alpha is equal to beta which is 90 degrees; gamma is 120 degrees; and Z is 2. The inorganic compound provided by the invention is prepared through a high-temperature solid phase method, is an ultraviolet-visible nonlinear optical crystal containing a lone pair electron group and a tetrahedron element, shows strong frequency-doubled effect, wide light transmittance range and high thermal stability, and can be used as a nonlinear optical crystal material and applied to the field of laser frequency conversion.

The invention belongs to the technical field of nonlinear optical crystal materials, and discloses a nonlinear optical crystal as well as a preparation method and application thereof. The crystal hasthe following chemical formula: Nb2O3(IO3)2(SO4), the crystal structure of the crystal belongs to a monoclinic system, and the space group of the crystal is C2221. The crystal has excellent second-order nonlinear optical properties and has a wide optical transmission range (0.38-8 [mu]m), the powder frequency doubling strength can be 6 times larger than that of a commercial material KDP, the physical and chemical properties are stable, the thermal weight loss temperature is more than or equal to 580 DEG C, and the optical crystal has an important application value in the high-tech fields suchas laser frequency converters, optical parametric oscillators and the like.