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1. 发明专利

JP2002196268A WAVEGUIDE TYPE OPTICAL SWITCH AND METHOD OF CONTROLLING SWITCHING TIME 审中-公开
公开(公告)号：JP2002196268A
公开(公告)日：2002-07-12
申请号：JP2001314975
申请日：2001-10-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMOKAWA FUSAO , SAKATA TOMOMI
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide a waveguide type optical switch which is capable of achieving the time for switching of =162 to

2. 发明专利

JP2002090669A METHOD FOR MANUFACTURING LIQUID DRIVE TYPE OPTICAL SWITCH 失效
公开(公告)号：JP2002090669A
公开(公告)日：2002-03-27
申请号：JP2000283789
申请日：2000-09-13
申请人： HITACHI CABLE , NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： TAMURA KENICHI , MURAKAMI KAZUYA , ISHIGAMI YOSHIAKI , MAKIHARA MITSUHIRO , SHIMOKAWA FUSAO , SAKATA TOMOMI , TOKO HIROYOSHI , SATO MAKOTO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid drive type optical switch which has no leakage of a refractive index matching liquid from a groove for optical path switching. SOLUTION: Alloy 15, having higher heat-resisting temperature than the resin used as a sealing member for the refractive index matching liquid 14, is adopted, and resistance to higher temperature (150 deg.C) can be obtained and the refractive index matching liquid 14 will not leak from the groove 5 for optical path switching, so that the liquid crystal drive type optical switch has high reliability.

3. 发明专利

JP2002090668A LIQUID DRIVE TYPE OPTICAL SWITCH 失效
公开(公告)号：JP2002090668A
公开(公告)日：2002-03-27
申请号：JP2000283788
申请日：2000-09-13
申请人： HITACHI CABLE , NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： TAMURA KENICHI , MURAKAMI KAZUYA , ISHIGAMI YOSHIAKI , MAKIHARA MITSUHIRO , SHIMOKAWA FUSAO , SAKATA TOMOMI , TOKO HIROYOSHI , SATO MAKOTO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide a liquid drive type optical switch which is free of variance in the amount of refractive index matching liquid in a groove for optical path switching. SOLUTION: A space 12, which swells in a bump shape, is formed halfway in an injection groove 11. Hence, when resin 13 for sealing is injected from the outside, after a fixed amount of refractive index matching liquid has been injected into the groove 5 for optical path switching, the resin 13 enters to up to the bump-shaped space 12 to seal it, so that the amount of the refractive index matching liquid is prevented from varying.

4. 发明专利

JP2000340866A OPTICAL AMPLIFIER 失效
公开(公告)号：JP2000340866A
公开(公告)日：2000-12-08
申请号：JP14923799
申请日：1999-05-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA TOMOMI , SHIMOKAWA FUSAO
IPC分类号： H01S3/06 , H01S3/20
摘要： PROBLEM TO BE SOLVED: To allow a small-sized optical amplifier to have a high gain by forming a groove within an optical waveguide provided on a substrate and filling the groove with an Ercontaining solution containing an Er compound. SOLUTION: A substrate 11 is provided with an optical waveguide 12, and a groove 13 is formed along the length of the waveguide 12. The groove 13 is sealed with an Er-containing solution 14. The solution 14 contains an index matching solution or an electrolytic solution as a solvent and an Er compound as a solute, and has a refractive index equivalent to that of the waveguide 12. In such an optical amplifier 10, the solution 14 can contain the Er compound as much as to the solubility of the solvent. Therefore, to obtain a gain of 20 dB which is required for a WDM optical system to transmit light through the solution having a high Er concentration, the length of the solutionsealed groove 13 can be only as short as about several centimeters in the amplifier 10. Hence, according to such an optical amplifier, a high gain can be obtained with a small size.

5. 发明专利

JPH09251114A PRODUCTION OF HIGH-POLYMER OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH09251114A
公开(公告)日：1997-09-22
申请号：JP8597796
申请日：1996-03-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA TOMOMI , MARUNO TORU , SASAKI SHIGEKUNI , ISHII TETSUYOSHI , TAMAMURA TOSHIAKI
IPC分类号： G02B6/13 , C08G73/10 , G02B6/12
摘要： PROBLEM TO BE SOLVED: To provide a process for producing an optical waveguide capable of precisely controlling a core thickness without changing an acceleration voltage in producing the high-polymer optical waveguide by using an electron beam plotting method. SOLUTION: A resist layer is formed on the surface of the high-polymer compd. layer to be plotted and the size in the depth direction of the core of the optical waveguide is controlled by adjusting the thickness of this resist layer in the process for producing the high-polymer optical waveguide by direction plotting the core part of the optical waveguide on the high-polymer compd. layer by an electron beam. The resist layer is formed on the surface of the high-polymer compd. layer to the plotted and the size in the depth direction of the core is controlled by adjusting the thickness of this resist layer in the process for producing the high-polymer optical waveguide by irradiating the high-polymer compd. layer with the electron beam via a mask and forming the core part of the optical waveguide. The example of the high-polymer compd. includes polymide contg. fluorine.

6. 发明专利

JPH09251113A HEAT-RESISTANT POLYMER OPTICAL WAVEGUIDE HAVING LARGE DIFFERENCE OF REFRACTIVE INDEX AND ITS PRODUCTION 失效
公开(公告)号：JPH09251113A
公开(公告)日：1997-09-22
申请号：JP8596496
申请日：1996-03-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MATSUURA TORU , MARUNO TORU , KOBAYASHI JUNYA , SAKATA TOMOMI , SASAKI SHIGEKUNI
IPC分类号： G02B6/13 , C08G73/10 , G02B1/04 , G02B6/00 , G02B6/12
摘要： PROBLEM TO BE SOLVED: To obtain a polymer optical waveguide having excellent heat resistance and further large difference in the refractive index between the core and the clad compared to a conventional polymer optical waveguide by using a combination of polyimides which generate specified or more difference in the refractive index between the core and the clad for the core and the clad. SOLUTION: The core and the clad consists of a polymer material, and a combination of polyimides which generate >=3% difference in the refractive index between the core and the clad are used for the core and the clad. The material is preferably a polyimide having a repeating unit expressed by formula. In the production of the optical waveguide, the polyimide having the repeating unit expressed by formula is used for the core material. After a lower clad layer is formed, the core layer of the polyimide is formed by spin coating and hardening. Moreover, when an embedded type optical waveguide is to be produced, the core layer is processed by photolithography and dry etching, and then an upper clad layer is formed on the core.

7. 发明专利

JPH0915608A PRODUCTION OF LOW DOUBLE REFRACTIVE POLYIMIDE FILM 失效
公开(公告)号：JPH0915608A
公开(公告)日：1997-01-17
申请号：JP18765295
申请日：1995-07-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SASAKI SHIGEKUNI , ANDO SHINJI , MATSUURA TORU , MARUNO TORU , KOSHIYOUBU NOBUTAKE , KOBAYASHI JUNYA , SAKATA TOMOMI
IPC分类号： G02F1/1337 , B32B27/34 , C08G73/10 , G02B6/12 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To provide a process for producing low double refractive polyimide film having low dependency on polarization. SOLUTION: The polyimide film formed on a substrate is obtd. by using a polyimide plate as a substrate, applying a polyamide soln. or polyimide soln. uniformly on a substrate surface and subjecting the coating to a heat treatment. The generation process for production is executed by applying the polyamide soln. or polyimide sol. to a uniform thickness by a spin coating method, dipping method, etc., on the polyimide plate. The polyimide plate is then heated for the purpose of evaporation of the solvent. The heating necessary for polyimidization is further executed in the case the polyamide soln. is used. The double fraction is smaller than the polyimide film formed on a silicon substrate or aluminum substrate and the polyimide optical waveguide having the low dependency on polarization is produced if an optical waveguide is produced by using the film.

8. 发明专利

JPH0797382A OCTAETHYLPORPHINATO COMPLEX, ITS PRODUCTION AND METHOD FOR FIXING CARBON DIOXIDE GAS USING THE SAME COMPLEX 失效
公开(公告)号：JPH0797382A
公开(公告)日：1995-04-11
申请号：JP34121593
申请日：1993-12-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA TOMOMI , MARUNO TORU , MATSUMOTO SHIRO , YAMASHITA AKIRA , HAYASHI TAKAYOSHI
IPC分类号： C07D487/22 , B01D53/14 , B01D53/62
摘要： PURPOSE:To obtain a new compound useful as a high-performance carbon dioxide gas fixing material capable of efficiently fixing carbon dioxide gas without requiring addition of a base because of possession of an electron donative group and high electron density. CONSTITUTION:An octaethyl porphinatoaluminum complex of the formula [X is CnH2+1 ((n) is natural number); Et is ethyl]. This compound is obtained by reacting octaethylporphyrin with an alkylaluminum such as triethylaluminum using preferably dichloromethane, chloroform, carbon tetrachloride, etc., as a reaction solvent. The reaction, for example, can be carried out at room temperature under a nitrogen gas flow.

9. 发明专利

JPH0743285A CHEMICAL GAS SENSOR AND MATERIAL THEREOF 失效
公开(公告)号：JPH0743285A
公开(公告)日：1995-02-14
申请号：JP20370693
申请日：1993-07-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA TOMOMI , MARUNO TORU , HAYASHI TAKAYOSHI , NIWA OSAMU , MORITA MASAO
IPC分类号： G01N5/02 , G01N27/12
摘要： PURPOSE:To allow high speed detection of chemical substance with high sensitivity by employing a material containing a crown ether condensed phthalocyanine based compound, represented by a specified formula, as the material of gas sensor. CONSTITUTION:The material of chemical sensor is formed containing a crown ether condensed phthaiocyanine represented by a specified formula (in the formula, M represents 2H, a metal, a metal halide, or a metal oxide, k-n are same or different integer of 0-5). This maternal adsorbs gaseous chemical substance, e.g. NO2 or SO2, quickly and exhibits high saturated adsorption and high sensitivity. Since the film can be made thinner for same sensitivity, high response is realized. A film of this material is formed, as thin as 0.2mum, on a crystal oscillator and a film of about 0.05mum thick is applied onto a microelectrode board thus obtaining a gas sensor.

10. 发明专利

JP2003107374A OPTICAL SWITCH 审中-公开
公开(公告)号：JP2003107374A
公开(公告)日：2003-04-09
申请号：JP2001305968
申请日：2001-10-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOKO HIROYOSHI , MAKIHARA MITSUHIRO , SAKATA TOMOMI , SHIMOKAWA FUSAO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide an optical switch having excellent manufacturability and reliability. SOLUTION: An upper substrate is constituted to contain an alkaline ion compound (such as a lithium oxide) and the content of the alkaline ion compound is specified to 1 to 20%. Or an insulative thin film containing the alkaline ion compound (such as the lithium oxide) is formed on a joint surface of the upper substrate with an optical waveguide substrate or a joint surface of the optical waveguide substrate with the upper substrate and the content of the alkaline ion compound is specified to 1 to 20%. The thickness of the insulative thin film is specified to 0.1 to 10 μm. Also, the conductive thin film is formed on the surface facing the joint surface of the upper substrate with the optical waveguide or on the surface facing the joint surface of the optical waveguide with the upper substrate. Or the conductive thin film is formed on a boundary facing the joint surface of the insulative thin film form on the upper substrate with the optical waveguide substrate or the boundary facing the joint surface of the insulative thin film formed on the optical waveguide substrate with the upper substrate.

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