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    OPTICAL WAVEGUIDE AND ARRAYED WAVEGUIDE GRATING
    41.
    发明公开
    OPTICAL WAVEGUIDE AND ARRAYED WAVEGUIDE GRATING 有权
    光波导体和波导光栅布置

    公开(公告)号：EP2579076A4

    公开(公告)日：2013-04-10

    申请号：EP11786477

    申请日：2011-05-10

    Applicant: NTT ELECTRONICS CORP

    Inventor： MORITA KEIICHI ,  SHIMIZU KAZUMI ,  KAWASHIMA KOUJI ,  NIITSU TOMOHARU

    IPC: G02B6/12

    CPC classification number: G02B6/12014 ,  G02B6/12011 ,  G02B6/2813 ,  G02B6/29344

    Abstract: The present invention provides a technique that does not increase the circuit size, does not make the circuit design and manufacturing difficult, and can reduce insertion loss when light enters from a slab waveguide toward an arrayed waveguide or when the light enters from the arrayed waveguide toward the slab waveguide. The invention provides an optical waveguide provided with a slab waveguide 1 in which a grating GP is formed therein at a distance from an end, and an arrayed waveguide 2 whose end is connected to an end of the slab waveguide 1 at a position where a constructive interference portion of a self-image SP of the grating GP is formed. The invention provides an arrayed waveguide grating provided with a first input/output waveguide, the above-mentioned optical waveguide where an end of the slab waveguide 1 on the opposite side of the arrayed waveguide 2 is connected to an end of the first input/output waveguide, a second slab waveguide connected to an end of the arrayed waveguide 2 on the opposite side of the slab waveguide 1, and a second input/output waveguide connected to an end of the second slab waveguide on the opposite side of the arrayed waveguide 2.

    DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD
    43.
    发明公开
    DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD 审中-公开
    DIGITALESÜBERTRAGUNGSSYSTEMUND DIGITALESÜBERTRAGUNGSVERFAHREN

    公开(公告)号：EP2106051A4

    公开(公告)日：2011-06-22

    申请号：EP08703294

    申请日：2008-01-16

    Applicant: NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

    Inventor： KISAKA YOSHIAKI ,  OHARA TAKUYA ,  AISAWA SHIGEKI ,  MIYAMOTO YUTAKA ,  TAKEI KAZUHITO ,  ENDOH YASUYUKI ,  MIURA KATSUYOSHI ,  NIKAIDO TADANOBU ,  TOMIZAWA MASAHITO

    IPC: H04J3/00 ,  H04L1/00 ,  H04L29/08

    CPC classification number: H04J3/1664 ,  H04J3/07 ,  H04J3/14 ,  H04J2203/0085 ,  H04J2203/0089

    Abstract: A digital transmission system having at least a client device and a transmission device and rate-adjusting a client signal transmitted from the client device to the transmission device as necessary, to accommodate/multiplex the signal in a frame, is provided. The transmission device has a rate adjusting unit and a framer processing unit. The rate adjusting unit encapsulates the client signal using a predetermined frame structure, and inserts an idle pattern, as necessary, to perform rate adjustment to a bit rate that can be accommodated in the frame. The framer processing unit accommodates/multiplexes the signal into the frame after the rate adjustment. The digital transmission system accommodates, or accommodates and multiplexes, a bit string of the client signal directly in a payload portion, accommodates, or accommodates and multiplexes, the bit string in the payload portion after subjecting it to a reversible digital signal processing.

    Abstract translation: 提供一种数字传输系统，其至少具有客户端设备和传输设备，并且根据需要对从客户端设备传输到传输设备的客户端信号进行速率调整，以适应/复用帧中的信号。 发送装置具有速率调整单元和成帧器处理单元。 速率调整单元使用预定的帧结构来封装客户端信号，并且根据需要插入空闲模式，以对可以容纳在帧中的比特率执行速率调整。 成帧器处理单元在速率调整之后将信号容纳/复用到帧中。 数字传输系统在经过可逆数字信号处理之后，直接在有效载荷部分中容纳或容纳和复用客户端信号的位串，容纳或复用有效负载部分中的位串。

    PHASE COMPARATOR CIRCUIT
    45.
    发明公开
    PHASE COMPARATOR CIRCUIT 有权
    PHASENVERGLEICHSSCHALTUNG

    公开(公告)号：EP1233568A4

    公开(公告)日：2006-02-01

    申请号：EP01974775

    申请日：2001-10-11

    Applicant: NTT ELECTRONICS CORP

    Inventor： TAKEO YASUHITO ,  TOBAYASHI MASATOSHI ,  HIROSE MASAKI ,  AKAZAWA YUKIO

    IPC: H03D13/00 ,  H03L7/085 ,  H04L7/033 ,  H03K5/26 ,  H03L7/08

    CPC classification number: H03L7/085 ,  H03D13/008 ,  H04L7/0331

    Abstract: A phase comparator circuit that compares the phases of random NRZ signals in a phase synchronizing circuit without losing greatly the synchronism when the same-sign data is inputted and has a phase conversion characteristic of high linearity when the phases are brought in synchronism. The function of preventing the phase synchronizing circuit from greatly losing synchronism is realized by using a phase comparator circuit of a circuit structure as shown by equations (1), (2), for example, a phase comparator circuit having the structure shown in Figure 11. Since the duty ratio of the pulse appearing at the output terminal (3) of a multiplier circuit (62) approaches 50% as the phases approach their synchronized state, the phase conversion characteristic does not distort, thereby realizing high linearity of the phase conversion characteristic when the phases are in synchronism.

    Abstract translation: 提供一种相位检测器电路，其在CID输入期间（连续相同位）防止锁定的显着损失，并且在比较随机NRZ信号的相位的操作中具有相位锁定点周围的相电压转换特性的高线性度 一个阶段 通过使用具有由公式（1）或（2）表示的电路结构的相位检测器电路，例如，图1所示的电路结构。 如图11所示，可以实现防止锁定显着损失的PLL电路的能力。 此外，由于接近乘法器电路62的输出端子3处的脉冲的占空比接近50％，因此不会出现相电压转换特性的失真，高线性度 可以实现锁相点周围的相电压转换特性。

    OPTICAL WAVEGUIDE AND ARRAYED WAVEGUIDE GRATING
    46.
    发明公开
    OPTICAL WAVEGUIDE AND ARRAYED WAVEGUIDE GRATING 审中-公开

    公开(公告)号：EP2657735A4

    公开(公告)日：2018-01-24

    申请号：EP11851216

    申请日：2011-09-26

    Applicant: NTT ELECTRONICS CORP

    Inventor： MORITA KEIICHI ,  SHIMIZU KAZUMI ,  KAWASHIMA KOJI

    IPC: G02B6/12 ,  G02B6/293

    CPC classification number: G02B6/12014 ,  G02B6/12011 ,  G02B6/29344 ,  G02B6/34

    Abstract: This invention provides an optical waveguide which does not increase the circuit size, does not make difficult the circuit design and manufacturing, and can reduce insertion loss when light enters from a slab waveguide toward an arrayed waveguide or when the light enters from the arrayed waveguide toward the slab waveguide. This optical waveguide is provided with a slab waveguide 1 in which a grating GP or GA is formed, an arrayed waveguide 2 connected to a position where a constructive interference portion of a self-image of the grating GP or GA is formed, and a refractive index change region DV which is formed between the slab waveguide 1 and the arrayed waveguide 2, in which an average value of a refractive index in a refractive index distribution in a direction substantially vertical to a light propagation direction is averagely increased from the slab waveguide 1 toward the arrayed waveguide 2, and in which an average value of the refractive index in a refractive index distribution in a direction substantially parallel to the light propagation direction is increased at a central axis of the arrayed waveguide 2.

    OPTICAL COMPONENT
    47.
    发明公开
    OPTICAL COMPONENT 审中-公开
    OPTISCHE KOMPONENTE

    公开(公告)号：EP2546686A4

    公开(公告)日：2017-07-12

    申请号：EP11753050

    申请日：2011-03-09

    Applicant: NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

    Inventor： ISHII MOTOHAYA ,  OOBA NAOKI ,  SENO KAZUNORI ,  DOI YOSHIYUKI ,  TSUZUKI KEN ,  FUKUMITSU TAKAO ,  MURASAWA ATSUSHI ,  EBISAWA FUMIHIRO ,  TERUI HIROSHI ,  SHIBAZAKI TOMOYO ,  KIKUCHI YUICHI

    IPC: G02B6/26 ,  G02B6/12 ,  G02B6/122 ,  G02B6/30 ,  G02B6/35 ,  G02B6/36

    CPC classification number: G02B6/12009 ,  G02B6/12033 ,  G02B6/30 ,  G02B6/3508 ,  G02B6/3616

    Abstract: Degradation in an optical characteristic attributed to thermal stress and mechanical external force is suppressed in an optical component that a part of a waveguide type optical device is fixed to a convex portion of a mount. First and second optical device support bases (301, 302), opposed to each other, are fixed to a second waveguide type optical device (202) at clearances away from a mount (210). First and second presser support bases (311, 312) are disposed on the mount (210), and are also opposed to each other. A presser member (313) is disposed on the first and second optical device support bases (301, 302), and is fixed by the first and second presser support bases (311, 312) at clearances away from the first and second optical device support bases (301, 302). The second waveguide type optical device (202) and the first and second optical device support bases (301, 302) are not fixed to the surrounding members thereof, and are slidable in a direction parallel to the surface of the mount (210).

    Abstract translation: 在波导型光学器件的一部分固定在安装件的凸部上的光学部件中，抑制了由热应力和机械外力引起的光学特性的劣化。 彼此相对的第一和第二光学装置支撑基座（301,302）在远离安装座（210）的间隙处固定到第二波导型光学装置（202）。 第一和第二按压支承座（311,312）设置在座架（210）上，并且也彼此相对。 在第一和第二光学装置支撑底座（301,302）上设置有一个按压件（313），并通过第一和第二按压支撑底座（311,312）以远离第一和第二光学设备支撑件 基地（301,302）。 第二波导型光学器件（202）以及第一和第二光学器件支撑基座（301,302）未固定到其周围构件，并且可在与安装件（210）的表面平行的方向上滑动。

    INTEGRATED OPTICAL MODULE
    49.
    发明公开
    INTEGRATED OPTICAL MODULE 有权
    集成的光学模块

    公开(公告)号：EP2878981A4

    公开(公告)日：2016-04-06

    申请号：EP13822675

    申请日：2013-07-26

    Applicant: NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

    Inventor： KASAHARA RYOICHI ,  ARATAKE ATSUSHI ,  OGAWA IKUO ,  NASU YUSUKE ,  SUZUKI YUICHI ,  SOMA SHUNICHI

    IPC: G02B6/42

    CPC classification number: G02B6/12 ,  G02B6/30 ,  G02B6/42 ,  G02B6/4239 ,  G02B6/4266 ,  G02B2006/12083

    Abstract: An objective is to provide an integrated optical module which can avoid positional change and separation of a PLC chip when humidity changes. Provided is an integrated optical module characterized in that the integrated optical module includes: a PLC chip; a seat bonded and fixed to part of a lower surface of the PLC chip with an adhesive which is applied to an adhesion surface of the seat; and a support portion supporting the seat, in which a water-repellent treatment portion is provided by masking an upper portion of the support portion with a water-repellent material. The water-repellent treatment portion is provided only around the seat for a predetermined width. The water-repellent treatment portion is provided around the seat for a width of 100 µm or more.

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