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1. 发明专利

JP2000330044A OPTICAL SWITCH 失效
公开(公告)号：JP2000330044A
公开(公告)日：2000-11-30
申请号：JP13952999
申请日：1999-05-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOKO HIROYOSHI , SHIMOKAWA FUSAO , SAKATA TOMOMI , MAKIHARA MITSUHIRO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To freely switch an optical path between mutually crossing optical waveguides by making the center line of a groove with two opposing side walls coincide with the internal angle bisector at the intersection of the optical axis center lines of the crossing waveguides. SOLUTION: Optical waveguides 1 cross each other and, at the intersection, a groove 2 is provided having two opposing side walls vertical to the optical waveguides 1. In the groove 2, an index matching liquid 3 is partially sealed such as silicone oil having the same refractive index as that of the core of the optical waveguides 1. With the center line of the groove 2 provided so as to coincide with the internal bisector (ideal reflecting surface 4) at the intersection of the optical waveguides 1, the position of the side walls of the groove 2 is found shifted from the ideal reflection surface 4 by half the width of the groove 2. However, through the Goos-Hanchen effect, the actual reflection surface shifts from the side wall of the groove 2 to the ideal reflection surface 4. Hence, by using this shift, the reflection surface can be set at the position close to the ideal reflection surface 4.

2. 发明专利

JP2001311888A OPTICAL SWITCH 失效
公开(公告)号：JP2001311888A
公开(公告)日：2001-11-09
申请号：JP2000128454
申请日：2000-04-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MAKIHARA MITSUHIRO , SHIMOKAWA FUSAO , SATO MAKOTO
IPC分类号： G02B26/08 , H04Q3/52
摘要： PROBLEM TO BE SOLVED: To prevent an optical switch from malfunctioning due to leak current and varying in a optical characteristic while miniaturizing an optical switch, facilitating production, reducing power consumption, and improved a power efficiency. SOLUTION: In an optical waveguide substrate 15, electric wiring 4a, 4b connect end parts of electric heaters 5 on the same sides with each other, which are arranged in the direction of row of the crossing parts of optical waveguides 3a, 3b arrayed in a matrix form. Upper layer electric wiring 7 connect the electric heaters 5 with each other, which are arranged in the columnar direction of the above crossing parts arrayed in a matrix form, via vertical electric wiring connection bodies 6. An insulating layer 8 insulates the electric wiring 4a, 4b from the electric wiring 7 so that they are not directly connected between them. In a substrate 11, a bypass conduit 12 makes one end of a slit 9 communicate with the other end. A both end open conduit 13 is formed between adjacent elements along the direction of row of the elements, and makes the both ends communicate with the outside. One end of a connection conduit 14 communicates with a slit 9 of each element, the other end communicates with the nearest part to the slit 9 of the both end open conduit 13.

3. 发明专利

JPH06222294A OPTICAL WAVEGUIDE PATH SWITCH 失效
公开(公告)号：JPH06222294A
公开(公告)日：1994-08-12
申请号：JP885493
申请日：1993-01-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHIDA YASUHIDE , KOSHIMOTO YASUHIRO , MAKIHARA MITSUHIRO
IPC分类号： G02B26/08
摘要： PURPOSE:To solve problems such as the evaporation and deterioration of a liquid for switching an optical waveguide path, and provide an optical waveguide path switch keeping a high quality over a long period. CONSTITUTION:In an optical waveguide path switch having a groove 16 for cutting optical wave guide paths 13, 14, 15 vertically to their forming surfaces in the tolerance part of mutually crossing input optical wave directing path 13 and output optical wave directing paths 14, 15, magnetic fluids 23, 24, mercury 21 as a light reflecting fluid, and silicone oil 22 as a light transmitting fluid are inserted into the groove 16 to seal and held the groove 16, and a pair of magnetic circuits 25 and 26, 28 and 29 as magnetic field generating means are arranged near the groove 16.

4. 发明专利

JPH0549055A LIQUID INJECTION AND DISCHARGE TYPE MATRIX OPTICAL WAVEGUIDE SWITCH 失效
公开(公告)号：JPH0549055A
公开(公告)日：1993-02-26
申请号：JP20699391
申请日：1991-08-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MAKIHARA MITSUHIRO , SASAKURA KUNIHIKO , NAGAYAMA AKIRA
IPC分类号： H04Q3/52
摘要： PURPOSE:To improve the reliability of a liquid injection and discharge mechanism and to facilitate the control of liquid quantity by providing a projection to each liquid pool of a matrix optical waveguide switch to relax the positioning accuracy of a liquid injection device. CONSTITUTION:When a liquid 23 is pressed by a pump or the like to inject the liquid 23 to a liquid pool 6, a spherical liquid drop 23a is formed to a tip of a very fine tube 19. The liquid drop 23a is in contact with a projection 7 provided to the liquid pool 6. The liquid drop 23a in contact with the projection 7 is spread over a bottom face of the liquid 6 via the projection 7 by the surface tension and when the liquid 23 is in contact with a side wall of the liquid 6, the liquid is naturally injected in a groove 5 along the side wall. Thus, when the liquid 23 is filled in the groove 5 and the liquid pool 6, an optical signal SI made incident from an optical waveguide 2 for an input optical signal is not reflected in the side wall face of the groove 5 but is transmitted in the groove 5 straightforward. Since the projection 7 in the liquid pool 6 has almost the same height as the surface of the matrix optical waveguide switch 1, the liquid is injected without inserting the very fine tube 19 into the liquid pool 6. Thus, the reliability of the liquid injection and discharge mechanism is improved.

5. 发明专利

JPH04237002A LIQUID INJECTING AND DISCHARGING MECHANISM INTEGRATED WITH SENSOR 失效
公开(公告)号：JPH04237002A
公开(公告)日：1992-08-25
申请号：JP539291
申请日：1991-01-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SASAKURA KUNIHIKO , NAGAYAMA AKIRA , MAKIHARA MITSUHIRO
IPC分类号： G02B6/122 , G02B6/12
摘要： PURPOSE:To provide the liquid injecting mechanism integrated with a sensor which can be positioned at a desired differential point at a high speed with high accuracy and can inject and discharge liquid with high reliability. CONSTITUTION:A reflection pattern 18 embedded in the spacing between matrix optical switches or near the switches is illuminated to image this reflection pattern 18 on a photodetector 15. The liquid is injected and discharged to and from the spacing by a capillary 12 at the center of an objective lens 11 in accordance with this image.

6. 发明专利

JP2003107374A OPTICAL SWITCH 审中-公开
公开(公告)号：JP2003107374A
公开(公告)日：2003-04-09
申请号：JP2001305968
申请日：2001-10-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOKO HIROYOSHI , MAKIHARA MITSUHIRO , SAKATA TOMOMI , SHIMOKAWA FUSAO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide an optical switch having excellent manufacturability and reliability. SOLUTION: An upper substrate is constituted to contain an alkaline ion compound (such as a lithium oxide) and the content of the alkaline ion compound is specified to 1 to 20%. Or an insulative thin film containing the alkaline ion compound (such as the lithium oxide) is formed on a joint surface of the upper substrate with an optical waveguide substrate or a joint surface of the optical waveguide substrate with the upper substrate and the content of the alkaline ion compound is specified to 1 to 20%. The thickness of the insulative thin film is specified to 0.1 to 10 μm. Also, the conductive thin film is formed on the surface facing the joint surface of the upper substrate with the optical waveguide or on the surface facing the joint surface of the optical waveguide with the upper substrate. Or the conductive thin film is formed on a boundary facing the joint surface of the insulative thin film form on the upper substrate with the optical waveguide substrate or the boundary facing the joint surface of the insulative thin film formed on the optical waveguide substrate with the upper substrate.

7. 发明专利

JPH08184771A STAND-BY SYSTEM CHANGEOVER OPTICAL SWITCH AND STAND-BY SYSTEM SWITCHING METHOD FOR OPTICAL SWITCH 失效
公开(公告)号：JPH08184771A
公开(公告)日：1996-07-16
申请号：JP32702994
申请日：1994-12-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHIDA YASUHIDE , MAKIHARA MITSUHIRO , SHIMOKAWA FUSAO , HANAOKA YORIKO
IPC分类号： G02B26/08
摘要： PURPOSE: To provide the optical switch used for the optical path switching of an optical communication system, etc., and the stand-by system switching method for the optical switch. CONSTITUTION: The optical switch consists of an optical waveguide board 61 where vertical grooves 63 (63a to 63h) are formed at respective intersection parts on an optical waveguide core formation surface where plural mutually parallel optical waveguide cores 62 (8 cores 62a to 62h in this example) and one optical waveguide core 64 crossing them are formed and the length directions of waveguide cores in the crossing pairs are mutually in total reflection relation on the wall surface, and liquid supply and discharge means 65 (65a to 65h) which selectively supply and discharge liquid (e.g. silicone oil, holocarbon, glycerin, etc.) having the same refractive index with the optical waveguide cores to and from the grooves 63a to 63h.

8. 发明专利

JPH06300979A OPTICAL PATH CHANGEOVER SWITCH 失效
公开(公告)号：JPH06300979A
公开(公告)日：1994-10-28
申请号：JP8958493
申请日：1993-04-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHIDA YASUHIDE , OHIRA FUMIKAZU , MAKIHARA MITSUHIRO , SHOJI TETSUSHI
IPC分类号： G02B26/08
摘要： PURPOSE:To obtain a small-sized high performance optical path changeover switch which is reduced in connection loss by providing a means which moves one or both of two optical waveguide substrates in parallel to its optical waveguide core formation surface. CONSTITUTION:The optical path changeover switch places electromagnets 28 and 29 in selective operation to attract and move an optical waveguide substrate 23 by generated magnetic fields together with soft magnetic bodies 30 and 31. When the electromagnet 28 is placed selectively in operation, the optical waveguide substrate 23 moves until its flank comes into contact with a positioning pin 26 to connect a waveguide core 24c to a waveguide 24a and a waveguide core 24d to a waveguide 24b. When the electromagnet 29 is selected and placed in operation, the optical waveguide 23 moves until its flank comes into contact with a positioning pin 27 to connect waveguide core 24c to a waveguide 24b. When the electromagnet 28 is selected and placed in operation, the optical waveguide cores 24a and 24b formed on an optical waveguide substrate 22 are positioned having their core center axes coincide with waveguide cores 24c and 24d formed on the optical waveguide substrate 23.

9. 发明专利

JPH04255805A SENSOR BODY TYPE LIQUID INJECTING AND DISCHARGING MECHANISM 失效
公开(公告)号：JPH04255805A
公开(公告)日：1992-09-10
申请号：JP1811091
申请日：1991-02-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGAYAMA AKIRA , SASAKURA KUNIHIKO , MAKIHARA MITSUHIRO
IPC分类号： G02B6/12 , H04Q3/52
摘要： PURPOSE:To decrease the capacity of a sensor body type liquid injecting and discharging mechanism which injects or discharges refractive index matching liquid into and from a matrix optical switch and to secure the reliability for a long time. CONSTITUTION:Light to irradiate a reflection pattern 38 provided to the matrix optical switch 34 is guided to a light absorber 55 which constitutes part of a liquid tank 58 for the refractive index matching liquid and the light absorber is expanded to decrease the internal capacity of the liquid tank 58, thereby injecting refractive index matching liquid which becomes excessive into a liquid reservoir 39 through an extremely thin pipe 29.

10. 发明专利

JP2002090667A LIQUID DRIVE TYPE OPTICAL SWITCH 失效
公开(公告)号：JP2002090667A
公开(公告)日：2002-03-27
申请号：JP2000283787
申请日：2000-09-13
申请人： HITACHI CABLE , NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： ISHIGAMI YOSHIAKI , MURAKAMI KAZUYA , TAMURA KENICHI , MAKIHARA MITSUHIRO , SHIMOKAWA FUSAO , SAKATA TOMOMI , TOKO HIROYOSHI , SATO MAKOTO
IPC分类号： G02B26/08
摘要： PROBLEM TO BE SOLVED: To provide a liquid drive type optical switch which has, no variation in loss. SOLUTION: The wall surface of a groove 5 for optical path switching is coated with a substance 19 having surface tension which is smaller that of than refractive index matching liquid 13. Hence the refractive index matching liquid 13 does not form a thin film on the wall surface of the groove 5 for optical path switching, even if the wall surface is made oil-repellant and air is present in an area 17b for shielding cores 2a and 3a in the groove 5 for optical path switching so that the loss of the optical path will no longer vary.

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