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101. 发明专利

JPS62113107A LIGHT ATTENUATING PLATE 失效
公开(公告)号：JPS62113107A
公开(公告)日：1987-05-25
申请号：JP25264385
申请日：1985-11-13
申请人： FUJITSU LTD
发明人： KUSAKA SATOSHI , NODA HIDEKI
IPC分类号： G02B5/28 , G02B5/00
摘要： PURPOSE:To obtain a light attenuating plate having desired dependency of attenuation on wavelength by forming a multilayered dielectric film on one side of a substrate having a light attenuating film on the front side so as to correct the dependency of attenuation of the resulting light attenuating plate on wavelength. CONSTITUTION:Both sides of a glass substrate (BK-7) 1 are polished and cleaned, a Ti film 2 is deposited as a 10 dB light attenuating film on one side of the substrate 1 with an electron beam vapor deposition apparatus, and a TiO2 film 3, an SiO2 film 4, a TiO2 film 5 and an SiO2 film 6 are successively deposited on the other side to form a multilayered dielectric film. This dielectric film may be formed on the light attenuating film or the light attenuating film may be formed on the multilayered dielectric film. The attenuation characteristics of the light attenuating film can be evaluated by comparing the intensity of light of a specified wavelength received after passing through the film with the intensity of such light received without passing through the film and by continuously varying the wavelength.

102. 发明专利

JPS61267730A POLARIZATION COUPLER 失效
公开(公告)号：JPS61267730A
公开(公告)日：1986-11-27
申请号：JP10961185
申请日：1985-05-22
申请人： FUJITSU LTD
发明人： KUSAKA SATOSHI , NODA HIDEKI
IPC分类号： G02B27/28
摘要： PURPOSE:To attain a sufficient quenching ratio with simple constitution without precise control for film formation by arranging polarized light separating films between both the slant faces of a diamond prism and the slant faces of triangular prisms arranged oppositely to the diamond prism. CONSTITUTION:A polarization coupler has the triangular prism 3 stacked on one slant face of the diamond prism 2 and a polarized light separating film 4 and a P-polarized wave is attenuated twice by said components. The polarized light separation degree characteristics for an S-polarized wave of a polarized light separating film 5 in such an apparatus are expressed by the simple reduction of attenuation in accordance with the increase of wavelength and are not easily influenced by the accuracy of film formation. On the other hand, the polarized light separation degree characteristics of the P-polarized wave are sharply changed by the accuracy of the film formation and it is difficult to secure >30dB attenuation in a required wavelength range. Thus, the addition of the film 4 and the prism 3 makes it possible to secure the attenuation of the P-polarized wave sufficiently and attain a sufficient quenching ratio.

103. 发明专利

JPS6066212A OPTICAL DEMULTIPLEXER 失效
公开(公告)号：JPS6066212A
公开(公告)日：1985-04-16
申请号：JP17456783
申请日：1983-09-21
申请人： FUJITSU LTD
发明人： NODA HIDEKI , KUSAKA SATOSHI , HOTSUTA MIKIO , FURUTA YOUSUKE
IPC分类号： G02B6/293 , G02B6/34
摘要： PURPOSE:To simplify the constitution and to reduce the cost by constituting an optical demultiplexer with a demultiplexer main body, which has a function to separate a multiplexed light to lights different in wavelengths, and an optical device which has a function to increase the crosstalk attenuation. CONSTITUTION:An optical fiber 1 through which a multiplexed light having wavelengths lambdaa and lambdab is projected to a demultiplexer main body 10 is set to one side wall of a demultiplexer main body case 12 through a condenser lens 8. An optical fiber 2a to which the light having the wavelength lambdaa which is transmitted through a filter film 11 and is separated is made incident is set to the side face facing the optical fiber 1 through another condenser lens 8. An optical fiber 3a to which the light having the wavelength lambdab is made incident is set to a side wall of the demultiplexer main body case 12 in a prescribed direction. The filter film 11 is set to the bottom plate of the demultiplexer main body case 12. This filter film 11 is a simple transmission filter which permits the light having the wavelength lambdaa to transmit through and reflects the light having the wavelength lambdab to separate it. Thus, the constitution is simplified and the cost is reduced.

104. 发明专利

JPS59226309A STICKING STRUCTURE OF OPTICAL TRANSMISSION PATH PARTS 失效
公开(公告)号：JPS59226309A
公开(公告)日：1984-12-19
申请号：JP10107783
申请日：1983-06-07
申请人： FUJITSU LTD
发明人： ASANUMA KAZUYUKI , NODA HIDEKI
IPC分类号： G02B6/32 , G02B6/24 , G02B6/38 , G02B7/00 , G02B7/26
摘要： PURPOSE:To improve the reliability of optical coupling by forming the surface of an adjusting plate into a convex surface and forming the surface of a supporting plate into a concave surface and sticking the adjusting plate to the supporting plate after the optical axis of optical transmission path parts to a desired angle with both surfaces. CONSTITUTION:A convex surface 15a is brought into contact with a concave surface 14 and is slidden to a desired contacting face to make it easy that the axis of optical transmission path parts 17, to which an adjusting plate 15 is set, and that of a through hole 13 of a supporting plate 8 intersect with each other at a selected angle. That is, the adjustment of an angular deviation alpha is easy. After the angular deviation is adjusted in this manner, taper washers 11 are applied to top seats, and machine screws 10 are engaged with them, thus sticking optical transmissin path parts 17 to the supporting plate 8.

105. 发明专利

JPS5960304A Optical fiber locator 失效
标题翻译：光纤定位器
公开(公告)号：JPS5960304A
公开(公告)日：1984-04-06
申请号：JP17198682
申请日：1982-09-30
申请人： Fujitsu Ltd , Tohoku Electric Power Co Inc
发明人： ISHIHATA YOSHINORI , SHIKAYAMA KAZUYOSHI , OOTSUKA FUJIO , HOTSUTA MIKIO , NODA HIDEKI , FURUTA YOUSUKE
IPC分类号： G01B11/00
CPC分类号： G01B11/00
摘要： PURPOSE:To improve measurement precision and to widen a measurement range by connecting respective data groups obained by taking measurements over the entire area of an optical fiber together at boundary points among respective measurement areas. CONSTITUTION:A changeover switch 2 is connected to its terminal (x) by receiving a clock signal from a clock part 1. In this case, a pulse width selecting circuit 3 generates a narrow pulse and a corresponding light pulse from a laser diode 6 is sent from a coupler 5 to the optical fiber 6. Light reflected by the optical fiber 6 is sent to the coupler 5 and an avalanche photodiode 7 to eliminate noises, etc., and thus the light is digitized. The obtained waveform data is stored in a memory 12a. Then, the switch is connected to a terminal (y) to send out a wide pulse. In this case, the resolution decreases slightly, but the measurable distance is extended and waveform data is stored in a memory 12b. Then, the switch is connected to a terminal (z) to send out a wider pulse and a measurement is taken to further distance to store waveform data in a memory 12c. Those obtained waveform data are concatenated together by a data concatenation processing part 13 and processed to obtain waveform data on the entire area of the optical fiber 14 through a display part 14.
摘要翻译：目的：为了提高测量精度，并通过连接相应的数据组来扩大测量范围，通过在各个测量区域之间的边界点在光纤的整个区域上进行测量。构成：转换开关2通过从时钟部分1接收时钟信号而连接到其端子（x）。在这种情况下，脉冲宽度选择电路3产生窄脉冲，并且来自激光二极管6的对应的光脉冲是从耦合器5发送到光纤6.由光纤6反射的光被发送到耦合器5和雪崩光电二极管7以消除噪声等，从而数字化光。获得的波形数据被存储在存储器12a中。然后，开关连接到端子（y）以发出宽脉冲。在这种情况下，分辨率稍微降低，但是可测量的距离被扩展并且波形数据被存储在存储器12b中。然后，开关连接到端子（z）以发出更宽的脉冲，并且进行测量以进一步距离以将波形数据存储在存储器12c中。所获得的波形数据由数据级联处理部分13连接在一起，并通过显示部分14处理以获得光纤14的整个区域上的波形数据。

106. 发明专利

JPS583433A LIGHT BEAM CONTROLLING SYSTEM FOR COMMUNICATION 失效
公开(公告)号：JPS583433A
公开(公告)日：1983-01-10
申请号：JP10185581
申请日：1981-06-30
申请人： FUJITSU LTD
发明人： HOTSUTA MIKIO , ASANUMA KAZUYUKI , NODA HIDEKI , FURUTA YOUSUKE
IPC分类号： H04B10/00 , G02B7/28 , H04B10/07 , H04B10/112
摘要： PURPOSE:To correct a shift of the optical path of an optical beam with a simple operation for a communication system which performs the transmission of information by propagating the optical beam in a space, by displacing the optical path after detecting a shift of the light receiving position. CONSTITUTION:The optical beam transmitted from a transmitting side 1 is condensed through a lens 7 and then received at a receiving side through a half mirror 21. The light beam branched to the upper part by the mirror 21 is received by a control photodetector 22. Then the receiving position of the light beam is detected the photodetectors which are arranged 7X7 for example. The inserting position is decided by a microprocessor 23 for the prisims 19-0 and 19-1 so that the shift of the optical path of the light beam based on a detecting signal given from the photodetector 22. Based on this decision, the two prisms 19-0 and 19-1 are shifted.

107. 发明专利

JPS5587104A PHOTO SWITCH 失效
公开(公告)号：JPS5587104A
公开(公告)日：1980-07-01
申请号：JP15914478
申请日：1978-12-26
申请人： FUJITSU LTD
发明人： ISHIKAWA TAKASHI , TERAI SEIJI , KURITA SHIYOUICHI , OOYA TOSHIO , NODA HIDEKI
IPC分类号： G02B26/08 , G02B6/35 , G02B27/10
摘要： PURPOSE:To make changing-over operation of the switch stable by forming the guide grooves of the number equal to the number of stationary fibers to the circumferential edge of a rotatably mounted plate cam and pressing the end of the movable optical fiber to its circumferential edge by a pressing device. CONSTITUTION:The switch is constituted by a plate cam 10 which is mounted rotatably by a pulse motor 20, a movable optical fiber 30 which is pressed to the circumferential edge 11 of said plate cam by a pressing member consisting of a spring 22 and a contactor 23 and a plurality of stationary fibers 31 to be coupled to said movable optical fiber. Guide grooves 12 of the number equal to the number of the stationary optical fibers 31 are formed to the circumferential edge 11 of the plate cam 10. The end part of the movable fiber 30 is alwys held pressed via the contactor 23 to the circumferential edge 11 of the plate cam 10 in the A direction by the spring 22. Hence, even if the movable optical fiber 30 is engaged with the guide groove 12 corresponding to the stationary optical fibers 31 by the rotation of the plate cam 10, it does not vibrate, thus the phenomenon that the light signal leaks occasionally does not occur and the changing-over operation of the switch may be made stable.

108. 发明专利

JPS5581306A PHOTO SWITCH 失效
公开(公告)号：JPS5581306A
公开(公告)日：1980-06-19
申请号：JP15419378
申请日：1978-12-15
申请人： FUJITSU LTD
发明人： ISHIKAWA TAKASHI , TERAI SEIJI , KURITA SHIYOUICHI , OOYA TOSHIO , NODA HIDEKI
IPC分类号： G02B26/08 , G02B6/35
摘要： PURPOSE:To achieve easier working and assembling and less number of coil windings and drive current by making the armature holding a movable optical fiber oscillatable about a statinary pin as a fulcrum. CONSTITUTION:The other end of the body 14 which is wound with a coil (magnetism generator) 12 on its outside circumference, is provided in a capsule 11 provided with magnets 13, 13' at one end and is fixed at one end with stationary optical fibers 17, 17' by way of support plates 16, 16' is mounted with the armature 10 holding a movable optical fiber 18, oscillatably by way of a pin 20. If with this arrangement the drive current is supplied to the coil 12 to energize the armature 19 and the armature is moved toward one of the magnetic pole plates 15, 15', then the end part 18a of the movable optical fiber 18 is connected to one of the stationary optical fibers 17, 17', whereby switching of the circuits is accomplished. Since the armature 19 is oscillatable by way of the pin 20, the force required for oscillating the same can be smaller and the intended object is achieved.

109. 发明专利

JPS5559785A LIGHT EMITTING SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPS5559785A
公开(公告)日：1980-05-06
申请号：JP13224678
申请日：1978-10-27
申请人： FUJITSU LTD
发明人： TERAI SEIJI , MITA FUMIO , NODA HIDEKI , OOYA TOSHIO , KURITA SHIYOUICHI
IPC分类号： G02B6/42 , H01L33/58 , H01L33/60
摘要： PURPOSE:To provide a monitoring light of a light emitting semiconductor device by fixing an optical fiber through a photoconductor to a package and preferably maintaining the light output transmission efficiency to a transmisstion line optical fiber. CONSTITUTION:A semiconductor light emitting element 101 such a light emitting diode, semiconductor laser or the like is disposed in a package 102. A pipe-like photoconductor 106 to which part of the output light from the element 101 is projected incident to one end thereof is formed at the other end thereof in oblique reflecting surface 109, and an optical fiber 105 is inserted fixedly into the semiconductor 106. Accordingly, the optical fiber 105 is fixed through the semiconductor 106 to the package 102 to thereby readily seal itself accurately.

110. 发明专利

JP2000341213A GAIN ADJUSTMENT DEVICE WITH TEMPERATURE COMPENSATION FUNCTION AND OPTICAL AMPLIFIER 失效
公开(公告)号：JP2000341213A
公开(公告)日：2000-12-08
申请号：JP14669399
申请日：1999-05-26
申请人： FUJITSU LTD
发明人： NODA HIDEKI
IPC分类号： H01S3/06 , G02B6/00 , G02B6/02 , H01S3/067 , H01S3/10 , H04B10/25 , H04B10/2507 , H04B10/294 , H04J14/00 , H04J14/02 , H04B10/02 , G02B6/10 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To provide a gain adjustment device that has a temperature compensation function flexibly coping with a gain wavelength characteristic changing depending on ambient temperature and to provide a small-sized optical amplifier with a simple configuration that can realize a stable gain wavelength characteristic over a wide temperature range. SOLUTION: This gain adjustment device is provided with an optical transmission line L consisting of a plurality of long period fiber gratings (LPG) 1, 2 that have different loss wavelength characteristics and different temperature dependence on the respective loss wavelength characteristic. The characteristics of the LPG 1, 2 are set in response to the gain wavelength characteristic and its temperature dependence of the optical amplifier. Thus, the gain is automatically compensated in response to the temperature characteristic.

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