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    • 4. 发明授权
    • Method for producing organic crystal and crystal growth cell therefor
    • 生产有机晶体及其晶体生长细胞的方法
    • US5363797A
    • 1994-11-15
    • US879105
    • 1992-05-04
    • Naota UenishiTakafumi UemiyaYo ShimizuAkira MizoguchiYasuji OogakiYasuhiro HattoriShinsuke Umegaki
    • Naota UenishiTakafumi UemiyaYo ShimizuAkira MizoguchiYasuji OogakiYasuhiro HattoriShinsuke Umegaki
    • C30B11/00C30B7/02
    • C30B11/003C30B11/00C30B11/002C30B29/60
    • A method for producing an organic crystal is disclosed. One embodiment comprises maintaining a capillary tube containing a fused liquid of an organic crystal material and having a fused liquid reservoir at one end thereof at a temperature not less than the fusion point of the organic crystal material together with the fused liquid reservoir, reducing the temperature of the fused liquid in the fused liquid reservoir to precipitate seed crystals, and then slowly cooling the capillary tube successively from the end toward the other end to allow a single crystal to grow from the seed crystal in the capillary tube. Because of the large quantity of the fused liquid, a seed crystal can be formed and allowed to grow even from a fused liquid of an organic crystal material which hardly crystallizes in the form of a fused liquid. Another embodiment comprises charging a solution of an organic crystal material in a capillary tube under heat, rapidly reducing the temperature of one end of the capillary tube to precipitate polycrystals, and then slowly cooling the capillary tube successively from the end toward the other end to allow a single crystal to grow from the polycrystal as a seed crystal. A seed crystal grows from a solution of an organic crystal material under control of crystal form to obtain a single crystal which has no inversion symmetry center, is free from lattice defect or rearrangement, and less causative of a laser beam loss.
    • 公开了一种制造有机晶体的方法。 一个实施例包括保持含有有机晶体材料的熔融液体的毛细管,并且在其一端处具有熔融液体储存器,其温度不低于有机晶体材料与熔融液体储存器的熔点,从而降低温度 的熔融液体储存器中的熔融液体以沉淀晶种,然后从端部朝向另一端依次缓慢冷却毛细管,以允许单晶从毛细管中的晶种生长。 由于熔融液体的量大,所以可以形成晶种,甚至可以从熔融液体形式难以结晶的有机晶体材料的熔融液中生长出来。 另一个实施方案包括在加热下将有机晶体材料的溶液装入毛细管中,快速降低毛细管一端的温度以沉淀多晶体,然后从末端向另一端缓慢冷却毛细管,以允许 单晶从多晶生长为晶种。 晶体从晶体形式的有机晶体材料的溶液中生长,得到不具有反转对称中心的单晶,没有晶格缺陷或重排,并且导致激光束损耗的降低。
    • 7. 发明授权
    • Optical transmission line having a core of a non-linear optical material
coated with an improved cladding
    • 具有涂覆有改进的包层的非线性光学材料的芯的光传输线
    • US5214736A
    • 1993-05-25
    • US730481
    • 1991-07-16
    • Takafumi UemiyaNaoto UenishiAkira MizoguchiYasuzi OhgakiYasuhiro Hattori
    • Takafumi UemiyaNaoto UenishiAkira MizoguchiYasuzi OhgakiYasuhiro Hattori
    • G02B6/02G02F1/383
    • G02F1/383G02B6/02
    • A single crystal non-linear optical transmission line is manufactured by using a cladding made of a glass material that eliminates or reduces the formation of an uneven inner wall of an optical fiber cladding made of a glass mother material. The improved glass material suppresses the elution of metal mono-oxides on the inner wall and results in a high yield of non-defective fiber manufacturing. A glass mother material, such as SF1, having a low concentration of lead oxide does not contribute to the elution problem common to higher concentration glass mother materials. A glass mother material having no metal oxides also overcomes the problem of elusion since substitute molecules, such as TaC6, do not elute in water or in acid solutions. These glass materials can be used to successfully form a non-defective core having a low refractive index layer of the inner wall and make possible single mode propagation of a laser light in a single crystal non-linear optical transmission line.
    • 通过使用由玻璃材料制成的包层来制造单晶非线性光传输线,其消除或减少由玻璃母材制成的光纤包层的不均匀内壁的形成。 改进的玻璃材料抑制内壁上金属一氧化物的洗脱,导致无缺陷纤维制造的高产率。 具有低氧化铅浓度的诸如SF1的玻璃母材对于高浓度玻璃母材常见的洗脱问题没有贡献。 没有金属氧化物的玻璃母体也克服了由于诸如TaC6的替代分子不在水中或在酸性溶液中洗脱的问题。 这些玻璃材料可以用于成功地形成具有内壁的低折射率层的无缺陷芯,并且可以在单晶非线性光传输线中实现激光的单模传播。