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公开(公告)号：JPS59107675A
公开(公告)日：1984-06-21
申请号：JP21670882
申请日：1982-12-10
Applicant: Nec Corp
Inventor： KONDOU MITSUKAZU , NAGASHIMA KUNIO
CPC classification number: H04Q11/0005 , H04Q2011/002
Abstract: PURPOSE:To miniaturize the exchange by an optical switch connected to a semiconductor laser operating bistably between an input optical waveguide and an output optical waveguide and a current drive circuit so as to set optionally the length of a frame exchanged by the exchange of a time division optical signal. CONSTITUTION:A switch 320 for write and a switch 330 for readout are provided between an input optical waveguide 310 inputting a time division optical signal 100 and an output optical wavguide 380 outputting a time division optical signal 190. Semiconductor lasers 340, 350, 360, 370 operating bistably are connected between an output side of the respective switch 320 and the input side of the switch 330 via an optical waveguide, and current drive circuits 345, 355, 365, 375 injecting respectively a bias current are connected to the lasers 340, 350, 360 and 370. Further, each of the switches 320, 330 is driven respectively by optical switch driving circuits 321, 331, the length of the frame exchanged by the exchange is set optionally and the exchange is miniaturized.
Abstract translation: 目的：通过连接到输入光波导和输出光波导之间双向运行的半导体激光器的光开关和电流驱动电路来使交换小型化，以便可选地设置通过时分交换交换的帧的长度 光信号。 构成：在输入时分光信号100的输入光波导310和输出时分光信号190的输出光波导380之间，设置用于写入的开关320和用于读出的开关330.半导体激光器340,350,360， 370分别经由光波导连接在相应开关320的输出侧和开关330的输入侧之间，分别注入偏置电流的电流驱动电路345,355,365,375被连接到激光器340， 此外，开关320,330中的每一个分别由光开关驱动电路321,331驱动，可选地设置由交换机交换的帧的长度，并且交换被小型化。
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公开(公告)号：JPS58215632A
公开(公告)日：1983-12-15
申请号：JP9882082
申请日：1982-06-09
Applicant: Nec Corp
Inventor： KONDOU MITSUKAZU
CPC classification number: G02F1/313 , G02F1/3132 , G02F3/00
Abstract: PURPOSE:To perform switching with low crosstalk with 0-1 volt by coupling (n-1) optical waveguides with one optical waveguide mutually different coupling points. CONSTITUTION:One input optical waveguide 32 and four output optical waveguides 33-36 are installed on a dielectric or semiconductor substrate 1 and optical directional couplers 40-43 having mutual close light transmission directions are constituted successively between the optical waveguide 32 and four optical waveguides 33-36; and control electrodes 44-47 are arranged on those optical directional couplers. Then, only the control electrode of an optical directional coupler constituted between inpt and output optical waveguides to be connected mutually is held at 0V, and the other control electrode is applied with a voltage V'. When the amount of coupling is zero, low crosstalk is obtained easily without any influence of the asymmetry of the optical waveguides. Therefore, switching with low crosstalk is carried out between 0 and 1volt.
Abstract translation: 目的：通过耦合（n-1）光波导与一个光波导相互不同的耦合点来执行具有0-1伏的低串扰的切换。 构成：一个输入光波导32和四个输出光波导33-36安装在电介质或半导体基板1上，并且具有相互接近的光传输方向的光定向耦合器40-43依次构成在光波导32与四个光波导33之间 -36; 并且控制电极44-47布置在那些光学定向耦合器上。 然后，仅将互相连接的输入光波导之间构成的光学定向耦合器的控制电极保持在0V，另一个控制电极施加电压V'。 当耦合量为零时，容易获得低串扰，而不影响光波导的不对称性。 因此，低串扰的切换在0和1V之间进行。
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3.发明专利
公开(公告)号：JPS59116708A
公开(公告)日：1984-07-05
申请号：JP23162082
申请日：1982-12-24
Applicant: Nec Corp
Inventor： KOMATSU YOSHIROU , KONDOU MITSUKAZU
CPC classification number: G02B6/30
Abstract: PURPOSE:To provide a simple connecting method between a waveguide type optical element and incident and exit optical fibers for retaining plane of polarization by interposing single mode fibers of a specific length between the waveguide type optical element and the optical fibers for retaining plane of polarization. CONSTITUTION:Four incident single mode fibers 2 are connected on the end faces of the four incident light waveguides of a waveguide type optical switch 12, and four exit single mode fibers 10 are connected to the end faces of the four exit light waveguides. The respective fibers 2, 10 are linear, and the length Z thereof is maintained at Z
Abstract translation: 目的：为了提供波导型光学元件与入射光纤和出射光纤之间的简单连接方法，用于通过在波导型光学元件和光纤之间插入特定长度的单模光纤以保持偏振平面，从而保持极化平面。 构成：四路入射单模光纤2连接在波导型光开关12的四个入射光波导的端面上，四个出射单模光纤10连接到四个出射光波导的端面。 相应的纤维2,10是线性的，并且其长度Z保持在Z <= 0.20 / DELTAbeta，以便通过使用其中相对于任选的两个极化的传播常数差异的光纤2,10来透射光波 相互垂直相交的波浪是DELTAbeta弧度/米，并保持相同的消光比为-20dB。 因此，当TM或TE的任一模式的光波入射到用于保持偏振平面的光纤1时，当光波到达4X4波导型入射端面时，TM或TE的模式被保持 光开关。
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公开(公告)号：JPS5945423A
公开(公告)日：1984-03-14
申请号：JP15545682
申请日：1982-09-07
Applicant: Nec Corp
Inventor： KONDOU MITSUKAZU
CPC classification number: G02F3/00 , G02F1/313 , G02F1/3132
Abstract: PURPOSE:To make a matrix optical switch operatable with a low voltage, by providing a control electrode near each optical directional coupler and applying a prescribed voltage of the control electrode of a prescribed optical directional coupler. CONSTITUTION:Optical waveguides 31 and 32 constituting the first optical waveguide group and optical waveguides 33 and 34 constituting the second optical waveguide group are formed on a dielectric or semiconductor substrate 1. Optical waveguides 31 and 32 constitute an optical directional coupler 41, and optical waveguides 33 and 34 constitute an optical coupler 44, and optical directional couplers 42 and 43 are constituted on both sides of optical directional couplers 41 and 44 by optical waveguides 32 and 33. Control electrodes are provided on respective optical directional couplers. Thus, switching is possible with a voltage value between 0 volt and 1 volt, and a low crosstalk is attained easily, and the optical switch is made operatable with a low voltage.
Abstract translation: 目的：通过在每个光学定向耦合器附近提供控制电极并施加规定的光学定向耦合器的控制电极的规定电压，使矩阵光开关可以低电压工作。 构成：构成第一光波导组的光波导31,32和构成第二光波导组的光波导33,34形成在电介质或半导体基板1上。光波导31,32构成光定向耦合器41，光波导 33和34构成光耦合器44，并且光学定向耦合器42和43由光波导32和33在光学定向耦合器41和44的两侧构成。控制电极设置在相应的光学定向耦合器上。 因此，可以在0伏特和1伏特之间的电压值进行切换，并且容易实现低串扰，并且光开关可以用低电压操作。
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公开(公告)号：JPS59168414A
公开(公告)日：1984-09-22
申请号：JP4348183
申请日：1983-03-16
Applicant: Nec Corp
Inventor： KONDOU MITSUKAZU
CPC classification number: G02F1/3132
Abstract: PURPOSE:To obtain an optical switch which operates at a low voltage by installing a light reflector in an optical waveguide which connects optical switch elements together. CONSTITUTION:Optical waveguides 12-17 are formed on a substrate 10 of lithium niobate crystal (LiNbO3) by a Ti diffusion method, and the optical waveguides 12 and 13, 15 and 16, and 17 are put close at about several mum distances to form directional photocouplers; and control electrodes are installed on the optical waveguides constituting the photocouplers to form directional coupling type optical switch elements 21, 22, and 23. The optical waveguides 12 and 13 after running through the optical switch element 21 are bent at right angles by a reflector 24 formed by cutting a groove in the LiNBO3 substrate 10 and connected to the optical waveguides 18 and 19 respectively, and further bent at right angles by reflectors 25 and 26 and then connected to the optical waveguides 15 and 17. The reflectors 25 and 26 have flanks perpendicular to the substrate surface in the substrate 10 as well as the reflector 14 and are formed of thin grooves of several - tens of mum in width slanting to the optical guides 18 and 19 at 45 deg..
Abstract translation: 目的：通过在将光开关元件连接在一起的光波导中安装光反射器来获得在低电压下工作的光开关。 构成：通过Ti扩散法在铌酸锂晶体（LiNbO 3）的衬底10上形成光波导12-17，并且将光波导12,13,15和16和17靠近约几个距离形成 定向光电耦合器; 并且控制电极安装在构成光电耦合器的光波导上，以形成定向耦合型光开关元件21,22和23.在穿过光开关元件21的光波导12和13之间通过反射器24直角弯曲 通过在LiNBO 3衬底10中切割并分别连接到光波导18和19并且通过反射器25和26进一步弯曲成直角并且然后连接到光波导15和17而形成。反射器25和26具有侧面 垂直于衬底10中的衬底表面以及反射器14，并且由宽度为数十个的宽度的细槽形成为在45度处向光导18和19倾斜的宽度。
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Patent Agency Ranking
公开(公告)号：JPS5953817A
公开(公告)日：1984-03-28
申请号：JP16564082
申请日：1982-09-22
Applicant: Nec Corp
Inventor： NAGASHIMA KUNIO , KONDOU MITSUKAZU
CPC classification number: G02F1/295
Abstract: PURPOSE:To maintain the loss in each connection route constant by adjusting each switch of an optical switch array which connects any one of N-pieces of optical fiber cables to the other one optical fiber cable. CONSTITUTION:Optical fiber cables are selectively connected by using a waveguide type optical switch array consisting of the 1st- the 4th input optical waveguides 102, 104, 106, 108 which are connected at one end to the output ends of the 1st- the 4th input optical fiber cables 100, 103, 105, 107, an output optical waveguide 110 which contacts at one end with the input end of an output optical fiber cable 109 and is provided in proximity with the above-described 1st-4th input optical waveguides, the 1st- the 4th waveguide type optical switches 111, 112, 113 and 114 provided in the proximate parts of the respective input optical waveguides and the output optical waveguide, and the 1st- the 4th driving circuits 119, 120, 121, 122 of which the output terminals are connected respectively to control electrodes 115, 116, 117 and 118 of the respective switches.
Abstract translation: 目的：通过将连接任何一条N型光纤电缆的光开关阵列的每个开关调到另一根光纤电缆，以保持每个连接路径的损耗。 构成：通过使用由第一至第四输入光波导102,104,106,108组成的波导型光开关阵列选择性地连接光纤电缆，第一至第四输入光波导102,104,106,108一端连接到第一至第四输入端的输出端 光纤电缆100,103,105,107，一端与输出光纤电缆109的输入端接触并设置在上述第1〜第4输入光波导附近的输出光波导110， 第一至第四波导型光开关111,112,113和114设置在相应的输入光波导和输出光波导的邻近部分中，以及第一至第四驱动电路119,120,121,122，其中 输出端子分别连接到相应开关的控制电极115,116,117和118。
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7.发明专利Method for extracting information signal on the way of optical transmission line 失效在光传输线路上提取信息信号的方法
公开(公告)号：JPS59211339A
公开(公告)日：1984-11-30
申请号：JP8528983
申请日：1983-05-16
Applicant: Nec Corp
Inventor： FUJIWARA MASAHIKO , KONDOU MITSUKAZU , OOTA YOSHINORI
CPC classification number: H04B10/2507
Abstract: PURPOSE:To decrease inertion losses and to quicken the response speed by inserting an active waveguide path having P-N junction in an optical transmission line and amplifying propagated light with a forward bias normally to extract the optical signal as an electric signal at a reverse bias. CONSTITUTION:Laser light 1 for signal transmission is coupled with the active waveguide device 3 having the P-N junction via an optical system 2. In applying a forward bias across the P-N junction of the waveguide path 3, the laser light 1 is amplified and irradiated from the waveguide path 3 ad irradiated light 4. On the other hand, in applying a reverse bias across the waveguide path 3, the laser light 1 is absorbed while being travelled through the active waveguide path 3 and extracted externally as a light current. Thus, the light is amplified and irradiated to the next stage or the light is extracted as the electric signal by changing over the bias state of the waveguide path 3 in this way.
Abstract translation: 目的：通过将具有P-N结的有源波导路径插入到光传输线中并通过正向偏置正常放大传播的光以减少光信号作为反向偏压的电信号，来降低衰减损耗并加快响应速度。 构成：用于信号传输的激光1与经由光学系统2的具有PN结的有源波导器件3耦合。在波导路径3的PN结上施加正向偏压时，激光1被放大并从 波导路径3照射光4.另一方面，在波导路径3上施加反向偏压时，激光1在行进通过有源波导路径3的同时被吸收并作为光电流从外部提取。 因此，通过以这种方式改变波导路径3的偏置状态，光被放大并照射到下一级，或者通过改变波导路径3的偏置状态来提取光作为电信号。
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公开(公告)号：JPS59211023A
公开(公告)日：1984-11-29
申请号：JP8529283
申请日：1983-05-16
Applicant: Nec Corp
Inventor： FUJIWARA MASAHIKO , KONDOU MITSUKAZU , OOTA YOSHINORI
CPC classification number: H01S3/063
Abstract: PURPOSE:To obtain an information signal as an electric signal in a branch to be connected, by reverse-biasing only an active waveguide corresponding to an output branch to be connected of an lX(m) optical switch, and forward-biasing the remaining waveguides. CONSTITUTION:Active waveguides (20a, 20c) (20b, 20d) corresponding to the number of output branches are placed in front of two input optical transmission lines 3a, 3b, respectively. In case each active waveguide is all biased in the forward direction, an optical signal outputted from the input light transmission line is amplified by each active waveguide and transmitted as a light. The active waveguide 20c, 20b are connected to reverse-biasing circuits 25a, 25b provided with a photoelectric detecting system, and when other active waveguides 20a, 20d are biased in the forward direction, the optical signal from the input light transmission line 3a is amplified by the active waveguide 20a, and made incident to the active waveguide 20c, but is absorbed in its waveguide, and a photocurrent is obtained in an output branch 8b by the reverse-biasing circuit 25b.
Abstract translation: 目的：通过反向偏置仅与一个lX（m）光开关连接的输出分支相对应的有源波导，并且将剩下的波导进行正向偏置来获得要连接的分支中的电信号作为电信号的信息信号 。 构成：对应于输出分支数量的有源波导（20a，20c）（20b，20d）分别放置在两个输入光传输线3a，3b的前面。 在每个有源波导全部向正方向偏置的情况下，从输入光传输线输出的光信号被每个有源波导放大并作为光传输。 有源波导20c，20b连接到设置有光电检测系统的反向偏置电路25a，25b，当其它有源波导20a，20d向正方向偏置时，来自输入光传输线3a的光信号被放大 通过有源波导20a并入射到有源波导20c，但被吸收在其波导中，并且通过反向偏置电路25b在输出支路8b中获得光电流。
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公开(公告)号：JPS59210414A
公开(公告)日：1984-11-29
申请号：JP8354083
申请日：1983-05-13
Applicant: Nec Corp
Inventor： KOMATSU YOSHIROU , KONDOU MITSUKAZU
CPC classification number: G02B6/105
Abstract: PURPOSE:To perform polarization compensation which is stable to the polarization state of single-mode fiber projection light by splitting incident light into two orthogonal linear polarized components, and rotating only one component and then multiplexing both components after passing them through optical paths differing in length. CONSTITUTION:A light wave projected from a single-mode fiber 1 is split into two mutually orthogonal linear polarized components by birefringent crystal 3, and they are coupled with polarization maintaining fibers 4 and 5 respectively. The polarization maintaining fibers 4 and 5 has some difference in fiber length so that two light waves do not interfere with each other when multiplexed by a light guide type Y-shaped multiplexer 6 while only one linear polarized component is rotated by 90 deg.. In this case, axes of polarization are so adjusted that both components propagating in the polarization maintaining fibers 4 and 5 are multiplexed efficiently on the incidence light guide 7 of the light guide type Y- shaped multiplexer 6.
Abstract translation: 目的：通过将入射光分为两个正交线性偏振分量来执行对单模光纤投影光的偏振状态稳定的偏振补偿，仅旋转一个分量，然后在两个分量通过长度不同的光路后将其复用 。 构成：通过双折射晶体3将从单模光纤1投影的光波分为两个相互正交的线偏振分量，分别与偏振保持光纤4和5耦合。 偏振维持光纤4和5在光纤长度上具有一些差异，使得当仅由一个线性偏振分量旋转90度时，由光导型Y形多路复用器6复用时两个光波彼此不会相互干扰。 在这种情况下，偏振轴被调整为使得在保偏光纤4和5中传播的两个分量在光导型Y形多路复用器6的入射光导7上有效地复用。
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公开(公告)号：JPS5953818A
公开(公告)日：1984-03-28
申请号：JP16564182
申请日：1982-09-22
Applicant: Nec Corp
Inventor： NAGASHIMA KUNIO , KONDOU MITSUKAZU
CPC classification number: H04Q11/0005 , H04Q2011/0049 , H04Q2011/0052
Abstract: PURPOSE:To eliminate the variance with the losses in connection routes by providing plural loss provision means between an optical input terminal group and the plural input terminals of an optical switch array and between an optical output terminal group and the plural output terminals of the optical switch array. CONSTITUTION:There are thin metallic film layers 200-205 of a prescribed length on input-output waveguides and directional coupling type optical switches 306-308, 318-320 as optical loss provision means provided in order to solve the difficulty in the loss distribution in the stage of designing optical fiber network as the insertion losses vary with the routes to be selectively connected on account of difficulty in maintaining the constant connection losses Lci, L'cj between an optical fiber cable and an optical waveguide. When the light signal propagating in the optical waveguide is of a TM mode wave, the loss generated by the thin metallic film is large and therefore the large variance with the loss is compensated.
Abstract translation: 目的：通过在光输入端子组和光开关阵列的多个输入端之间以及在光输出端组与光开关的多个输出端之间提供多个损耗提供装置来消除连接路径损耗的变化 阵列。 构成：在输入输出波导和定向耦合型光开关306-308,318-320上有规定长度的薄金属膜层200-205，作为光损耗提供装置，为了解决损耗分布的困难， 考虑到难以维持光纤电缆和光波导之间的恒定连接损耗Lci，L'cj，插入损耗的设计阶段由于插入损耗而变化。 当在光波导中传播的光信号是TM模波时，由金属薄膜产生的损耗大，因此与损耗的大差异被补偿。
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