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

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

JPH11258435A ARRAY WAVEGUIDE TYPE WAVELENGTH COMPOUNDING AND BRANCHING FILTER 失效
公开(公告)号：JPH11258435A
公开(公告)日：1999-09-24
申请号：JP5947098
申请日：1998-03-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KANEKO AKEMASA , GO TAKASHI , TAKAHASHI HIROSHI , OMORI YASUJI , INOUE YASUYUKI
IPC分类号： G02B6/12 , G02F1/01 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To provide an easy and highly precise trimming function for output channel wavelength indispensable for actualizing wavelength dividing multiple channel system. SOLUTION: This wavelength compounding and branching filter comprises a channel waveguide 1 for input, a channel waveguide route 2 for output, a channel waveguide array 7, a first fan-shaped slab waveguide route 3 for connecting the channel waveguide 1 for input and the channel waveguide array 7, a second fan-shaped slab waveguide route 4 for connecting the channel waveguide 2 for output and the channel waveguide array 7. The channel waveguide array 7 gas a structure in which the lengths successively become longer by a prescribed optical route length difference and either one or both of the first fan/shaped slab waveguide 2 and the second fun-shaped slab waveguide 4 have regions with different refractive indexes as to shift focusing positions by refracting the transmitted light rays.

3. 发明专利

JPH1090530A ARRAY WAVEGUIDE GRATING 失效
公开(公告)号：JPH1090530A
公开(公告)日：1998-04-10
申请号：JP23944396
申请日：1996-09-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKAMOTO KATSUNARI , TAKAHASHI HIROSHI
IPC分类号： G02B6/12
摘要： PROBLEM TO BE SOLVED: To provide an array waveguide grating having a flat optical frequency characteristic. SOLUTION: By connecting two output waveguides 25 that one side waveguide length is longer than the other side of an inputting channel waveguide containing two waveguides 21 having a prescribed optical path difference and two 3dB couplers 22, 23 respectively coupling both ends of two waveguides 21 and constituting an aymmetrical Mach-Zehender interference device to a first sector slab waveguide 15 at an interval of a half of the interval in an outputting channel waveguide 13, flat bands of a half or above of a channel interval are obtained in respective channels, and the flat optical frequency characteristic that a dividing output characteristic is nearly fixed even when the wavelength (optical frequency) of the light source is changed is realized.

4. 发明专利

JPH1039150A WAVEGUIDE TYPE OPTICAL CIRCUIT AND ITS PRODUCTION 失效
公开(公告)号：JPH1039150A
公开(公告)日：1998-02-13
申请号：JP19442096
申请日：1996-07-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HIROSHI , HIMENO AKIRA
IPC分类号： G02B6/122 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To lessen the dependence on temp. by forming a layer having a coefft. of thermal expansion different from the coefft. of thermal expansion of a substrate. SOLUTION: The waveguide type optical circuit 2 includes at least a silicon substrate 1 and a plane type optical waveguide formed on the substrate 1. The layer having a coefft. of thermal expansion different from the coefft. of thermal expansion of the substrate 1 is formed on the lower side of the substrate 1 or the upper side of the plane type optical waveguide or both thereof. For example, the circuit is constituted by adhering a titanium-added quartz glass plate 3 which is the layer having the coefft. of thermal expansion different from the coefft. of thermal expansion of the substrate 1 on the upper side of the substrate 1 to suppress the expansion and contraction of the silicon substrate 1. At the time of manufacture, a quartz glass film is formed on the silicon substrate 1 by using a flame hydrolysis glass film deposition method and executing patterning of the waveguides by photolithography and reactive ion etching. The titanium-added quartz glass plate 3 is thereafter adhered as a low αplate by using an epoxy adhesive. Further preferably, the layer having the coefft. of thermal expansion smaller than the coefft. of thermal expansion of the substrate 1 is formed on the lower side of the substrate 1 or the upper side of the plane type optical waveguide or both thereof.

5. 发明专利

JPH08334637A ARRAY WAVEGUIDE TYPE OPTICAL MULTIPLEXER/DEMULTIPLEXER 失效
公开(公告)号：JPH08334637A
公开(公告)日：1996-12-17
申请号：JP14015295
申请日：1995-06-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HIROSHI , INOUE YASUYUKI
IPC分类号： G02B6/12
摘要： PURPOSE: To stably obtain an array waveguide type optical multiplexer/ demultiplexer which is free from reflected return light by imparting a slight inclination to the direction of the groove disposed near a straight line connecting the mid-points of waveguides. CONSTITUTION: The groove 7 crossing the waveguides constituting array waveguide diffraction gratings 4(9)s cut at the canter of the array waveguide diffraction gratings 4 in order to eliminate the dependency on polarization. The groove 7 is not perpendicular to the waveguides constituting the array waveguide diffraction gratings 4 but inclines slightly with a horizontal direction. The array waveguide diffraction gratings 4 are so constituted that δθ meets the equation when the spacing of the input waveguides 2 in the juncture to a first slab waveguide 3 is defined as Δx, the radius of curvature of the first slag waveguide 3 as (f), the spacing of the plural waveguides varying in lengths in the parts intersecting with the groove as D, the effective refractive index of the slag waveguide 3 as ns , the effective refractive index of the plural waveguides varying in the lengths as nc and the angle formed by the groove 7 and the plural waveguides varying in the lengths as x/2±δθ(radian).

6. 发明专利

JPH08204401A CIRCULAR WAVEGUIDE TM11 MODE FILTER 失效
公开(公告)号：JPH08204401A
公开(公告)日：1996-08-09
申请号：JP878295
申请日：1995-01-24
申请人： SHIMADA PHYSICAL CHEM IND CO , NIPPON TELEGRAPH & TELEPHONE
发明人： ASARI SATORU , KONDO AKIRA , HIGA HIDEMITSU , MORIKAWA YOFUMI , TAKAHASHI HIROSHI
IPC分类号： H01P1/16 , H01P1/30
摘要： PURPOSE: To diffuse heat generated in a resistor bar on the wall surface of a circular waveguide satisfactorily by arranging plural cruciform dielectrics of thickness thinner than guide wave length in the circular waveguide and supporting the resistor bar with their arm parts. CONSTITUTION: Two cruciform dielectrics 7 of thickness sufficiently thinner than the wave guide length of the circular waveguide 1 and of diameter nearly equal to that of the circular waveguide 1 and with high thermal conductivity and low dielectric constant are arranged in the circular waveguide 1 keeping a prescribed interval. Such interval between the cruciform dielectrics 7 can be selected at a distance so as to negate mutual impedance non-matching in a required frequency area. Each of the arm parts 7a-7d of the cruciform dielectrics 7 is formed in such a way that a hole of same diameter as that of the resistor bar 3 is opened at a position in which an electric field in the cross-sectional direction of a circular TM mode is mostly concentrated advancing the direction of tubal axis, and the resistor bar 3 is inserted through the hole, and supported by adhering with a conductive adhesive. Therefore, the heat generated in each resistor bar 3 is propagated through the cruciform dielectric 7 and diffused on the circular waveguide 1, which suppresses temperature rise in each resistor bar 3.

7. 发明专利

JPH0756199A POLARIZATION-INDEPENDENT WAVEGUIDE TYPE OPTICAL SWITCH 失效
公开(公告)号：JPH0756199A
公开(公告)日：1995-03-03
申请号：JP20217793
申请日：1993-08-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： INOUE YASUYUKI , ANDO SHINJI , SAWADA TAKASHI , TAKAHASHI HIROSHI
IPC分类号： G02F1/313 , G02F1/00
摘要： PURPOSE:To provide a polarization-independent type waveguide type optical switch which does not depend on a polarization state of input light among waveguide type optical switches utilizing an electro-optical effect. CONSTITUTION:This polarization-independent type waveguide type optical switch using the electro-optical effect is composed of an LiNbO3 substrate 1, optical waveguides 2 formed in the LiNbO3 substrate and electrodes 3, 4 formed on the LiNbO3 substrate 1. Half-wave plates 6 of a thin-film type are inserted into at least one point of the optical waveguides.

8. 发明专利

JPH04163406A WAVEGUIDE TYPE OPTICAL COUPLER 失效
公开(公告)号：JPH04163406A
公开(公告)日：1992-06-09
申请号：JP28938090
申请日：1990-10-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HIROSHI , NISHI NORIO , OKUNO MASAYUKI
IPC分类号： G02B6/12 , G02B5/18 , G02B6/34
摘要： PURPOSE:To eliminate the polarization dependence without necessity of eliminating double refraction of respective channel waveguides by arranging a polarization separation circuit and two input waveguides for horizontal polarized light and for vertical polarized light. CONSTITUTION:The wavelength multiple signal light from a transmission line 9 are separated into a horizontal polarization (TE) light component and a vertical polarization (TM) light component by means of a polarization separation circuit 10, and through polarization holding fibers 11, 12 the TE polarization light component and the TM polarization light component pass through the first input waveguide 2 and the second input waveguide 3 respectively, leading to incidence on an input side slab waveguide 4. The light diffuses because no horizontal confinement exists within the slab waveguide, and waves are guided into a plurality of channel waveguide 6. After receiving the required phase difference at an array waveguide, the light is emitted to the output side slab waveguide, and converges in the vicinity of the center of curvature. The converging position is obtained from a different output waveguide 8 based on the wavelength according to the phase difference received at the array waveguide.

9. 发明专利

JPH01135902A SKIN GRIPPING SECTION OF COMMUNICATION CABLE 失效
公开(公告)号：JPH01135902A
公开(公告)日：1989-05-29
申请号：JP28938887
申请日：1987-11-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HIROSHI , HINOHARA TSUNEHITO , KOSUGI KENJI
IPC分类号： F16B2/06
摘要： PURPOSE: To make an envelope gripping unit usable for various kinds of cables with different outer diameters by employing a rotabably mounted clamp to grip the envelope of the communication cable. CONSTITUTION: A screw 92 attached to a clamp 9 is screwed into a threaded hole 71 in a gripper 7 so as to mount the clamp 9 the to gripper 7. The gripper 7, which has a structure separated into an upper and a lower portions and to which the clamp 9 is mounted, is allowed to cover a cable 11 and is fastened by a bolt 8. The screw 92 of the clamp 9 is fastened with a driver at a specified torque, and a metal plate in the shape of a circular arc having protrusions 91 is embedded into the cable envelope thus fixing the envelope. Since the clamp 9 acts as the same role as a conventional inner gripper and a gripper spacer, the gripper spacer and the inner gripper needing numerous kinds of parts become unnecessary, thus reducing the cost. Further, the operation of forming the gripping unit becomes easier due to the simplification of the structure.

10. 发明专利

JPS61148514A NON-CONTACT POSITIONING DEVICE 失效
公开(公告)号：JPS61148514A
公开(公告)日：1986-07-07
申请号：JP27020184
申请日：1984-12-21
申请人： NIPPON TELEGRAPH & TELEPHONE , TOSHIBA CORP
发明人： NAKAGAWA KAZUO , KAWAKAMI YOICHI , TAKAHASHI HIROSHI , SHIMAMOTO YOSHIHARU , TAKAHARA KENICHI , SUDO HAJIME , SUGIURA CHIYUU
IPC分类号： G05D3/00 , F16C39/06 , H01Q3/08
摘要： PURPOSE:To improve the reliability of a device, and to make it small in size by providing plural electromagnets on a fixed body in accordance with each positioning direction of a floating body, forming the floating body of a ferromagnetic material, and also structuring the magnetic material so as to contain all the electromagnets. CONSTITUTION:Six degrees of freedom of a floating body 1 can be secured by total 14 pieces of electromagnets. In such a case, all the electromagnets are contained in the floating body 1 which is formed by a ferromagnetic material, therefore, it does not occur that each magnetic loop Mla-Mld, M2a-M2d, M3a, M3b, and M4a-M4d is disturbed by magnetism from the outside of the floating body 1, or the whole device moves so as to follow up the external magnetism. Also, it does not occur either that a magnetic flux generated from each electromagnet leaks to the outside. In case of such a device, with respect to the interval between electromagnet groups 16, 17 the smaller the diameter of the floating body 1 is, the higher a magnetic rigidity of the device becomes. Accordingly, by constituting a device which is long longitudinally, a comparatively heavy object such as a parabolic antenna, etc. can be supported by a small- sized device.

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