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41. 发明专利

JP2000321450A OPTICAL MULTIPLEXING/DEMULTIPLEXING CIRCUIT 失效
公开(公告)号：JP2000321450A
公开(公告)日：2000-11-24
申请号：JP13119399
申请日：1999-05-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAIDA TAKASHI , OKUNO MASAYUKI , HIMENO AKIRA , KANEKO AKEMASA , GO TAKASHI , OKAMOTO KATSUNARI
IPC分类号： G02B6/12 , G02F1/313 , H04B10/2507 , H04B10/27 , H04B10/29 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To make it possible to easily stabilize wavelength multiplexing and demultiplexing characteristics at all times by providing the above circuit with a compensation material which is packed in grooves crossing array waveguide gratings and has a specific refractive index temperature coefficient. SOLUTION: Channel optical waveguides 15 for output of the first array waveguide gratings 10 are the first input ports of 2×2 optical switches 50 and channel optical waveguides 21 for input of the second array waveguide gratings 20 are likewise the first output ports. Channel optical waveguides 40 for external input are the second input ports of the 2×2 optical switches 50 and channel optical waveguides 30 for external output are likewise the second output ports. The channel optical waveguide arrays 13 and 23 of the array waveguide gratings 10 and 20 are respectively provided with the grooves 16 and 26 in mid-way of these arrays so as to cross the same. The compensation material having the refractive index temperature coefficient of a sign different from the sign of the temperature coefficient of the effective refractive indices of the channel optical waveguide arrays 13 and 23 is packed in these grooves 16 and 26.

42. 发明专利

JP2000275470A PLANAR OPTICAL WAVE CIRCUIT DEVICE WITH INPUT/OUTPUT FIBER 失效
公开(公告)号：JP2000275470A
公开(公告)日：2000-10-06
申请号：JP7668499
申请日：1999-03-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIBINO YOSHINORI , HIMENO AKIRA , SHIMIZU MAKOTO , ISHII MOTOHAYA
IPC分类号： G02B6/255 , G02B6/122 , G02B6/30 , G02B6/42 , H04B10/25 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14
摘要： PROBLEM TO BE SOLVED: To reduce coupling losses in a planar optical wave circuit device and to reduce the cost of the device by achieving miniaturization and integration of planar optical waveguide chips. SOLUTION: In this device using a planar optical wave circuit comprising an optical waveguide consisting of a high-refractive-index core formed on a planar substrate and cladding around the core, a fiber for input and output of optical signals for application to an optical communication system to which the device 23 is applied is connected as an intermediate fiber 27, (33) between the device 23 and a fiber 29, (33) for use in the optical communication system. The intermediate fiber has a heat diffusion core 28, (34) in a portion thereof. At least a portion of the heat diffusion core of the intermediate fiber is provided with a fused part or a connector connecting part. In at least a portion of the intermediate fiber, its mode field diameter equals the mode field diameter of the planar optical wave circuit and its cutoff wavelength equals the cutoff wavelength of the fiber used in the optical communication system.

43. 发明专利

JP2000241644A MULTI-MODE INTERFERENCE OPTICAL COUPLER 失效
公开(公告)号：JP2000241644A
公开(公告)日：2000-09-08
申请号：JP6440199
申请日：1999-03-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAIDA TAKASHI , HIMENO AKIRA , OKUNO MASAYUKI , OKAMOTO KATSUNARI , KANEKO AKEMASA
IPC分类号： G02B6/122 , G02B6/293
摘要： PROBLEM TO BE SOLVED: To provide a multi-mode interference optical coupler of a non-equally branched type with simple structure to make its layout easy. SOLUTION: In this optical coupler 10, a width of one portion in a core part of a multi-mode optical wave guide 13 arranged between input optical wave guides 12a, 12b and output optical wave guides 14a, 14b is reduced to form a zone (refractive index changing part) 15 different in a refractive index, and a Mach-Zehnder interferometer or an extended Mach-Zehnder interferometer is thereby constituted equivalently to realize an optional branching ratio. The zone 15 different in the refractive index is a clad layer.

44. 发明专利

JP2000039633A ADD/DROP OPTICAL SWITCH 失效
公开(公告)号：JP2000039633A
公开(公告)日：2000-02-08
申请号：JP20802598
申请日：1998-07-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIMENO AKIRA , OKUNO MASAYUKI , OGUMA MANABU , HATTORI KUNINORI , FUKUI MASAKI
IPC分类号： G02F1/31 , H04B10/27 , H04B10/296 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To obtain an optical switch having an optical attenuation function for respectively sufficiently suppressing add signals to be incorporated into drop signal output terminals and the drop signals to be incorporated into main signal output terminals and further regulating the power of the add signals and drop signals. SOLUTION: This optical switch has four pieces of 2×2 optical switches composed of a Mach-Zehnder interferometer of 2 inputs 2 outputs. The one output terminal of the first 2×2 optical switch 11 and the one input terminal of the second 2×2 optical switch 14 are connected. The other output terminal of the first 2×2 optical switch 11 and the one input terminal of the fourth 2×2 optical switch 14 are connected. The one output terminal of third 2×2 optical switch 13 and the other input terminal of fourth 2×2 optical switch 14 are connected. The other output terminal of the third 2×2 optical switch 13 and the other input terminal of the second 2×2 optical switch 12 are opened from each other.

45. 发明专利

JPH1130722A OPTICAL MODULE 失效
公开(公告)号：JPH1130722A
公开(公告)日：1999-02-02
申请号：JP18614897
申请日：1997-07-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA YASUBUMI , OGAWA IKUO , EBISAWA FUMIHIRO , HIMENO AKIRA
IPC分类号： G02B6/30 , G02B6/122 , G02F1/01
摘要： PROBLEM TO BE SOLVED: To provide the high-performance hybrid optical integrated module used for optical communication. SOLUTION: The optical module includes an active optical element 2 which has a light input end and a light output end at opposite positions on the substrate and a passive optical circuit having an input optical connection part 11, an active optical element input connection part 12, an active optical element output connection part 13, and an output optical connection part 14 and further has the active optical element input connection part 13 of the passive optical circuit and the light input end of the active optical element 2 coupled optically and the active optical element output connection part 13 of the passive optical circuit and the optical output end of the active optical element 2 coupled optically; and the active optical element input connection part 12 and active optical element output connection part 13 are so arranged that the optical axis of the input light from the input optical connection part 11 is not parallel to the optical axis of the output light from the output optical connection part 14.

46. 发明专利

JPH10227934A OPTICAL CIRCUIT COMPONENT AND ITS MANUFACTURE, AND OPTICAL CIRCUIT ALIGNING DEVICE 失效
公开(公告)号：JPH10227934A
公开(公告)日：1998-08-25
申请号：JP3087297
申请日：1997-02-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOMINATO TOSHIMI , HIMENO AKIRA , ISHII MOTOHAYA , KATO KUNIHARU , HANAWA FUMIAKI , SUZUKI SENTA , OKUNO MASAYUKI , KITO TSUTOMU , TAKAHASHI HIROSHI , NAKAGOME HIROSHI
IPC分类号： G02B6/30 , G02B6/12 , G02B6/122 , G02F1/313
摘要： PROBLEM TO BE SOLVED: To decrease a wiring man-hour and the number of connection components and to suppress deterioration in optical circuit component performance by arranging input and output waveguides on the same end surface of a substrate by a bend provided halfway in an optical circuit and connecting optical input and output fibers on the end surface. SOLUTION: The optical circuit is an array waveguide diffraction grating 100 having the input optical waveguide 101, the output optical waveguide 102, an optical waveguide array 103, a slab waveguide 104, a 1st optical waveguide 106 for alignment, and an optical waveguide 107 for measurement formed on a substrate 108. The input and output waveguides are arranged on the same end surface of the substrate 108 by the bend provided halfway in the optical circuit and the optical input and output fibers are connected on the end surface. Therefore, the input and output optical fibers can be arranged in the same direction of optical circuit components and the input fiber and output fiber can be connected to optical circuit elements by optical fiber components put in one housing.

47. 发明专利

JPH1068833A OPTICAL WAVEGUIDE AND ITS PRODUCTION AS WELL AS OUTPUT CIRCUIT 失效
公开(公告)号：JPH1068833A
公开(公告)日：1998-03-10
申请号：JP22790796
申请日：1996-08-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATTORI KUNINORI , KITAGAWA TAKESHI , TANAKA TAKUYA , HIMENO AKIRA , OMORI YASUJI
IPC分类号： G02B6/122 , G02B6/12 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To obtain an optical waveguide which is not fluctuated in operating wavelength with respect to a change in an environment temp. by forming an upper clad layer consisting of a photopolymer material on the upper part of a part including a core. SOLUTION: A lower clad quartz glass layer 12 is formed by a flame deposition method on a silicon substrate 11. Next, a groove 13 for forming the core is formed by a photograph stage and reactive ion etching. Core glass soot is then deposited by the flame deposition method and is held in an electric furnace, by which the soot is sintered and a transparent core glass layer 14 is formed. Next, the core glass layer 14 is removed by reactive ion etching to form the core 15, by which an air clad optical waveguide is formed. Finally, the upper clad layer 16 consisting of the photopolymer material, such as polymethyl methacrylate(PMMA) is formed. Then, the so-called thermal waveguide having the refractive index consistent with the temp. change is obtd. by controlling the refractive index of the photopolymer material.

48. 发明专利

JPH0586711B2 失效
公开(公告)号：JPH0586711B2
公开(公告)日：1993-12-14
申请号：JP1181484
申请日：1984-01-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIMENO AKIRA , KOBAYASHI MORIO , TERUI HIROSHI , KAWACHI MASAO
IPC分类号： H04B10/27 , G02F1/00 , H04B10/00 , H04J14/02 , H04Q3/52 , H04Q11/00

49. 发明专利

JPH04163532A LIGHT CLOCK EXTRACTION CIRCUIT 失效
公开(公告)号：JPH04163532A
公开(公告)日：1992-06-09
申请号：JP28842890
申请日：1990-10-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIMENO AKIRA , TAKAYAMA KOJI , NISHIKIDO ATSUSHI
IPC分类号： G02F2/00 , H04B10/00 , H04B10/556 , H04L7/00
摘要： PURPOSE:To make high speed operation performable and a high frequency light clock extractably by utilizing the injection synchronous phenomenon of a semiconductor laser and extracting a light clock with two semiconductor lasers, a light branch circuit and a light wave circuit. CONSTITUTION:Input light 6 injected into both first and second semiconductor lasers 8, 9 via a light bran circuit 7 draws output light of the first semiconductor laser 8 in its carrier frequency f1 by means of each injection synchronous phe nomenon of these semiconductor lasers 8, 9, and also it draws output light of the first semiconductor laser 8 in the side band frequency of the input light 6, namely, frequency distant as far as clock frequency Df from the carrier frequency f1. These two output light waves are joined together by a light wave circuit 10, but at this time, they interfere with each other, and a difference in the frequencies, that is, a light signal, where light power alternately varies in synchronization with the clock frequency f of the input light 6, namely, a light clock is outputted. With this constitution, high speed operation is made performable, thus the high frequency light clock is extractable.

50. 发明专利

JPS6418109A METHOD AND DEVICE FOR ASSEMBLING HYBRID OPTICAL INTEGRATED CIRCUIT 失效
公开(公告)号：JPS6418109A
公开(公告)日：1989-01-20
申请号：JP17294287
申请日：1987-07-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA YASUBUMI , KOBAYASHI MORIO , HIMENO AKIRA
IPC分类号： G02B6/42 , G02B6/12 , G02B6/122
摘要： PURPOSE:To enable high-accuracy alignment by using a light source having such a wavelength range that an optical function element becomes transparent, guiding light to the optical functioning element and monitoring the rate of optical coupling with an optical waveguide directly. CONSTITUTION:When the optical function element 8 is mounted in the gap for mounting the optical function element 8, etc., which is provided between optical waveguides 71 and 72 formed on a substrate 7, the light source which outputs light in the wavelength range which is transmitted through the optical function element 8 is used. Its output light is inputted to the optical function element 8 through the optical waveguides 71 and 72 and the output light of the optical waveguide 72 which is passed through the optical function element 8 is aligned and fix the optical function element 8 where the intensity of the output light of the optical waveguide 72 is maximum. Consequently, the positioning accuracy is improved, the need to lead an electrode out of the optical function element, and the complexity at the time of hybrid integration is reduced.

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