92results about How to "Achieve phase matching" patented technology

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 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 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.

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.

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.

The invention relates to a rubidium molybdenum fluoride tellurite second-order nonlinear optical crystal material and preparation thereof, and application of rubidium molybdenum fluorine tellurite second-order nonlinear optical crystal material in laser frequency conversion. The chemical formula of the crystal material is RbTeMo2O8F; the molecular weight of the crystal material is 551.95; the crystal material belongs to a monoclinic system; the space group of the crystal material is Pn; the cell parameters of the crystal material are that a is equal to 5.55 to 5.73 angstroms, b is equal to 9.18 to 9.30 angstroms,c is equal to 7.44 to 7.57 angstroms, alpha is equal to gamma and equal to 90 degrees, beta is equal to 95.13 to 95.32, and Z is equal to 2; and the cell volume V of the crystal material is equal to 379.1 to 403.4 angstroms<3>.The rubidium molybdenum fluoride tellurite crystal material has excellent optical performance; under irradiation of laser with a wavelength of 1064 nm, the powder frequency doubling strength of the rubidium molybdenum fluoride tellurite crystal material is about 27 times the powder frequency doubling strength of a monopotassium phosphate crystal; and under laser with a wavelength of 2100 nm, the powder frequency doubling strength of the rubidium molybdenum fluoride tellurite crystal material is 2.2 times the powder frequency doubling strength of a potassium titanyl phosphate crystal. In addition, the crystal material has a wide transmission range in a visible light-infrared light region (0.34-5.4 [mu]m), and has wide application prospects in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage and the like.