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91. 发明专利

JPH09179147A OPTICAL PARTS PROVIDED WITH SWITCHING FUNCTION 失效
公开(公告)号：JPH09179147A
公开(公告)日：1997-07-11
申请号：JP34146895
申请日：1995-12-27
申请人： HITACHI CABLE
发明人： ARAI HIDEAKI , UETSUKA NAOTO , AKIBA KENJI
IPC分类号： G02B6/12 , G02B6/34 , G02F1/01 , G02F1/313 , H04B10/27 , H04B10/29 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To produce plural array waveguide diffraction grating type optical multiplexers/demultiplexers on a substrate with high yield. SOLUTION: A waveguide type filter 103 is constituted by respectively providing a 3dB coupler 115, gratings 118 and 121 installed in the middle of two waveguides pulled out of this coupler, thin film heater 119 provided inside the grating 118, thin film heater 120 provided outside the grating 121, and reflecting film 122 provided at the side edge of SiO substrate 114 while being coupled with the terminal parts of input waveguides 116 and 117, and the incident beams of wavelengths λ1 -λn can be switched to reflection and transmission. On both the sides of such a waveguide type filter 103, circulators 101 and 102 are connected.

92. 发明专利

JPH0973018A LIGHT WAVE LENGTH MULTIPLEXER/DEMULTIPLEXER 失效
公开(公告)号：JPH0973018A
公开(公告)日：1997-03-18
申请号：JP22789995
申请日：1995-09-05
申请人： HITACHI CABLE
发明人： INABA KIMIO , AKIBA KENJI , UETSUKA NAOTO
IPC分类号： G02B6/12 , G02B6/34
摘要： PROBLEM TO BE SOLVED: To provide a light wavelength multiplexer/demultiplexer capable of correcting a central wavelength deviation arising during production. SOLUTION: In a light wavelength multiplexer/demultiplexer provided with a substrate 101, at least one input waveguide 102 formed on the substrate 101, an input side slab waveguide path 103 of a flat plate structure connected to the input waveguide 102, an array waveguide diffraction grating 104 consisting of multiple channels of wave guide paths 113, 114,..., 115 each of which is connected to the input waveguide 102 and has a different waveguide path length Li(i=1, 2, 3,...) from the others by ΔL, an output side slab of a waveguide path 105 connected to the array waveguide diffraction grating 104, and multiple output waveguide paths 106, 107,..., 108 connected to the output side slab of the waveguide path 105, a slit 109 is formed on the array waveguide diffraction grating 104.

93. 发明专利

JPH0961648A NXM SPLITTER WAVEGUIDE ELEMENT 失效
公开(公告)号：JPH0961648A
公开(公告)日：1997-03-07
申请号：JP22029595
申请日：1995-08-29
申请人： HITACHI CABLE
发明人： OKAWA MASAHIRO , SHIRATA TOMOYUKI , UETSUKA NAOTO
IPC分类号： G02B6/122
摘要： PROBLEM TO BE SOLVED: To provide an N×M splitter waveguide element with low loss. SOLUTION: In this N×M splitter waveguide element 11 having an optical circuit 12 formed on a substrate so that a waveguide branches and is curved to form many waveguides, curved parts Cb of output-side waveguides are varied in radius of curvature in stages by the waveguides.

94. 发明专利

JPH0961646A OPTICAL MULTIPLEXER/DEMULTIPLEXER 失效
公开(公告)号：JPH0961646A
公开(公告)日：1997-03-07
申请号：JP21865095
申请日：1995-08-28
申请人： HITACHI CABLE
发明人： UETSUKA NAOTO , ARAI HIDEAKI , AKIBA KENJI , INABA KIMIO
IPC分类号： G02B6/12
摘要： PROBLEM TO BE SOLVED: To provide an optical multiplexer/demultiplexer which has the function of D-WDM and the function of WDM by using one optical component by forming a reflection grating at a specific position of a channel waveguide array for connection. SOLUTION: Light of the 1.55μm band which is made incident on an input waveguide 41 spreads laterally because of diffraction effect when entering an input-side slab waveguide 43a, and then enters the respective waveguides of the waveguide array 45. Refraction gratings 46 of the 1.55μm band are formed almost in the center of the waveguide array 45 and the position of each reflection grating 46 is shifted by certain length from an input-side slave waveguide 43a. Consequently, the lights which are made incident on the respective waveguides are different in reflection position and the tilts of equal-phase surfaces are different by wavelengths of the 1.55μm band right before the input- side slab waveguide 43a. Namely, the light of the 1.55μm band is projected from an output waveguide 42 and branched, and light of the 1.3μm is projected from an output waveguide 44 without being affected by the reflection gratings 45 of the 1.55μm band.

95. 发明专利

JPH08334639A MACH-ZEHNDER OPTICAL CIRCUIT 失效
公开(公告)号：JPH08334639A
公开(公告)日：1996-12-17
申请号：JP14064895
申请日：1995-06-07
申请人： HITACHI CABLE
发明人： UETSUKA NAOTO , ARAI HIDEAKI
IPC分类号： G02B6/12
摘要： PURPOSE: To provide a Mach-Zehnder optical circuit with which the stable execution of wavelength multiplexing and demultiplexing to temp. is possible and there is no need for heating with heaters. CONSTITUTION: The Mach-Zehnder optical circuit of a waveguide type is constituted by connecting the phase shift part 14b consisting two pieces of waveguides 15, 16 which are formed on a substrate 21 and the composed of signal mode channel waveguides consisting of cores 23a having a rectangular shape in section and the structure obtained by embedding the circumferences of these cores 23a with clads 24 having the refractive index smaller than the refractive index of the cores 23a and vary in the length from two directional couplers 13a, 13b consisting of two pieces of parallel channel waveguides between these directional couplers 13a, 13b. Negative refractive index material 25 consisting of materials having the negative coefft. of temp. of the refractive index are disposed on the waveguides at least the phase shift part 14b.

96. 发明专利

JPH08271742A WAVEGUIDE WITH FILTER AND PRODUCTION OF BLOCK FOR FIXING FILTER 失效
公开(公告)号：JPH08271742A
公开(公告)日：1996-10-18
申请号：JP7800695
申请日：1995-04-03
申请人： HITACHI CABLE , NIPPON TELEGRAPH & TELEPHONE
发明人： TOMITA NOBUO , SHIRATA TOMOYUKI , UETSUKA NAOTO , KUROSAWA MASAAKI , OKANO HIROAKI , TAKEYA NORIAKI
IPC分类号： G02B6/12
摘要： PURPOSE: To provide a waveguide with a filter with which the efficient fixing of a cord and a thin-film filter in a manner as to make both perpendicular is possible without warping this thin-film filter at the time of inserting and fixing the thin-film filter into the slit of a waveguide element and a process for producing a block for fixing the filter. CONSTITUTION: The thin-film filter 6 to be inserted into the slit of the waveguide with the filter formed by inserting the thin-film filter 6 into the slit crossing the core 2 of the waveguide element 4 formed on a waveguide substrate 1, then fixing the filter is fixed to the block 10 for fixing the filter and thereafter, this thin-film filter 6 is inserted into the slit and is fixed together with the block 10 for fixing the filter to the waveguide element 4.

97. 发明专利

JPH08110426A PRODUCTION OF OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH08110426A
公开(公告)日：1996-04-30
申请号：JP24604094
申请日：1994-10-12
申请人： HITACHI CABLE
发明人： OKANO HIROAKI , HIGUCHI KEIICHI , UETSUKA NAOTO , TERAOKA TATSUO
IPC分类号： G02B6/122 , G02B6/13
摘要： PURPOSE: To provide a process for producing an optical waveguide having excellent optical characteristics capable of uniformly chipping away glass films by uniformly grinding excess glass films for a first clad layer on a substrate. CONSTITUTION: A bench 23a and a projecting parts 23b of the same height as the height thereof are formed on the substrate 20 and the glass film 24 is formed on the substrate 20, by which the first clad layers 25 are embedded into grooves and the excess glass films 24a, 24b formed on the substrate 23 are uniformly chipped away by grinding, by which the surfaces of the bench part 23a and the projecting parts 23b are exposed. Next, a core waveguide 27 is formed on the first clad layer 25 embedded in the substrate and a second clad layer 29 is formed on the core waveguide 27. The second clad layer 29 is subjected to fine working, by which the bench 23a for placing a semiconductor element on the substrate is exposed again.

98. 发明专利

JPH0843654A SILICA GLASS WAVEGUIDE AND ITS PRODUCTION 失效
公开(公告)号：JPH0843654A
公开(公告)日：1996-02-16
申请号：JP18118394
申请日：1994-08-02
申请人： HITACHI CABLE
发明人： OKANO HIROAKI , UETSUKA NAOTO , KAMOSHITA TOSHIKAZU , TERAOKA TATSUO , TOKUNAGA TOSHIHIDE
IPC分类号： G02B6/13 , G02B6/12
摘要： PURPOSE:To decrease warpage of a Si substrate to be extremely small after a first clad layer is formed. CONSTITUTION:First, a groove 7 having width W2 and height H necessary to satisfy the optical characteristics to embed a first clad layer is formed in a Si substrate 1, and the first clad layer 2 comprising SiO2 glass having refractive index n0 is embedded in the groove 7. Then, the whole surface of the Si substrate including the first clad layer 2 is coated with a core glass film 3 having refractive index n1 (n1>n0). Then, a core waveguide 4 having an almost square cross section is formed by photolithography and reactive ion etching on the first clad layer 2. Further, a porous glass layer 5 of SiO2-B2O3-P2O5 is formed by flame deposition method on the whole surface of the Si substrate 2 including the core waveguide 4. The glass layer is sintered to the changed into a transparent glass to form a SiO2-B2O3-P2O5 glass having n0 refractive index as the second clad layer 6.

99. 发明专利

JPH07198972A Y BRANCH OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH07198972A
公开(公告)日：1995-08-01
申请号：JP33837493
申请日：1993-12-28
申请人： HITACHI CABLE
发明人： SHIRATA TOMOYUKI , UETSUKA NAOTO , ARAI HIDEAKI , SHIODA TSUNEO , AKIBA KENJI
IPC分类号： G02B6/122
摘要： PURPOSE:To provide a Y branch optical waveguide with less loss in a branch part and easy for manufacture. CONSTITUTION:The Y branch optical waveguide is provided with an input waveguide 20 in a clad on a substrate, a tapered waveguide 21 connected to the input waveguide 21 and whose output side width is expanded and branch waveguides 22, 23 connected to the tapered waveguide 21 without in contact with each other at fixed interval and branching an inputted beam to two parts. Then, a connection part 26 between the branch waveguides 22, 23 and the tapered waveguide 21 is expanded to a value adding twice of the width W1 of the input end side of the branch waveguides 22, 23 and the width W of the output end side of the branch waveguides 22, 23.

100. 发明专利

JPH0792506A WAVEGUIDE TYPE OPTICAL SWITCH 失效
公开(公告)号：JPH0792506A
公开(公告)日：1995-04-07
申请号：JP23490793
申请日：1993-09-21
申请人： HITACHI CABLE
发明人： UETSUKA NAOTO , AKIBA KENJI
IPC分类号： G02B6/122 , G02B6/12 , G02B6/34 , G02F1/295 , G02F1/313
摘要： PURPOSE:To provide a compact waveguide type optical switch capable of greatly increasing the number of channels by using two waveguide type lenses forming slab waveguides and many pieces of phase shift waveguides. CONSTITUTION:The incident light on a certain channel of the input waveguide 6 where many pieces of waveguides are radially arranged is emitted in the form of light of a sinc functional distribution to a slab type lens 7. The light becomes to be rectangularly distributed by passing the slab type lens 7 and is made incident on plural pieces of the adjacent waveguide groups corresponding to the channels of the phase shift waveguides 8. The light is subjected to phase control by respective electrodes 11 formed in the phase shift waveguides 8, thereby the inclination of the wave front of the light of the rectangular distribution emitted to the slab type lens 9 and is further condensed to the light of the sinc functional distribution so as to be coupled to the output waveguides 10 of the desired channels.

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