专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2002139640A OPTICAL WAVEGUIDE, ITS MANUFACTURING METHOD AND OPTICAL WAVEGUIDE CIRCUIT 审中-公开
公开(公告)号：JP2002139640A
公开(公告)日：2002-05-17
申请号：JP2001244263
申请日：2001-08-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ITOU MIKITAKA , KASAHARA RYOICHI , SAIDA TAKASHI , HIDA YASUHIRO
IPC分类号： G02B6/122 , G02B6/12 , G02B6/13 , G02F1/01 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide and an optical waveguide circuit, by which a state of polarization independence or a desired low level polarization dependency is realized without deteriorating optical characteristics and reliability, and an optical waveguide, an optical waveguide circuit of polarization independence or low level polarization dependence type, and to provide a method for manufacturing the optical waveguide by which it will not be a increased burden in production and in cost. SOLUTION: The optical waveguide and the optical waveguide circuit are provided with a lower clad 12, which is provided on a planar substrate 11 and has a ridge 15, a core 13 for propagating light, which is provided on the ridge of the lower clad 12, and an upper clad 14 which is provided so as to cover the core 13. The ridge 15 is worked into a shape, which is decided so as to realize polarization independence for the optical waveguide.

2. 发明专利

JP2019020624A 光導波路审中-公开
公开(公告)号：JP2019020624A
公开(公告)日：2019-02-07
申请号：JP2017140097
申请日：2017-07-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATAYOSE SATOMI , WATANABE HIROSHI , KASAHARA RYOICHI
IPC分类号： G02B6/122
摘要：【課題】熱処理においてコア層がアンダークラッド層中に沈み込むことを抑制し、且つコア膜の面内均質化を実現可能な光導波路を提供すること。【解決手段】本発明に係る光導波路は、基板と、前記基板上に形成されたSiO2アンダークラッド層と、前記SiO2アンダークラッド層上に形成されたコア層と、前記SiO2アンダークラッド層及び前記コア層上に設けられたコア膜と、前記コア膜上に形成されたSiO2オーバークラッド層と、を備えた光導波路であって、前記SiO2アンダークラッド層及び前記SiO2オーバークラッド層にはドーパントが添加されており、前記コア膜は、前記コア層の厚みの5%以下の厚みを有することを特徴とする。【選択図】図3

3. 发明专利

JP2019002975A 光増幅装置およびそれを用いた伝送システム审中-公开
公开(公告)号：JP2019002975A
公开(公告)日：2019-01-10
申请号：JP2017116020
申请日：2017-06-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAZAMA TAKUSHI , ABE SHINJI , UMEKI TAKESHI , KASAHARA RYOICHI , ENBUTSU KOUJI , KASHIWAZAKI TAKAHIRO
IPC分类号： G02F1/39 , G02F1/377 , H04B10/293
摘要：【課題】従来技術の中継型PSAでは、BPSK変調信号光から搬送波位相を抽出するため、PPLN導波路の非線形過程を用いて位相方向変調をキャンセルしていた。信号光が強度方向に多値化された変調に対しては強度変調成分をキャンセルできず、抽出搬送波には強度変調成分が残留する。PSAのPPLN導波路モジュールへの励起光を、抽出搬送波から生成すれば、雑音成分からのエネルギー移行により光増幅器のSN比が劣化する。【解決手段】本発明の光伝送システムおよび光増幅装置は、強度方向に多値化された変調信号に対しPSA中継増幅動作を実現する。信号光を中心に周波数軸上で対称に離調して配置された2波長を持ち、互いに位相共役関係にあるパイロットトーンのペアを用いられる。変調フォーマットによらず、強度方向に多値化された信号に対しても搬送波位相を抽出できる。パイロットトーンのペアの和周波光を生成し、信号光を縮退位相感応光増幅する2次高調波励起光を生成する。PSAの多段接続も可能となる。【選択図】図6

4. 发明专利

JP2003255168A OPTICAL CIRCUIT 审中-公开
公开(公告)号：JP2003255168A
公开(公告)日：2003-09-10
申请号：JP2002061156
申请日：2002-03-06
申请人： NTT ELECTRONICS CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： TERUI HIROSHI , SHUDO KEIZO , MINO SHINJI , KASAHARA RYOICHI
IPC分类号： G02B6/42 , G02B6/12 , G02B6/122
摘要： PROBLEM TO BE SOLVED: To realize an optical communication network which has high mounting density, high mass-productivity, and higher performance. SOLUTION: On a flat substrate 1, a 1st monitoring optical waveguide 3 which crosses a linear main optical waveguide 2 and a 2nd monitoring optical waveguide 4 at an angle 2α is formed. At the intersection part of the main optical waveguide 2 and 1st monitoring optical waveguide 3, a filter insertion groove 5 which is perpendicular to the substrate 1 is formed. Into the filter insertion groove 5, an optical filter 6 for tapping monitor light from the main optical waveguide 2 is inserted so as to meet a reflecting surface of the 1st monitoring optical waveguide 3. In the intersection part of the 1st monitoring optical waveguide 3 and 2nd monitoring optical waveguide 4, a monitor light reflecting groove 8 is digged deeply enough to reach the substrate 1 and one wall surface which constitutes the groove 8 and is perpendicular to the substrate 1 is such a reflecting surface that both the optical waveguides 3 and 4 satisfy the relation of an incidence/reflection angle α at the intersection part. COPYRIGHT: (C)2003,JPO

5. 发明专利

JP2002328245A OPTICAL MODULE 失效
公开(公告)号：JP2002328245A
公开(公告)日：2002-11-15
申请号：JP2001134419
申请日：2001-05-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OGAWA IKUO , HASHIMOTO TOSHIKAZU , KASAHARA RYOICHI , SAIDA TAKASHI , KITAGAWA TAKESHI
IPC分类号： G02B6/26 , G02B6/12 , G02B6/122
摘要： PROBLEM TO BE SOLVED: To provide a highly functional and high performance optical module in which the problems of the connection loss between a plane optical waveguide and an optical element and the variation of the loss are remedied. SOLUTION: In the optical module provided with the plane optical waveguide 1 having an approximately single waveguide mode and with an optical waveguide device 100 which is optically connected with the plane optical waveguide, at least one or more wave front conversion parts 12-1 are arranged along the transmission route of light on a light input/output end face 12 or in the vicinity thereof of the plane waveguide, the part 12-1 emitting an light beam condensed only in approximately plane direction of the plane optical waveguide 11 and converting the wave front of the light wave.

6. 发明专利

JP2001222034A INTERFRENCE TYPE THERMOOPTICS OPTICAL PART 失效
公开(公告)号：JP2001222034A
公开(公告)日：2001-08-17
申请号：JP2000032964
申请日：2000-02-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KASAHARA RYOICHI , GO TAKASHI
IPC分类号： G02F1/01 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To provide an interference type thermooptics optical part whose power is saved and whose characteristic is excellent without accompanied with the increase of the size of circuit and the degradation of the characteristic. SOLUTION: In this optical part, grooves 5 which are formed by removing the waveguide material on both sides of two lines of optical waveguides 33a, 33b are provided at one parts of the waveguides to which two multiplexer/ branching filters 32a, 32b being Mach-Zehender interferometers are connected and a thin film heater 4a is loaded at the region where the groove 5 is formed on the optical waveguide 33a and a thin film heater 4b is loaded at the region where the groove 5 is not formed on the other optical waveguide 33b.

7. 发明专利

JP2001111156A OPTICAL MODULE 失效
公开(公告)号：JP2001111156A
公开(公告)日：2001-04-20
申请号：JP28833599
申请日：1999-10-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HASHIMOTO TOSHIKAZU , KASAHARA RYOICHI , KATO KUNIHARU
IPC分类号： G02B6/122 , G02B6/42 , H01L31/02 , H01L33/54 , H01L33/56 , H01L33/62 , H01L33/64 , H01S5/022 , H01L33/00
摘要： PROBLEM TO BE SOLVED: To improve thermal resistance of an optical module by a method wherein, in the optical module having an insulation layer mounting an optical element on a substrate having a wave guide path, thermal resistance by the insulation layer is decreased and a thermal conduction in the other parts is increased. SOLUTION: An area of a solder or an electric wiring part 6 for fixing or driving an optical element 7 is greater than the area of the optical element 7, thereby diffusing heat from the optical element. A grounded silicon substrate 1 is electrically connected to the optical element 7 with a solder part 6, and an insulation layer 5 is provided between the optical element of an optical element mounting part 4 and the silicon substrate. In the other parts, the insulation layer is thinned, or eliminated, and a radiation solder is drawn around on the silicon substrate. Furthermore, the optical element mounted on the silicon substrate via the insulation layer 5 and the periphery of any or all of electric wirings for driving the optical element are coated with a transparent resin (with a wavelength of the optical element), and further coated with a resin of a high conductivity thereon.

8. 发明专利

JP2003255167A LIGHT INTENSITY MONITOR CIRCUIT 审中-公开
公开(公告)号：JP2003255167A
公开(公告)日：2003-09-10
申请号：JP2002059390
申请日：2002-03-05
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： KASAHARA RYOICHI , INOUE YASUYUKI , MINO SHINJI , YANAGISAWA MASAHIRO , KAWASHIMA YOSHITSUGU , YAMADA YASUBUMI , TERUI HIROSHI
IPC分类号： G02B6/122 , G02B5/26 , G02B6/12
摘要： PROBLEM TO BE SOLVED: To provide a light intensity monitor circuit whose insertion loss and photodetection intensity less depend upon a polarized wave and a small-sized multi-channel light intensity monitor circuit which is constituted by integrating a plurality of light intensity monitors and has light crosstalk suppressed. SOLUTION: The light intensity monitor circuit is equipped with a 1-input, 2-output optical branch circuit 33 which is formed on a substrate and branches light at a certain intensity ratio, an input terminal 31 to which an input waveguide 33a of the optical branch circuit 33 is connected at a circuit end, and an output terminal 32 to which a 1st waveguide 33b of the optical branch circuit 33 is connected at a circuit end. A PD 8 which is mounted in a mounting groove 5 where a waveguide material is removed to optically be coupled with a 2nd output waveguide 33b is connected to the 2nd output waveguide 33b. A filter insertion type optical branch circuit which has a thin film filter 10 inserted into the groove 9 formed at the intersection part of crossing waveguides is used as the optical branch circuit 33. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2003207660A OPTICAL WAVEGUIDE 审中-公开
公开(公告)号：JP2003207660A
公开(公告)日：2003-07-25
申请号：JP2002004370
申请日：2002-01-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HIROSHI , ITOU MIKITAKA , KASAHARA RYOICHI
IPC分类号： G02B6/122
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide device having no polarization dependency. SOLUTION: On at least one of the top and reverse surfaces of a waveguide core 4 provided on a lower clad layer 3, a stress adjusting film 6 or 7 which has a small coefficient of thermal expansion is provided and thus the strain of the waveguide core 4 is suppressed to prevent double refraction from being caused, thereby obtaining the optical waveguide having no polarization dependency. COPYRIGHT: (C)2003,JPO

10. 发明专利

JP2019004253A 光増幅装置およびそれを用いた光伝送システム审中-公开
公开(公告)号：JP2019004253A
公开(公告)日：2019-01-10
申请号：JP2017116017
申请日：2017-06-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAZAMA TAKUSHI , ABE SHINJI , UMEKI TAKESHI , KASAHARA RYOICHI , SHIBAHARA MITSUKI , MIYAMOTO YUTAKA , ENBUTSU KOUJI , KASHIWAZAKI TAKAHIRO
IPC分类号： H04B10/291 , G02F1/377 , G02F1/39
摘要：【課題】分散補償ファイバではなくシングルモードファイバー(SMF)を伝送した後の信号に対しても、光ファイバ中の分散に伴う位相変動に起因する信号品質の劣化を防止可能な、位相感応光増幅器(PSA)を適用した光伝送システムを提供する。【解決手段】光伝送システム400では、送信器401側において、変調信号に対して伝送路内で生じる波長分散との逆の波長分散を与える前置補償を行い、前置分散補償された変調光を伝送路に送信し、伝送路内で生じる波長分散による信号品質の劣化を低減またはキャンセルする。2値位相変調(BPSK)信号に対して前置分散補償を行った変調信号で変調した信号光と縮退型PSAを組み合わせ、あるいは、4値位相偏移変調(QPSK)信号に対して前置分散補償を行った変調信号で変調した信号光群と非縮退型PSAを組み合わせ、光伝送システムを構成する。【選択図】図4

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式