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31. 发明专利

JPH10239547A OPTICAL WAVEGUIDE AND OPTICAL PARTS, AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH10239547A
公开(公告)日：1998-09-11
申请号：JP3954197
申请日：1997-02-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATTORI KUNINORI , MORIWAKI KAZUYUKI , ABE ATSUSHI
IPC分类号： G02B6/13 , G02B6/12 , H01P5/00
摘要： PROBLEM TO BE SOLVED: To make the polarization dependency dissoluble in the composite spectral characteristics of an optionally designed array waveguide type diffraction grating, by providing an ion-implated layer at a core bottom face part using an ion implantation. SOLUTION: After a lower clad layer 2 is provided on a plane substrate 1, an ion-implanted layer 3 is formed on the lower clad layer 2 by an ion implantation. After a core layer 4 is provided on the ion-implanted layer 3, a core part 5 is formed by etching, and an upper clad layer 6 is formed on the ion- implanted layer 3 and the ore part 5 to embed the core part 5. The change of the stress field near core glass or the change of a refractive index of the ion implanted layer 3 is therefore induced to obtain an optical waveguide and optical parts with polarization dependency. Since the ion implanted layer 3 is formed being embedded in glass, nonpolarizing action can be maintained semipermanently. Furthermore, since the ion implanted layer 3 formed by the ion-implantation is optically homogeneous glass, there is no possibility of the ion implanted layer 3 causing the loss and extinction ratio degradation of the optical waveguide.

32. 发明专利

JPH10123341A OPTICAL WAVEGUIDE AND ITS PRODUCTION 失效
公开(公告)号：JPH10123341A
公开(公告)日：1998-05-15
申请号：JP27821696
申请日：1996-10-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATTORI KUNINORI , MORIWAKI KAZUYUKI , OMORI YASUJI
IPC分类号： G02B6/122 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To obtain practicable optical circuits integrated with waveguides of quartz glass and silicon on the same substrate by closely and serially connecting quartz glass optical waveguide parts having core part and clad parts both composed of quartz glass and silicon optical waveguide parts having the core parts comprising silicon and the clad parts comprising quartz glass, thereby forming the optical waveguides. SOLUTION: This optical waveguide is constituted by closely and serially connecting the quartz glass optical waveguide parts and the silicon optical waveguide parts on a silicon substrate 1. The quartz glass optical waveguide parts comprise the rectangular cores 6, the lower clads 5 arranged on the bases of the cores 6 and the upper clads 7 arranged on the flanks and front surfaces of the cores 6. The cores 6 and the clads 5, 7 are formed of the quartz glass. On the other hand, the silicon optical waveguide parts exist above silicon terrace structure parts. The cores 4 formed of the silicon consist of the rib structures in which the lower clad quartz systems are enclosed by the quartz glass layers 2 and the quartz glass 7 on the flanks and front surfaces of the cores 4.

33. 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.

34. 发明专利

JPH09211240A OPTICAL WAVEGUIDE WITH PHASE ADJUSTING FUNCTION AND ITS MANUFACTURE 失效
公开(公告)号：JPH09211240A
公开(公告)日：1997-08-15
申请号：JP1517096
申请日：1996-01-31
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： GO TAKASHI , HATTORI KUNINORI , OKAZAKI HISAAKI , OMORI YASUJI
IPC分类号： G02B6/12 , G02F1/01
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide with a phase adjusting function which has high mechanical strength and has a partially thermal insulating structure by a simpler method and a process for producing the same. SOLUTION: This optical waveguide with the phase adjusting function has a clad layer 2 formed on a substrate, a core part 3 embedded into the clad layer 2 and a phase adjusting heater 4 for adjusting the optical path length disposed on the core part 3. The substrate is a composite substrate formed by combining plural materials 1, 5 varying in thermal conductivity. The core part 3 is arranged on the material 5 having the relatively low thermal conductivity of the composite substrate.

35. 发明专利

JPH06183751A PRODUCTION OF OPTICAL WAVEGUIDE FILM 失效
公开(公告)号：JPH06183751A
公开(公告)日：1994-07-05
申请号：JP34007592
申请日：1992-12-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHUDO KEIZO , KITAGAWA TAKESHI , HATTORI KUNINORI
IPC分类号： G02B6/13 , C03B8/04 , C03B19/14 , C03B20/00 , G02B6/12
摘要： PURPOSE:To obtain an optical waveguide film useful for an optical amplifier and laser by carrying out film formation by plasma CVD with a quartz glass to which an org. compd. of a rare earth element has been added. CONSTITUTION:When a rare earth element-added quartz glass film is formed, an org. compd. of the rare earth element is used as starting material for adding the rare earth element and film formation is carried out by plasma CVD to obtain the objective optical waveguide film. A beta-diketone compd. represented by the formula (where X is a rare earth element and each of R and R' is an alkyl) may be used as the org. compd. Silance (SiH4) or an org. compd. of silicon such as tetraethoxysilane as a silicon source and pure oxygen or nitrous oxide (N2O) as oxygen source are suitable for use as starting materials for the quartz glass film. This optical waveguide film preferably contains P, Al, etc., as constituents because it is used for an optical amplifier and laser.

36. 发明专利

JPH05291658A 失效
公开(公告)号：JPH05291658A
公开(公告)日：1993-11-05
申请号：JP9119492
申请日：1992-04-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KITAGAWA TAKESHI , HORIGUCHI MASAHARU , HATTORI KUNINORI , SHUDO KEIZO , OGUMA MANABU
IPC分类号： G01J3/26 , G02B6/12 , G02B6/122 , G02B27/28 , H01S3/06 , H01S3/08 , H01S3/083
摘要： PURPOSE:To obtain a structure of a single longitudinal mode optical-waveguide type laser which has excellent controllability of oscillation wavelength and a wide frequency variable range, by providing a ring resonator provided with an optical isolator, and Fabry-Perot interferometers having a specific light transmission band. CONSTITUTION:A plane substrate has on it a ring resonator 14 consisting of an optical-waveguide 12 to whose part rate earth ions of at least more than one kind are added. The ring resonator 14 is provided with an optical isolator 16, and Fabry-Perot interferometers 15 having a narrower light transmission band than a longitudinal mode frequency gap of the ring resonator 14. Therefore, highly stable oscillation operation of a single longitudinal mode laser is made possible at light transmitting frequencies of Fabry-Perot interferometers which are set to an optical wavelength within the 1.5mum band. Particularly, polarization of single laser oscillation light is made possible by arranging an optical isolator having much dependence on polarization in an appropriate direction.

37. 发明专利

JPH05291656A 失效
公开(公告)号：JPH05291656A
公开(公告)日：1993-11-05
申请号：JP9119292
申请日：1992-04-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KITAGAWA TAKESHI , OGUCHI TAISUKE , HATTORI KUNINORI , SHUDO KEIZO , OGUMA MANABU
IPC分类号： H01S3/083 , H01S3/06 , H01S3/10 , H01S3/106
摘要： PURPOSE:To make possible laser oscillation, and to make it possible to select easily oscillation wavelength, by using a plurality of wavelength in a specific wavelength band. CONSTITUTION:A ring laser resonator 14 is provided on a plane substrate by an optical waveguide to whose part rare earth ions are added. In the ring laser resonator 14 is provided a wavelength selecting element 15 consisting of an optical path switch 22 for shifting more than two optical paths 23-1, 2,...n, and a narrow band transmitting filter 24-1, 2,...n which transmit light of specific wavelength. Therefore, laser oscillation occurs by the transmitting wavelength o the narrow band transmitting filter 24, and an oscillation wavelength can be selected by shifting the oscillation wavelength.

38. 发明专利

JPH0462525A OPTICAL AMPLIFIER 失效
公开(公告)号：JPH0462525A
公开(公告)日：1992-02-27
申请号：JP17276590
申请日：1990-07-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATTORI KUNINORI , KITAGAWA TAKESHI , OMORI YASUJI
IPC分类号： G02B6/12 , G02F1/35 , H01S3/06 , H01S3/07
摘要： PURPOSE:To allow integration and miniaturization by forming the optical amplifier so as to have a light introducing part which is gradually decreased in waveguide, an optical amplifying part which is narrow in the waveguide width and a light taking out part which is gradually increased in the waveguide width and adding a rare earth element to at least a part of the clad part enclosing the core part of the optical amplifying part. CONSTITUTION:A glass film for a core layer is first produced by a flame deposition method on an Si substrate 1. The narrow optical waveguide 5 is produced by etching on this glass film. The clad part 5a added with Er is formed around the narrow optical waveguide part 5. Signal light and stimulating light propagate to the narrow optical waveguide 5 via the light introducing part 4 of the tapered part by passing the optical waveguide 3 which has the ordinary waveguide and is not added with the Er. The signal light and stimulating light bleed out to the upper clad part added with the Er from the side wall of the core. The intensity of the signal light is then amplified by the inversion distribution and derived release of the Er. The amplified light propagates through the light taking out part 4a of the tapered part again to the optical waveguide 3a which has the ordinary waveguide width and is not added with the Er.

39. 发明专利

JPH0371115A OPTICAL CIRCUIT FOR LIGHT AMPLIFICATION 失效
公开(公告)号：JPH0371115A
公开(公告)日：1991-03-26
申请号：JP20693789
申请日：1989-08-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIBINO YOSHINORI , KITAGAWA TAKESHI , SUZUKI SENTA , HATTORI KUNINORI , SHIMIZU MAKOTO , YAMADA MAKOTO
IPC分类号： G02B6/122 , G02B6/12 , G02F1/35 , H01S3/06
摘要： PURPOSE:To obtain a light amplifying optical circuit capable of guaranteeing integration and stable operation by using a plane type quartz glass waveguide formed on a substrate consisting of Si or the like and unitedly forming an amplifying medium and a multiplexing/demultiplexing optical circuit. CONSTITUTION:The quartz glass waveguide to which Er is added is used to constitute the optical circuit for multiplexing/demultiplexing pump light and signal light and the amplifying waveguide on the same substrate 9. In order to drive an optical amplifier utilizing the optical circuit, an output from a pump light LDla and signal light propagated through an optical fiber 3a are respectively made incident upon the ports A, B of a directional coupler I. Since the coupling efficiency values of the pump light and the signal light in the directional coupler are 99% and 0%, both of them are transmitted to a port C. Thereby, the signal light and the pump light are transmitted through the Er-added optical waveguide after the port C, and during the period, the signal light is amplified. Then the pump light is separated from the signal light by a direction coupler II utilizing the same principle as the directional coupler I and the signal light is measured by a photodetector 5a.

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