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1. 发明公开

EP2230549A4 SEMICONDUCTOR LIGHT MODULATOR AND LIGHT MODULATING DEVICE 有权
标题翻译：半导体光调制器和LICHTMODULATIONANORNUNG
公开(公告)号：EP2230549A4
公开(公告)日：2012-01-04
申请号：EP08869482
申请日：2008-12-26
申请人： NTT ELECTRONICS CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIBASHI TADAO , MARUYAMA KAZUHIRO , KOBAYASHI KENJI , AKEYOSHI TOMOYUKI , KIKUCHI NOBUHIRO , TSUZUKI KEN , ISHIKAWA MITSUTERU
IPC分类号： G02F1/025
CPC分类号： G02F1/025 , G02F2201/07

2. 发明公开

EP2908158A4 OPTICAL CIRCUIT 审中-公开
标题翻译：光路
公开(公告)号：EP2908158A4
公开(公告)日：2016-06-29
申请号：EP13846016
申请日：2013-09-17
申请人： NTT ELECTRONICS CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： TOMITA HIROSHI , KOBAYASHI KENJI , OOBA NAOKI , MIURA TORU
IPC分类号： G02B5/00 , G02B6/12 , G02B6/35 , G02B26/08
CPC分类号： G02B6/3518 , G02B6/3512 , G02B6/356 , G02B26/0833
摘要： Disclosed is an optical circuit including a transparent plate, which is light-transmittable, and a light shielding plate, which is adhered to the transparent plate with an adhesive and has an opening through which incident light passes, and in which the aspect facing to the opening has, on the side opposite to the transparent plate, projections in an overhang shape toward the center of the opening.

3. 发明专利

JP2003192346A ZINC OXIDE, ITS PRODUCTION METHOD, AND TELLURITE GLASS FIBER AND OPTICAL AMPLIFICATION DEVICE USING THE ZINC OXIDE 审中-公开
公开(公告)号：JP2003192346A
公开(公告)日：2003-07-09
申请号：JP2001391388
申请日：2001-12-25
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： KANO KOJI , MORI ATSUSHI , SHIMIZU MAKOTO , KOBAYASHI KENJI
IPC分类号： G02B6/02 , C01G9/02 , C03C13/04 , H01S3/06 , H01S3/10 , H01S3/17 , G02B6/16
摘要： PROBLEM TO BE SOLVED: To provide a method for producing zinc oxide with high purity and a large particle diameter by overcoming a defect in the conventional production thereof such that its purity is low because a starting material is an aqueous solution including much impurities such as zinc salt or zincate, or the particle diameter is very small, e.g. 1 μm or less, and also provide an optical fiber using the zinc oxide and an optical amplification device composed by using the optical fiber. SOLUTION: This zinc oxide production method comprises a process for preparing the precipitate of zinc hydroxide by dissolving a high purity zinc in an acid solution and adding sodium- or potassium-hydroxide thereto, a process for aging and washing the precipitate by heating and cooling in ultrapure water, a process for dewatering and drying the resultant precipitate, and a process for pulverizing the dried material into fine particles. The obtained zinc oxide is dehydrated, highly pure and forms a bar-like crystal having the particle size of 1 μm or larger. The optical fiber using such zinc oxide and the optical amplification device using the optical fiber have high amplification. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2002274817A METHOD OF PREPARING OF HIGH-PURITY SODIUM TELLURITE 失效
公开(公告)号：JP2002274817A
公开(公告)日：2002-09-25
申请号：JP2001084150
申请日：2001-03-23
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： KANO KOJI , MORI ATSUSHI , KANAMORI TERUHISA , SHIMIZU MAKOTO , KOBAYASHI KENJI
IPC分类号： G02B6/00 , C01B19/00
摘要： PROBLEM TO BE SOLVED: To provide a method of rapidly preparing high-purity sodium tellurite without generating impurities by a simple process step. SOLUTION: This method has a process step of dissolving tellurium dioxide into an aqueous sodium hydroxide solution or sodium hydrogencarbonate and an equal molar amount of a sodium carbonate solution in such a manner that the amount of a sodium element attains a twice molar amount with respect to the amount of a tellurium element, a process step of depositing sodium tellurite hydrate by heating the dissolved aqueous solution, a process step of heating and drying the deposited substance and a process step of fining the heated and dried substance by pulverizing.

5. 发明专利

JPH11147703A PRODUCTION OF HIGH-PURITY TELLURILIM DIOXIDE 失效
公开(公告)号：JPH11147703A
公开(公告)日：1999-06-02
申请号：JP31046597
申请日：1997-11-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KENJI , KANO KOJI , MORI ATSUSHI , OISHI YASUTAKE
IPC分类号： C01B19/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing high-purity tellurium dioxide, having excellent safety and mass production property without depending on the shape of a starting substance and having high yield of tellurium dioxide. SOLUTION: This method for producing high-purity tellurium dioxide comprises a step for dissolving metal tellurium into diluted nitric acid, a step for heating the dissolved aqueous solution and depositing tellurium dioxide hydrate, a step for carrying out dehydration treatment of the deposited substance and a step for carrying out drying treatment of the dehydrated substance. The purity of metal tellurium is preferably >=6N and in the diluted nitric acid, the ratio of concentrated nitric acid to ultrapure water is preferably within the range of (3:1) to (1:1).

6. 发明专利

JPH10287402A PRODUCTION OF METAL FLUORIDE 失效
公开(公告)号：JPH10287402A
公开(公告)日：1998-10-27
申请号：JP10082097
申请日：1997-04-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KENJI , NISHIDA YOSHITAKE , KANAMORI TERUHISA
IPC分类号： C01B9/08 , C01F17/00 , C01G25/04 , C01G27/04
摘要： PROBLEM TO BE SOLVED: To obtain an anhydrous metal fluoride of a high purity, suppressed in oxide generated by a heat treatment at a high temperature, and having an extremely low concentration of transition metals, by dissolving a metal in a hydrofluoric acid solution containing a oxidizing agent while heating, then cooling to obtain a metal fluoride precipitate and performing the dehydration and drying. SOLUTION: This method for producing an anhydrous metal fluoride or a metal fluoride containing hydrated metal fluoride, is to add a metal consisting of Zr, Hf or La having a 6-7 nine purity in a hydrofluoric acid solution containing an oxidizing agent such as hydrogen peroxide water, nitric acid and a perchloric acid salt, heating the solution for dissolving the metal, cooling to obtain a metal fluoride precipitate, dehydrating and then vacuum drying. Especially ZnF2 , ZrF4 , HfF4 , LaF3 , YF3 and CdF2 are extremely easily prepared as the anhydrous metal fluoride as compared with the conventional method of dehydrating and drying by HF gas at a temp. of 300-600 deg.C to form the metal fluoride.

7. 发明专利

JPH09124317A PRODUCTION OF LEAD FLUORIDE 失效
公开(公告)号：JPH09124317A
公开(公告)日：1997-05-13
申请号：JP30329195
申请日：1995-10-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KENJI
IPC分类号： C01G21/16 , H01S3/06 , H01S3/17
摘要： PROBLEM TO BE SOLVED: To provide a method for producing highly pure lead fluoride, solved in the defects of conventional technologies by removing transition metal impurities and oxygen impurities. SOLUTION: The method for producing lead fluoride comprises a water dissolution process for dissolving a water-soluble lead salt in water to produce an aqueous solution, a pH-controlling process for controlling the pH of the aqueous solution to approximately 4, an impurity-extracting process for adding oxine and chloroform to the aqueous solution, an organic phase-removing process for removing an organic phase generated in the impurity-extracting process, a precipitation process for adding a fluorinating agent to the aqueous solution left after the organic phase-removing process, a dehydration process for dehydrating the precipitates generated in the precipitation process, and a drying process for drying the precipitates with at least one of hydrogen fluoride gas and fluorine gas.

8. 发明专利

JPH0692606A PRODUCTION OF MULTICOMPONENT HIGH-PURITY METAL FLUORIDE 失效
公开(公告)号：JPH0692606A
公开(公告)日：1994-04-05
申请号：JP24045992
申请日：1992-09-09
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KENJI
IPC分类号： C01B9/08 , C03C3/32 , C03C13/04
摘要： PURPOSE:To obtain the subject fluoride suitable as a raw material for ultra-low- loss optical fibers by wet purification of a multicomponent metal-contg. aqueous solution followed by producing a precipitate using a fluorinating agent and then dehydrating and drying the precipitate. CONSTITUTION:A metal M-contg. aqueous solution is incorporated with an organic reagent capable of forming the most stable complex for the transition metals (e.g. chromium, iron, cobalt, nickel, copper) existing in this aqueous solution and a solvent. Thereby, such transition metal impurities are extracted in the solvent and eliminated. Then, a fluoride precipitant is added to the remaining aqueous solution to produce a precipitate, which is then dehydrated and dried, thus obtaining the objective multicomponent high-purity metal fluoride containing (1) Zr, Ba, La, Y, Al, Li and Na or (2) Mg, Ca, Sr, Ba, Al, Er and La.

9. 发明专利

JPH0445480B2 失效
公开(公告)号：JPH0445480B2
公开(公告)日：1992-07-24
申请号：JP23024484
申请日：1984-11-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KANO KOJI , KOBAYASHI KENJI
IPC分类号： G01N23/221 , C30B29/42 , G01N31/00

10. 发明专利

JPH04134044A METAL COMPLEX FOR THIN FILM FORMATION 失效
公开(公告)号：JPH04134044A
公开(公告)日：1992-05-07
申请号：JP25453490
申请日：1990-09-25
申请人： TOYO STAUFFER CHEM CO , NIPPON TELEGRAPH & TELEPHONE
发明人： OKAZAKI TAKASHI , TOKUTOME KOICHI , KOBAYASHI KENJI
IPC分类号： C07C49/92 , C07F3/00 , C23C16/18
摘要： NEW MATERIAL:A metal complex for thin film formation consisting of hydrate of alkaline earth metal complex using beta-diketone compound as a ligand and characterized by being a fibrous crystal and being >=90% in thermal weight decrease by thermobalance. EXAMPLE:Bis-1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octadionate barium. USE:A metal complex for thin film formation consisting of (beta-diketone complex of alkali earth metal, used in vapor phase deposition method and characterized by forming a fibrous crystal. PREPARATION:For example, 8 hydrates of barium hydroxide is dissolved in deaired water and barium carbonate is filtered and 1,1,1,2,2,3,3-heptafluoro-7,7- dimethyl-4,6-octadione is added to the filtrate and the mixture is dropwise added to an aqueous solution of alcohol to react both components and a crystal is deposited by diluting the reaction mixture with the alcohol to provide the objective metal complex.

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