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1. 发明专利

JPH07198968A TERMINAL STRUCTURE OF PARALLEL COATED FIBERS OF MULTIPLE OPTICAL FIBER CABLE 失效
公开(公告)号：JPH07198968A
公开(公告)日：1995-08-01
申请号：JP35419693
申请日：1993-12-28
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： HAYAKAWA KOICHI , OTA IKUO , HASEMI AKIO , SHIMIZU MASANOBU , TOMITA NOBUO , SENDA KAZUNORI
IPC分类号： G02B6/30 , G02B6/04
摘要： PURPOSE:To provide a terminal structure of parallel coated fibers of multiple optical fiber cable without making an operation to recombine optical fibers after connection of a directional coupler. CONSTITUTION:A parallel integrating part 5 where a first optical fiber paralleling part 3 arranged and fixed with the first optical fibers 1 and a second optical fiber paralleling part 4 arranged and fixed with the second optical fibers 2 are superposed on each other is provided with a converting part 6 on its one end side. The first and second optical fibers 1, 2 are separated and recombined by the converting part 6 and are converted in arrangement in such a manner that the first optical fibers 1 and the second optical fibers 2 are alternately arranged. The converting part 6 is provided with a cover 26 to protect the converting part 6.

2. 发明专利

JPH0843669A OPTICAL FIBER TYPE COUPLER AND ITS PRODUCTION 失效
公开(公告)号：JPH0843669A
公开(公告)日：1996-02-16
申请号：JP18139494
申请日：1994-08-02
申请人： FURUKAWA ELECTRIC CO LTD
发明人： FURUKAWA KOICHI , SHIMIZU MASANOBU , HASEMI AKIO
IPC分类号： G02B6/28
摘要： PURPOSE:To miniaturize an optical transmission and reception module and to obtain an optical fiber type coupler by forming an optical branching and coupling part so as to have wavelength selectability with emission optical fibers fo three directions. CONSTITUTION:This optical fiber type coupler 1 in which the optical branching and coupling part 3 to which three pieces of the optical fibers 2 stretched by fusing under heating to branch light in three directions are attached, is formed. The optical branching and coupling part 3 described above has the wavelength selectability with the emission optical fibers of three directions. One central piece amoung the emission optical fibers of the three directions allows selective transmission of a wavelength of a lambda1 band and the other two pieces on both sides allow selective transmission of the wavelength of a lambda2 band so as not to allow transmission of the wavelength of the other bands. Namely, the optical fiber type coupler 1 is formed to have a coupling length at which one light signal of the wavelength of the band lambda1 is outputted from an exit port B2 and the light signal of the wavelength of the band lambda2 attains zero when the light signals of the wavelength of the lambda1, lambda2 of the incident light are made incident from the incident port A1. In such a case, the coupler has the coupling length at which the one light signal of the wavelength of the band lambda2 is outputted from the exit ports B1, B2 and the light signal of the wavelength of the band lambda1 becomes zero.

3. 发明专利

JPS6315216A OPTICAL ISOLATOR 失效
公开(公告)号：JPS6315216A
公开(公告)日：1988-01-22
申请号：JP16059786
申请日：1986-07-08
申请人： FURUKAWA ELECTRIC CO LTD
发明人： MIYAGI MITSUNOBU , NISHIDA SHIGEO , SHIMIZU MASANOBU , HIRATANI YUJI
IPC分类号： G02B27/28 , G02F1/09
摘要： PURPOSE:To eliminate the need for adjustment by consisting all of the polarizer, analyzer and Faraday rotating element provided to a substrate of sealed porous oxide films made of alumina. CONSTITUTION:The polarizer 24, the Faraday rotating element 25 and the analyzer 26 are formed by forming the porous oxide films on the prescribed faces of the aluminum substrate by an anodic oxidation method and sealing the porous oxide films. The porous oxide films 31 which consist of upper porous layers 32 and barrier layers 33 around the same and, the porous layers 32 of which has the structure consisting of hexagonal columnar cells 35 having fine pores 34 in continuation to a plane shape are obtd. when the prescribed face of the aluminum substrate 21 is anodized to form alumina on said face. The polarizer 24 and the analyzer 26 are, therefore, obtd., by sealing the pores 34 of the porous oxide films 31 by a metallic sealing material. The Faraday rotating element 25 is obtd. when the films are sealed by the sealing material such as heavy flint glass or lead glass which is the Faraday rotating element. The need for the adjustment is thereby eliminated and the reduction of the size cost, etc., is satisfied.

4. 发明专利

JPS62103532A METHOD FOR CALIBRATING OPTICAL FIBER RADIATION THERMOMETER 失效
公开(公告)号：JPS62103532A
公开(公告)日：1987-05-14
申请号：JP24436585
申请日：1985-10-31
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU MASANOBU , UMEKI HAJIME
IPC分类号： G01J5/00 , G01J5/08
摘要： PURPOSE:To enable calibration without performing the mounting and detachment of an optical connector, by transmitting the light from a calibrating light source through an optical fiber to reflect the same from the reflector arranged in front of a detection head and receiving the reflected light by the optical fiber to transmit the same so as to be incident on a detection part. CONSTITUTION:The light generated from a calibrating light source 10 is condensed by a condensing lens 17 to reach a half mirror 18 and reflected from said mirror 18 to be incident on an optical fiber 11 and transmitted to a condensing head 13 and emitted through a lens 19. The emitted light is reflected by a reflector 14 and condensed by the lens 19 to be received by the optical fiber 11 and transmitted to be emitted from the emitting end 20 of said optical fiber 11 and passes through the half mirror 18 to be incident on a light detector 22 while being condensed by a condensing lens 21. This incident light is converted to an electric signal by the detector 22 and said electric signal is converted to temp. by a signal processing circuit 23. By this method, even if no connector is used, the optical fiber can be connected to the calibrating light source 10.

5. 发明专利

JPS58105026A TEMPERATURE MEASUREMENT UTILIZING LIGHT GUIDE 失效
公开(公告)号：JPS58105026A
公开(公告)日：1983-06-22
申请号：JP20249181
申请日：1981-12-17
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU MASANOBU , TANAKA TAKASHI , TAKABAYASHI TSUNEHISA
IPC分类号： G01J5/00 , G01J5/08 , G08C23/04
摘要： PURPOSE:To precisely measure temperature of an object to be measured deflecting during running like a running linear substance, by a method wherein an incident end of an optical fiber is arranged in a rectangle, and a radiation heat temperature is measured using a light guide focused so as to bring an emitting end into a round shape. CONSTITUTION:A radiation heat from a radiating part 8 of an object 7 to be measured is caused to enter an incident end surface 1 of a light guide 5 through a lens 9, and light of a radiation heat transmitted to an emitting end surface 6 is caused to enter a photo detector 11 via a lens 10 to detect a radiation temperature. The light guide 5 comprises a number of optical fibers 12, and the incident end surface 1 is formed in an oblong by aligning in two rows incident ends 13 so that the ends lengthen in the deflecting direction of the object 7 to be measured. This enables a quantity of heat to be kept in a constant manner even if the radiation heat enters any position of an upper part 2, a center part 3, and a lower part 4 of the incident end surface 1 as a result of the lateral deflection of the object 7 to be measured. The emitting end surface 6 of the light guide 5 focuses the emitting end in a disordered manner to form it into a circle.

6. 发明专利

JPH07128551A OPTICAL SEMICONDUCTOR STEM 失效
公开(公告)号：JPH07128551A
公开(公告)日：1995-05-19
申请号：JP29409993
申请日：1993-10-28
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU MASANOBU , WAKIZAKA TAKESHI , FURUKAWA KOICHI
IPC分类号： G02B6/42 , H01L31/0232 , H01L33/48 , H01L33/00
摘要： PURPOSE:To provide the optical semiconductor stem which is easily assembled to an optical semiconductor module and features excellent coupling efficiency and low cost. CONSTITUTION:The optical semiconductor stem which is installed with a supporting plate 2 for fixing a light emitting element 6 on the front surface side of a planar stem body 1 and is provided with lead pins 4 on the rear surface side of the stem body 1 is provided with a through-hole (optical fiber fixing part) 3 to be fixed with the coated optical fiber 9 to be optically coupled to the light emitting element 6 at the prescribed point of the supporting plate 2. The fixing of the light emitting element 6 and the coated optical fiber 9 on the same supporting plate 2 in proximity to each other is possible and, therefore, the good coupling efficiency is obtd. without lenses. Since the coated optical fiber 9 is directly fixed to the through-hole 3 without using a ferrule, optical axis alignment is rapidly and exactly executed. There is no need for the lenses and ferrules and the stem is of a can type and, therefore, the cost therefor is low.

7. 发明专利

JPH07128071A OPTICAL MODULE 失效
公开(公告)号：JPH07128071A
公开(公告)日：1995-05-19
申请号：JP29427693
申请日：1993-10-29
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU MASANOBU , FURUKAWA KOICHI , WAKIZAKA TAKESHI
IPC分类号： G01C19/72 , G02B6/00 , G02B6/42 , H01L31/12
摘要： PURPOSE:To provide an optical module in which a light emitting element and a light receiving element are integrated. CONSTITUTION:A light emitting element 1 emitting a signal light, a light guide end part 19 of an optical fiber for transmitting the signal light, a light receiving element 8 for receiving a light returning back to the light emitting element 1 side through the optical fiber 5, and a beam splitter 14 for guiding the returning light to the light receiving element 8 by converting the optical path are housed in a package 6 thus constituting an optical module 10. The beam splitter 14 is formed by cutting the forward end part of the optical fiber 5 obliquely and then depositing gold on the inclining face. The signal light emitted from the light emitting element 1 is transmitted through the optical fiber 5 and the returning light is guided to the light receiving element 8 by converting the optical path through the beam splitter 14.

8. 发明专利

JPH024538B2 失效
公开(公告)号：JPH024538B2
公开(公告)日：1990-01-29
申请号：JP2539382
申请日：1982-02-19
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU MASANOBU , TAKABAYASHI TSUNEHISA , SHIBUYA SEIJI , SATO TSUGIO
IPC分类号： C03B37/012 , G02B6/00 , G02B6/024

9. 发明专利

JPS6321581A MAGNETIC FIELD SENSOR AND ITS MANUFACTURE 失效
公开(公告)号：JPS6321581A
公开(公告)日：1988-01-29
申请号：JP16609686
申请日：1986-07-15
申请人： FURUKAWA ELECTRIC CO LTD
发明人： MIYAGI MITSUNOBU , NISHIDA SHIGEO , SHIMIZU MASANOBU , HIRATANI YUJI
IPC分类号： G01R33/032
摘要： PURPOSE:To obtain a small and inexpensive magnetic field sensor, by forming a polarizer and Faraday rotation element on the same aluminum substrate to eliminate the need for adjustment such as optical axis matching. CONSTITUTION:A magnetic field sensor has a polarizer 1 and a Faraday rotation element 2 on the same aluminum substrate 6 and an analyzer 3 is provided on the substrate 6 as required. In the production method, pores are formed on the substrate 6 by anode oxidation and a part thereof are sealed with metal to make a polarizer 1 while the other thereof are sealed with a Faraday rotation material to make an element 2. The other pores may be sealed with metal as required to form the analyzer 3 on the substrate 6. Thus, the polarizer 1, the element 2 and the analyzer 3 are formed on one substrate 6 to eliminate the need for optical axis adjustment or the like thereby achieving the ease of handling.

10. 发明专利

JPS6029619A LIGHT DETECTING METHOD 失效
公开(公告)号：JPS6029619A
公开(公告)日：1985-02-15
申请号：JP13824983
申请日：1983-07-28
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KACHI SUMIO , SHIMIZU MASANOBU , KIMURA MASAKI
IPC分类号： G01J1/00 , G01J5/52
摘要： PURPOSE:To execute a measurement with a high accuracy by using a part having the same temperature as an infrared detecting element, as a reference light source, in the infrared detecting element and its circumference which are held at a prescribed temperature. CONSTITUTION:A radiated infrared light from an object to be measured 1 is transmitted by an optical fiber 2, and it is intermitted by a light intermitting body 5 and made incident to an infrared detecting element 4 through a lens 3. The light intermitting body 5 is constituted so that a part which is in the infrared detecting element 4 and its circumference, and in the same temperature area as said detecting element forms an image, and an infrared light radiated from this image is used as a reference light. The infrared detecting element 4 detects alternately the raidated infrared light from the object to be measured 1 and the reference light through the light intermitting body 5, and the infrared light radiated from the object to be measured 1 is detected from a difference of both lights.

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