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1. 发明专利

JP2010224155A DISPERSION COMPENSATOR 审中-公开
公开(公告)号：JP2010224155A
公开(公告)日：2010-10-07
申请号：JP2009070520
申请日：2009-03-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MINO SHINJI , TAKAHASHI HIROSHI , OBA NAOKI , ISHII MOTOHAYA , SENOO KAZUNORI , WATANABE TOSHIO , ONO HIROTAKA
IPC分类号： G02F1/061 , G02F1/13 , H04B10/2507 , H04B10/2513
摘要： PROBLEM TO BE SOLVED: To solve the problems that the size of one side of a spatial phase modulation element becomes larger in accordance with channel increase, however, the size increase of the spatial phase modulation element is not preferable from the viewpoint of mass productivity and manufacturing costs, and when a variable dispersion compensator is constituted by using the spatial phase modulation element, light transmission falls off in an optical frequency (wavelength) corresponding to an edge of an FSR of an AWG, with respect to a variable dispersion compensator which performs dispersion compensation independently of each channel using the spatial phase modulation element. SOLUTION: The multichannel variable dispersion compensator is constituted by combining a plurality of variable dispersion compensators (TODC) using the spatial phase modulation element whose size in the direction corresponding to a spectacle axis of the AWG is suppressed as short. In a communication system using a group branching filter, the FSR is set so as to satisfy predetermined relation with all bandwidths of a WDM communication channel group to be covered by a TODC block to flatten optical transmission characteristics. COPYRIGHT: (C)2011,JPO&INPIT

2. 发明专利

JP2001350051A OPTICAL WAVEGUIDE MODULE AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001350051A
公开(公告)日：2001-12-21
申请号：JP2000169175
申请日：2000-06-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KURIHARA TAKASHI , HIKITA MAKOTO , KATO YUJIRO , TOYODA SEIJI , OBA NAOKI , HAYASHIDA SHOICHI , TOMARU AKIRA , MARUNO TORU
IPC分类号： G02B6/30 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide module, having various superior optical characteristics, and a technique capable of easily manufacturing the optical waveguide module at a low cost. SOLUTION: This method for manufacturing the optical waveguide module, which is formed by connecting a light-inputting and outputting optical fiber to an optical waveguide is provided with a process for working an optical fiber inserting V groove to a substrate, a process for coating a high polymer film stripping thin film onto the V-groove area of the V-grooved substrate, an optical waveguide layer manufacturing process for manufacturing an embedding- type high polymer optical waveguide in a prescribed position on the V-grooved substrate, a process for cutting a part of the optical waveguide and the substrate in the thickness direction at a prescribed position of the substrate, a process for immersing the high polymer optical waveguide together with the V-grooved substrate into a prescribed solution and stripping only high polymer stuck onto the V-groove region from the substrate, a process for preliminarily working both connecting surfaces, so as to have a tilt between both optical axes and the surface normal of the connecting surface, when inserting the optical fiber into the re-exposed V-groove part and optically connecting to the high polymer optical waveguide without aligning, and a process for firmly fixing the optical fiber to the V-grooved substrate or the high polymer optical waveguide, using an optical adhesive.

3. 发明专利

JP2000250077A ARRAY OPTICAL WAVEGUIDE OPTICAL SWITCH 失效
公开(公告)号：JP2000250077A
公开(公告)日：2000-09-14
申请号：JP5321699
申请日：1999-03-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA NAOKI , KANEKO AKEMASA , WATANABE TOSHIO , KURIHARA TAKASHI , MATSUNAGA TORU
IPC分类号： G02F1/313
摘要： PROBLEM TO BE SOLVED: To provide a small-sized array optical waveguide optical switch. SOLUTION: This array optical waveguide optical switch is provided with a first slab optical waveguide 14 connecting a channel optical waveguide 11 for common port to the channel optical waveguide array 12 for phase shifter, a second slab optical waveguide 15 connecting the channel optical waveguide 13 for branch port to the channel optical waveguide array 12 for phase shifter and the phase shifter (first heater heating area 16, second heater heating area 17) consisting of a part of the channel optical waveguide array 12 for phase shifter. An optical path length from one of the channel optical waveguide 11 for common port to one point on the end surface of the second slab optical waveguide 15 in the channel optical waveguide 13 for branch port side is fixed regardless of the optical waveguide constituting the channel optical waveguide array 12 for phase shifter before the phase shifter is driven. The phase shifter is provided with the shape successively imparting a fixed optical path length difference for the thing adjacent to the optical waveguide constituting the channel optical waveguide array 12 for phase shifter.

4. 发明专利

JP2000249993A ARRAY OPTICAL WAVEGUIDE THERMOOPTICAL PHASE SHIFTER, ARRAY OPTICAL WAVEGUIDE GRATING WAVELENGTH VARIABLE FILTER AND ARRAY OPTICAL WAVEGUIDE OPTICAL SWITCH 失效
公开(公告)号：JP2000249993A
公开(公告)日：2000-09-14
申请号：JP5321499
申请日：1999-03-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA NAOKI , TOYODA SEIJI , KURIHARA TAKASHI , MATSUNAGA TORU , HIKITA MAKOTO
IPC分类号： G02B6/12 , G02F1/01 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To provide a wavelength variable filter and a 1×N optical switch of low cross talk by constituting an array optical waveguide thermooptical phase shifter of plural array optical waveguides and thin film heaters provided on the array optical waveguides and arranging the array optical waveguides at an equal interval. SOLUTION: The array optical waveguide thermooptical phase shifter 11 consists of plural array optical waveguides and the thin film heaters 12 provided on the array optical waveguides. Two pieces of thin film heaters 12 are connected parallel to a heater heating source E1, and are arranged left/right symmetrically around a center. Further, the thin film heaters 12 are changed in their lengths by a difference ΔLh/2 each of a heater length on two adjacent array optical waveguides at every optical waveguide. Further, by arranging the array optical waveguides at the equal interval, an effect of the thermal diffusion from the adjacent heaters is equalized also in respective array optical waveguides. Thus, an arithmetic progression like optical path length difference is imparted precisely to the array optical waveguide.

5. 发明专利

JP2000241781A POLYMER THERMO-OPTIC OPTICAL WAVEGUIDE DEVICE 失效
公开(公告)号：JP2000241781A
公开(公告)日：2000-09-08
申请号：JP3947699
申请日：1999-02-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA NAOKI , HIKITA MAKOTO , TOYODA SEIJI , KURIHARA TAKASHI
IPC分类号： G02F1/313 , G02F1/01 , G02F1/065
摘要： PROBLEM TO BE SOLVED: To obtain a device equipped with a thin film heater which has good compatibility with a polymer optical waveguide, which is not oxidized, which is free from cracks even if the film is thick, which does not have temp. dependence of the resistance, and which can be controlled in a film thickness region with good controlling property, and which gives high production yield by forming a palladium-gold alloy film for the thin film heater. SOLUTION: The polymer optical waveguide device consists of a substrate, a polymer waveguide having a core part and a clad part surrounding the core on the substrate, and thin film heaters 12, 13 disposed on the upper part of the polymer waveguide. By heating the thin film heaters 12, 13 of the polymer optical waveguide device, the refractive index in a part near the core is changed to control the light which is transmitted through the core. In this polymer optical waveguide device, a palladium-gold alloy (Pd-Au) film is used as the heaters to control the refractive index, and a protective film made of a resist material is used.

6. 发明专利

JP2000241774A TUNABLE OPTICAL ATTENUATOR AND OPTICAL SWITCH 失效
公开(公告)号：JP2000241774A
公开(公告)日：2000-09-08
申请号：JP3984799
申请日：1999-02-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA NAOKI , KURIHARA TAKASHI
IPC分类号： G02F1/01 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To obtain a small-sized tunable optical attenuator having a simple configuration and a large tunable attenuation amt. and to obtain a small-size optical switch having a simple configuration and small cross talk. SOLUTION: A heater 14 and a heat radiating substrate 15 are disposed respectively on the upper and lower faces of an optical waveguide 13 consisting of a core 11 and a clad 12 so that heat-induced core region having a higher refractive index than the surrounding region in a part of the clad 12 by the temp. gradient and the thermo-optical effect caused between the heater 14 and the heat radiating substrate 15. Thereby, the conducting mode in the core 11 of the optical waveguide is optically coupled with the radiating mode in the heat-induced core region so as to attenuate the propagating light in the core 11 of the optical waveguide.

7. 发明专利

JP2000098160A PHOTODETECTOR 失效
公开(公告)号：JP2000098160A
公开(公告)日：2000-04-07
申请号：JP27343998
申请日：1998-09-28
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ADVANCED TECH KK
发明人： HIKITA MAKOTO , OBA NAOKI , TOMARU AKIRA , IMAMURA SABURO , ENBUTSU KOUJI , TABEI HISAO
IPC分类号： G02B6/122 , H04B10/11 , H04B10/112 , H04B10/10 , H04B10/105 , H04B10/22
摘要： PROBLEM TO BE SOLVED: To surely detect a signal. SOLUTION: A photodiode 15 is connected to an optical fiber by providing a cladding part 13 with a main signal detecting optical waveguide core part 11 consisting of one single mode waveguide and position detecting optical waveguide core parts 12 constituted of four multi-mode waveguides, positioning the main signal detecting waveguide core part 11 at the center part of the area where the core part of a light-incident end face 16 is positioned, positioning the position detecting optical waveguide core parts 12 so that they surround the main signal detecting waveguide core part 11, arranging the main signal detecting waveguide core part 11 apart from the position detecting optical waveguide core parts 12 at the light exit end face, and connecting optical fiber 14 provided with connectors to the main signal detecting waveguide core part 11 and the position detecting optical waveguide core parts 12 at the light exit end faces.

8. 发明专利

JP2000081581A TWIN SWITCH 失效
公开(公告)号：JP2000081581A
公开(公告)日：2000-03-21
申请号：JP24892398
申请日：1998-09-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KURIHARA TAKASHI , OBA NAOKI , TOMARU AKIRA , YOKOYAMA KENJI
IPC分类号： H01H35/00 , G02B26/08 , H04B10/00 , H04B10/27 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To build an inexpensive and customized communication and broadcasting system with two pieces of fiber pairs which is capable of arbitrarily switching one point to another point with a two-core batch by constituting two sets of 1×n optical switches arranged in parallel in such a manner that the optical paths of both are synchronously selected. SOLUTION: Two-core constitution is formed by combining two sets of the 1×n waveguide switches within the same substrate in parallel. The optical path switching of optical signal transmission and reception is executed by using a pigtail type module of the 1×2 thermooptical twin switching. The three points of users 1 to 3 are connected via the 1×2 thermooptical twin switch module. The user 1 and the user 2 are able to make information exchange without having any changes at all from point-to-point when the heaters A to C of the twin switches are synchronously lighted. The user 1 and the user 3 are able to make information exchange without having any changes at all from point-to- point when the twin switches are changed over (B and D are synchronously lighted).

9. 发明专利

JPH09321907A MAIN TELEPHONE SET WITH FACSIMILE FOR TWO-CIRCUIT HOME TELEPHONE 失效
公开(公告)号：JPH09321907A
公开(公告)日：1997-12-12
申请号：JP15905396
申请日：1996-05-30
申请人： KANDA TSUSHIN KOGYO KK , NIPPON TELEGRAPH & TELEPHONE , FUJITSU I NETWORK SYST LTD
发明人： ISHII HISAO , OBA NAOKI , IWAZAWA SHIGERU , MIYAMOTO SHIGEKAZU , KUROKI KOICHI , YAMAMOTO MORITAKA , NAKAMURA KIMITOSHI , TAKANO HISAKIMI
IPC分类号： H04N1/00 , H04M1/64 , H04M1/72 , H04M11/00
摘要： PROBLEM TO BE SOLVED: To simplify an operation and to decrease the number of parts of the main telephone set by setting the automatic transmitting/receiving operations, etc., for either of two circuits via a single operation part and using a single dial signal generation part that can be shared. SOLUTION: When the facsimile telephone number of the opposite party is dialed via an operation part 33 and a start button is pushed, a control part 30 detects whether a circuit 2 is idle or not. If the circuit 2 is busy, the part 30 detects whether a circuit 1 is idle or not. If the circuit 1 is idle, a PB signal generation part 34 is connected to the circuit 1. At the same time, the telephone number dialed via the part 33 is sent to the circuit 1 from the part 34 by a PB signal. Then a circuit switch circuit 41 is switched toward the circuit 1, and a CNG signal is sent to the opposite party. When the confirmation of facsimile is finished to the opposite party, a facsimile part 4 converts the image data read by an image sensor into facsimile signals via a modem 61 and transmits them to the circuit 1 via 2-wire/4-wire converter 43 and a circuit switch circuit 43.

10. 发明专利

JPH09274117A DENDRIMER OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH09274117A
公开(公告)日：1997-10-21
申请号：JP11058896
申请日：1996-04-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KURIHARA TAKASHI , TOMARU AKIRA , OBA NAOKI
IPC分类号： G02B6/12 , C08G65/00
摘要： PROBLEM TO BE SOLVED: To provide a high-polymer optical waveguide with which heat resistance is assured without degrading working and optical characteristics. SOLUTION: This optical waveguide consists of ether ketone based dendrimer which consists of the methyl ether of 3, 5-bis(p-fluoropenzoyl)phenol as its building block and of which the terminal of the dendroid patterns is phenyl etherified 3-, 7- or pentadecamer type. This optical waveguide may otherwise be formed of an ether ketone based superbranched polymer of a triducamer type of which the terminal of the dendroid patterns as the one pot condensation polymer of the building block described above is fluorine. The dendrimer or superbranched polymer may otherwise be formed as a core or clad.

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