38results about How to "Low nonlinear coefficient" patented technology

The piezoresistor is fabricated by agglutinating interleaved ZnO porcelain and inner electrode. Main material of the ZnO porcelain is ZnO powder in sub micro of average particle diameter 0.10-0.99 micro. The inner electrode layer is made from palladium and argentine, and palladium is in 3-10% (Wt%) and argentine is in 990-97%. Agglutinating temp is 900-980 deg.C. The invention also discloses method for manufacturing the piezoresistor.

The present invention disclosed a photon crystal fiber that actively filter except for high -order radial mode, including the first air circular hole, high refractive index ring, second air round hole, third air circular hole, third air circular hole, and third air circular hole set from the inside to the outside.The fourth air round hole and optical fiber pack; the first air round hole is located in the center of the cross -section of the fiber; the number of air circular holes, the third air round hole, and the fourth air round hole are the same, and each layer of air hole is the same, and from small to large mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual mutual.Embeds.The present invention supports up to 226 OAM modes at 1.5 μm, and supports 208 OAM modes at 1.55 μm at 1.55 μm, which greatly increases the capacity of the communication system. By increasing the radius of the packet layer, the invention maintains the thickness, Can effectively suppress the high -level radial mode, but also reduce the impact of the purity of the OAM mode; the present invention has the advantages of inhibiting inter -model bruises and low non -linear coefficients. It is suitable for high -capacity OAM mode sub -communication systems.Application value.

The invention discloses a photonic crystal fiber capable of transmitting 22 photon angular momentum modes. The photonic crystal fiber comprises a center fiber core, an annular high refractive index layer and an annular cladding, wherein the fiber core is a large air hole; the annular cladding comprises a cladding I, a cladding II, a cladding III and a cladding IV; the cladding I is composed of 36 square air holes in a circular uniform arrangement manner, and an included angle between every two adjacent square air holes relative to the center of a circle of a cross section of the optical fiber is 10 degrees; the cladding II is composed of 30 circular air holes in a circular uniform arrangement manner, and an included angle between every two adjacent square air holes relative to the center of a circle of the cross section of the optical fiber is 12 degrees; the cladding III is composed of 36 circular air holes in a circular uniform arrangement manner, and an included angle between every two adjacent square air holes relative to the center of a circle of the cross section of the optial fiber is 10 degrees; and the cladding IV is composed of 40 circular air holes in a circular uniform arrangement manner. According to the photonic crystal fiber disclosed by the invention, the quantity of OAM (Orbital Angular Momentum) modes supported by a waveband of 1500-1600nm reaches 22, crosstalk among the various modes is less, confinement loss of most of the modes is low (10<7>dB / m), and the photonic crystal fiber is small in dispersion and low in nonlinear coefficient.

The invention discloses combined In3+ and Ga3+ donor doped ZnO varistor ceramic and a preparation method thereof; the combined In3+ and Ga3+ donor doped ZnO varistor ceramic comprises a base material and a doping material, wherein the base material comprises, by weight, 87-95 parts of ZnO, 2.0-4.0 parts of Bi2O3, 0.4-0.7 part of MnO2, 1.5-3.5 parts of Sb2O3, 0.5-1.5 parts of Co2O3, 0.2-1.0 part of Cr2O3, and 1-5 parts of seed crystal doping material; the seed crystal doping material comprises ZnO, Ga2O3 and In2O3 having a mass ratio of (90-95):(0.1-5):(0.1-5). The combined In3+ and Ga3+ donor doped ZnO varistor ceramic has the advantages that ZnO grain resistivity can be decreased and ZnO lattice distortion can be controlled, and also has the advantages of low finish ZnO varistor residue long ageing life and high pulse current tolerance.

The invention relates to an air-core polarization maintaining photonic crystal optical fiber. Along a circle of the inner wall of a glass tube, a plurality of micro capillaries are arranged to form a pore inner covering layer area, the peripheral part of the pore inner covering layer area and the contact part of the inner wall of the glass tube are fixed on the inner wall of the glass tube in a welding mode, the middle part of the pore inner covering layer area is a low refractive index fiber core I, namely a fiber core area, and the two sides of the fiber core area are low refractive index fiber cores II, namely seven-cell pores; the two sides in the fiber core area are gap areas which are enveloped by symmetrical fiber cores; or the upper side and the lower side in the fiber core area are symmetrically provided with convex areas which are enveloped by two fiber cores; or the two sides in the fiber core area are the gap areas which are enveloped by the fiber cores, and the upper side and the lower side in the fiber core area are symmetrically provided with the convex areas which are enveloped by the two fiber cores. The polarization maintaining performance, low-loss transmission and single-model advantages can be achieved, and the air-core polarization maintaining photonic crystal optical fiber has the advantages of being high in temperature stability, low in non-linear coefficient, low in magnetic field sensitivity, good in irradiation resistance and the like.

The invention provides an open microstructured fiber having a composite fiber core and using shifted single-hole diversion, and the open microstructured fiber provided by the invention comprises a fiber core and a cover layer, wherein the cover layer is compatible with the design of the band-gap cover layer of the traditional total internal reflection type microstructured fiber, and a composite structure and a diversion structure are respectively introduced into the fiber core and the cover layer. The open microstructured fiber provided by the invention is characterized in that an oval diversion hole passing through a band-gap structure at one side is arranged at one side of the axisymmetric line of the surrounded band-gap structure, and a synthetic fiber core consisting of three small round air holes distributed in the shape of an inverted triangle is arranged around the fiber core. The open microstructured fiber provided by the invention has the characteristics of simplicity for manufacturing, easiness for implementation and excellent real-time sensing effectiveness, and can be applied to the real-time sensing of gas-liquid two-phase fluid of fibers and related fields.

The invention discloses In<3+> and Nb<5+> composite donor-doped ZnO voltage-sensitive ceramic and a preparation method thereof. The voltage-sensitive ceramic comprises base materials and doping materials. The base materials contain, by weight, 87-95 parts of ZnO, 2.0-4.0 parts of Bi2O3, 0.4-0.7 part of MnO, 1.5-3.5 parts of Sb2O3, 0.5-1.5 parts of Co2O3, 0.2-1.0 part of Cr2O3, and 1-5 parts of seed crystal doped materials. The seed crystal doped materials include ZnO, Nb2O5 and In2O3, wherein mass ratio of ZnO: Nb2O5: In2O3 is 90-95: 0.1-5: 0.1-5. The In<3+> and Nb<5+> composite donor-doped ZnO voltage-sensitive ceramic has characteristics of reducing ZnO grain resistivity and controlling ZnO lattice distortion to finally achieve low residual voltage of ZnO varistor, long aging life and strong pulse current withstand capacity.