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1. 发明专利

JPS57207219A PRODUCTION OF POLARIZATION CANCELLATION CIRCUIT 失效
公开(公告)号：JPS57207219A
公开(公告)日：1982-12-18
申请号：JP9149781
申请日：1981-06-16
申请人： NIPPON TELEGRAPH & TELEPHONE , OUYOU KOUDEN KENKIYUUSHITSU KK
发明人： FUJII YOUJI , SARUWATARI MASATOSHI , MINOWA JIYUNICHIROU , ITOU TOMOYUKI , AOSHIMA KENJI
IPC分类号： G02B27/28
摘要： PURPOSE:To facilitate manufacture by constituting a polarization cancellation circuit by using two pieces of trapezoidal blocks which are constituted by adhering parallelogram prisms and rectangular prisms. CONSTITUTION:Parallelogram prisms 10, 11 and rectangular prisms 8, 9 having prescribed shapes are manufactured, and multilayered dielectric films S1, S2 are formed on the surfaces inclusive of hypotenuses of the prisms 8, 9 and the surfaces of the prisms 10, 11 corresponding to said surfaces, then these are adhered together, whereby trapezoidal blocks having the effect of polarization splitters are manufactured. Such trapezoidal blocks are pressed and set on a base plate by facing the surfaces including the bottoms of the trapezoidal blocks on the basis of a rectangular parallelepiped block set on said base plate, and the one trapezoidal block is placed along the rectangular parallelepiped block, whereby the blocks are positioned and set.

2. 发明专利

JPS5616104A DIFFRACTION GRATING TYPE OPTICAL BRANCHING FILTER 失效
公开(公告)号：JPS5616104A
公开(公告)日：1981-02-16
申请号：JP9238079
申请日：1979-09-19
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIKAWA SHIGETA , DOI KIKUO , MINOWA JIYUNICHIROU , FUJII YOUJI
IPC分类号： G02B6/293 , G02B6/34 , G02B6/38
摘要： PURPOSE:To match the center wave length of a branching filter to the wave length of a light source with a high precision, by converging again beams which are obtained by diffracting outputs of plural optical fibers, which are arranged in parallel through the V groove plate formed by etching of silicon single crystal, by a diffraction grating to parallel fibers through a lens. CONSTITUTION:V groove plate 14 is produced by chemical etching of a silicon plate, and arrangement part 15 of plural optical fibers is formed, and optical fiber cords 16-20, connector 21, holder 22, and box body 23 are provided. End faces of optical fiber strands 16-1-20-1 are placed at the focus of lens 2, and the light emitted from end faces becomes parallel beams 6-8 by lens 2 and is diffracted by diffraction grating 1. The diffracted light is converged to end faces of optical fiber strands 16-1-20-1 again by lens 2. By setting the interval of V grooves properly, the center wave length of the branching filter can be matched to the wave length of the light source with a high precision.

3. 发明专利

JPS5292537A VARIABLE ATTENUATOR FOR PHOTO FIBERS 失效
公开(公告)号：JPS5292537A
公开(公告)日：1977-08-04
申请号：JP788376
申请日：1976-01-29
申请人： NIPPON TELEGRAPH & TELEPHONE , OUYOU KOUDEN KENKIYUUSHITSU KK
发明人： HASHIMOTO KUNIO , FUJII YOUJI , AOSHIMA KENJI , ITOU TOMOYUKI
IPC分类号： G02B6/00 , G02F1/13 , G02F1/17
摘要： PURPOSE:To improve the accuracy by using a liquid crystal in which a dynamic scattering occurs as a fluid core of photo fibers.

4. 发明专利

JPS60186810A OPTICAL STAR COUPLER 失效
公开(公告)号：JPS60186810A
公开(公告)日：1985-09-24
申请号：JP4310384
申请日：1984-03-07
申请人： NIPPON TELEGRAPH & TELEPHONE , MITSUBISHI ELECTRIC CORP
发明人： FUJII YOUJI , OGUCHI KIMIO , ITOU TAKASHI , NAKAGUCHI TOMOYUKI , NAKAMURA TAKESHI
IPC分类号： G02B6/28
摘要： PURPOSE:To uniformize output optical signals, by forming a mixer to be connected between an inputting fiber array which inputs optical signals and outputting fiber array which outputs optical signals in a quadrangular prism having a paralleogramic base. CONSTITUTION:An input section 4 is formed with an optical connector 1, optical fiber 1, and fiber array 2 and an output section 9 is formed in the same way with a fiber array 6, optical fiber 8, and optical connector 7, and a mixer 5 is connected between the input section 4 and output section 9. The mixer 5 is formed in a quadrangular prism having a paralleogramic base and inclined side faces 26 and 26, with a core section 11, parallel clad layers 24 and 24, and inclined clad layers 25 and 25. Moreover, the dimension between the core section 11 and another core section 11 is set thinner than the diameter of the core of an optical fiber to be connected. Therefore, the intensity distribution of light at the end face of the output side can be uniformized and, at the same time, the intensity of distributed optical signals at the output side is made stronger.

5. 发明专利

JPS5683034A MANUFACTURE OF ONE DIMENTIONAL ARRAY TYPE ELEMENT 失效
公开(公告)号：JPS5683034A
公开(公告)日：1981-07-07
申请号：JP15924779
申请日：1979-12-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI , MINOWA JIYUNICHIROU
IPC分类号： H01L21/306 , H01L25/075 , H01L27/14 , H01L33/48
摘要： PURPOSE:To make individual elements to be one dimentional array type with high accuracy by a method wherein reversed stand type grooves of which the shape of sectional area having the prescribed angles are formed by anisotropic etching on the Si substrate, and blocks are adhered to the bottom faces of groove. CONSTITUTION:Protective films 5 for etching are provided at the prescribed interval on the (112) Si substrate as shown in the figure looking from the (110) direction, and anisotropic etching is performed with KOH aqueous solution, etc., to form the reversed stand type grooves having a vertical side wall and another wall crossing with the bottom face at 160 deg. angles. Blocks of glass, metal, etc., are adhered to the flat bottom faces of the grooves, and light emitting elements, etc., are mounted on the blocks to produce the one dimentional array. Because the positioning of the elements can be performed accurately by this way, so that the one dimentional array type elements having high accuracy can be obtained.

6. 发明专利

JPS55133004A PRODUCTION OF NONPLANE DIFFRACTION GRATING 失效
公开(公告)号：JPS55133004A
公开(公告)日：1980-10-16
申请号：JP4051779
申请日：1979-04-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI , MINOWA JIYUNICHIROU
IPC分类号： G02B5/18
摘要： PURPOSE:To readily and surely manufacture the nonplane diffraction grating by etching the silicon single crystal base body whose etching rate is aniostropic to the crystal faces to form the plane grating of the specified section and suction-affixing the same on a nonplane base body. CONSTITUTION:When masks 14 are provided at every required pitch of the plane 21 of the silicon single crystal base body 24 formed by the main plane 21, side plane 23, etc. When this base body is etched, the plane diffraction grating form body 28 whose section is of an inverted triangle shape because of the etching rate being anisotropic to the crystal planes and which is provided with the grooves 27... for grating of inner side faces 26L, 26R is formed. This grating form body 28 is placed on a base body 50 for supporting the nonplane diffraction grating set on the base table 40 connected to an exhaust means 42 and is bonded by means of vacuum suction and adhesive agent, whereby the nonplane diffraction grating is readily and surely manufactured without using any precision grating groove die, etc.

7. 发明专利

JPS5512955A OPTICAL FIBER CONNECTOR WITH MONITOR CIRCUIT 失效
公开(公告)号：JPS5512955A
公开(公告)日：1980-01-29
申请号：JP8596578
申请日：1978-07-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI , MINOWA JIYUNICHIROU
IPC分类号： G02B6/24 , G02B6/28 , G02B6/42 , H01L31/0232
摘要： PURPOSE:A solar cell is incorporated into a V groove type connector, and obliquely cut glass fibers are connected in its V groove, thus providing a simultaneous monitor and connection. CONSTITUTION:A solar cell 7 consisting of silicon layer 1 and a silicon substrate 2 and a V groove plate 3 are combined to form a V groove connector. In its V groove, optical fibers 6, 6' having obliquely cut cross section are connected in straight. Light beam (a) passing through the optical fiber 6 is devided at the cross section S into the transmitted light b and reflected light c. The reflected light c is detected by the solar cell 7 to monitor the light (a).

8. 发明专利

JPS5412611A CODE CONVERSION SYSTEM 失效
公开(公告)号：JPS5412611A
公开(公告)日：1979-01-30
申请号：JP7838177
申请日：1977-06-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI , AOYAMA SATORU , MIKI TETSUYA
IPC分类号： H03M5/08 , H04B1/00 , H04L7/00 , H04L7/02 , H04L25/49
摘要： PURPOSE:To eliminate the DC component and thus to facilitate an easy regeneration of the clock through a simple circuit, by supplying the binary signal ofan optional code system and the clock signal of period T and providing a conversion part which delivers the pulses of different pulse durations alternately and oppositely with every generation of 1 or 0 of the binary code.

9. 发明专利

JPS53133478A OPTICAL WATTMETER 失效
公开(公告)号：JPS53133478A
公开(公告)日：1978-11-21
申请号：JP4788877
申请日：1977-04-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI , KOYAMA MASAKI
IPC分类号： G01J1/42 , G01J1/44
摘要： PURPOSE:To remove noise by modurating the light to be measured and taking out only the modulated signal components through an active filter or by synchronous detection.

10. 发明专利

JPS53133458A VARIABLE ATTENUATOR FOR OPTICAL FIBERS 失效
公开(公告)号：JPS53133458A
公开(公告)日：1978-11-21
申请号：JP4788677
申请日：1977-04-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOUJI
IPC分类号： G02B6/00 , G05D25/00
摘要： PURPOSE:To perform attenuation highly accurately with a small constitution by controlling reflectance with the applied voltage from the outside by using electrochromism as core of optical fibers.

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