公开(公告)号：US08401351B2

公开(公告)日：2013-03-19

申请号：US13409556

申请日：2012-03-01

申请人： Takashi Inoue ,  Kazutaka Nara

发明人： Takashi Inoue ,  Kazutaka Nara

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02B6/126 ,  G02B6/125 ,  H04B10/612 ,  H04B10/614 ,  H04L27/2096

摘要： The present invention provides a 90-degree hybrid capable of miniaturization and also capable of a stable operation in a wide band. According to an embodiment of the present invention, a PLC-type 90-degree hybrid comprises: a PLC chip having a planar lightwave circuit formed therein; and a 90-degree hybrid circuit formed in the planar lightwave circuit, mixing a modulated signal light and an LO light to separate the signal light into quadrature components I and Q, and outputting the same. The 90-degree hybrid circuit includes: two Y-branch couplers each branching the signal light and the LO light; and two wavelength-independent directional couplers which cause LO lights passing through two paths and signal lights passing through two paths to interfere with each other, respectively. The above-described paths include waveguides having mutually inverted shapes and waveguides having an identical shape, and have a shape substantially symmetrical with respect to the signal light.

摘要翻译： 本发明提供能够小型化并且能够在宽带中稳定操作的90度混合。 根据本发明的实施例，PLC型90度混合动力包括：在其中形成有平面光波回路的PLC芯片; 和形成在平面光波电路中的90度混合电路，混合调制信号光和LO光，以将信号光分离成正交分量I和Q，并输出。 90度混合电路包括：两个Y分支耦合器，每个分支信号光和LO光; 以及两个波长无关的定向耦合器，其分别导致LO光穿过两条路径并且信号光通过两条路径以相互干扰。 上述路径包括具有相互倒置形状的波导和具有相同形状的波导，并且具有相对于信号光基本对称的形状。

公开(公告)号：US08526102B2

公开(公告)日：2013-09-03

申请号：US13409343

申请日：2012-03-01

申请人： Takashi Inoue ,  Kazutaka Nara

发明人： Takashi Inoue ,  Kazutaka Nara

IPC分类号： G02B6/26 ,  G02B6/42 ,  H04J14/06

CPC分类号： H04B10/60 ,  H04B10/613 ,  H04B10/614

摘要： The invention provides a PLC-type DP-QPSK demodulator that reduces connection loss between a polarization beam splitter and a 90-degree hybrid circuit and aims at reducing the manufacturing cost and an optical transmission system using the same. In an embodiment of the invention, a PLC-type DP-QPSK demodulator that receives a DP-QPSK signal includes one PLC chip having a planar lightwave circuit. Input ports and output ports of signal light are provided at an input end and at an output end of the PLC chip, respectively. Within the planar lightwave circuit, there are integrated a polarization beam splitter that splits the DP-QPSK signal into an X-polarization QPSK signal and a Y-polarization QPSK signal, and two 90-degree hybrid circuits that mix the X-polarization QPSK signal and local oscillation light and the Y-polarization QPSK signal and local oscillation light, respectively, split each QPSK signal into orthogonal components I, Q and output them.

摘要翻译： 本发明提供一种PLC型DP-QPSK解调器，其减少偏振分束器和90度混合电路之间的连接损耗，并旨在降低制造成本，并且使用该DP-QPSK解调器的光传输系统。 在本发明的实施例中，接收DP-QPSK信号的PLC型DP-QPSK解调器包括具有平面光波回路的一个PLC芯片。 信号灯的输入端口和输出端口分别设置在PLC芯片的输入端和输出端。 在平面光波电路内，集成有偏振分束器，其将DP-QPSK信号分解成X偏振QPSK信号和Y偏振QPSK信号，以及混合X偏振QPSK信号的两个90度混合电路 并且本地振荡光和Y偏振QPSK信号和本地振荡光分别将每个QPSK信号分成正交分量I，Q并输出。

公开(公告)号：US20120224812A1

公开(公告)日：2012-09-06

申请号：US13409556

申请日：2012-03-01

申请人： Takashi INOUE ,  Kazutaka Nara

发明人： Takashi INOUE ,  Kazutaka Nara

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02B6/126 ,  G02B6/125 ,  H04B10/612 ,  H04B10/614 ,  H04L27/2096

摘要： The present invention provides a 90-degree hybrid capable of miniaturization and also capable of a stable operation in a wide band. According to an embodiment of the present invention, a PLC-type 90-degree hybrid comprises: a PLC chip having a planar lightwave circuit formed therein; and a 90-degree hybrid circuit formed in the planar lightwave circuit, mixing a modulated signal light and an LO light to separate the signal light into quadrature components I and Q, and outputting the same. The 90-degree hybrid circuit includes: two Y-branch couplers each branching the signal light and the LO light; and two wavelength-independent directional couplers which cause LO lights passing through two paths and signal lights passing through two paths to interfere with each other, respectively. The above-described paths include waveguides having mutually inverted shapes and waveguides having an identical shape, and have a shape substantially symmetrical with respect to the signal light.

摘要翻译： 本发明提供能够小型化并且能够在宽带中稳定操作的90度混合。 根据本发明的实施例，PLC型90度混合动力包括：在其中形成有平面光波回路的PLC芯片; 和形成在平面光波电路中的90度混合电路，混合调制信号光和LO光，以将信号光分离成正交分量I和Q，并输出。 90度混合电路包括：两个Y分支耦合器，每个分支信号光和LO光; 以及两个波长无关的定向耦合器，其分别导致LO光穿过两条路径并且信号光通过两条路径以相互干扰。 上述路径包括具有相互倒置形状的波导和具有相同形状的波导，并且具有相对于信号光基本对称的形状。

公开(公告)号：US20120207474A1

公开(公告)日：2012-08-16

申请号：US13409343

申请日：2012-03-01

申请人： Takashi INOUE ,  Kazutaka Nara

发明人： Takashi INOUE ,  Kazutaka Nara

IPC分类号： H04J14/06 ,  G02F2/00

CPC分类号： H04B10/60 ,  H04B10/613 ,  H04B10/614

摘要： The invention provides a PLC-type DP-QPSK demodulator that reduces connection loss between a polarization beam splitter and a 90-degree hybrid circuit and aims at reducing the manufacturing cost and an optical transmission system using the same. In an embodiment of the invention, a PLC-type DP-QPSK demodulator that receives a DP-QPSK signal includes one PLC chip having a planar lightwave circuit. Input ports and output ports of signal light are provided at an input end and at an output end of the PLC chip, respectively. Within the planar lightwave circuit, there are integrated a polarization beam splitter that splits the DP-QPSK signal into an X-polarization QPSK signal and a Y-polarization QPSK signal, and two 90-degree hybrid circuits that mix the X-polarization QPSK signal and local oscillation light and the Y-polarization QPSK signal and local oscillation light, respectively, split each QPSK signal into orthogonal components I, Q and output them.

摘要翻译： 本发明提供一种PLC型DP-QPSK解调器，其减少偏振分束器和90度混合电路之间的连接损耗，并旨在降低制造成本，并且使用该DP-QPSK解调器的光传输系统。 在本发明的实施例中，接收DP-QPSK信号的PLC型DP-QPSK解调器包括具有平面光波回路的一个PLC芯片。 信号灯的输入端口和输出端口分别设置在PLC芯片的输入端和输出端。 在平面光波电路内，集成有偏振分束器，其将DP-QPSK信号分解成X偏振QPSK信号和Y偏振QPSK信号，以及混合X偏振QPSK信号的两个90度混合电路 并且本地振荡光和Y偏振QPSK信号和本地振荡光分别将每个QPSK信号分成正交分量I，Q并输出。

公开(公告)号：US07884996B2

公开(公告)日：2011-02-08

申请号：US12629846

申请日：2009-12-02

申请人： Junichi Hasegawa ,  Kazutaka Nara

发明人： Junichi Hasegawa ,  Kazutaka Nara

IPC分类号： G02F2/00 ,  G02B6/12

CPC分类号： G02F2/00 ,  H04B10/505 ,  H04B10/677

摘要： A delay-line demodulator for demodulating a differential quadrature phase shift keying (DQPSK) signal is provided. The demodulator includes two Mach-Zehnder interferometers individually comprising two waveguides having different lengths therebetween and through which a light signal branched from the DQPSK signal propagates, respectively. A phase of the light signal propagating at one of the waveguides is delayed as compared to a phase of the light signal propagating at another one of the waveguides, wherein a divergence amount of polarization is adjusted by driving sets of heaters that are facing each other and sandwiching a half wavelength plate therebetween.

摘要翻译： 提供了用于解调差分正交相移键控（DQPSK）信号的延迟线解调器。 解调器包括两个马赫 - 曾德干涉仪，它们分别包括两个不同长度的波导，分别从DQPSK信号分支的光信号通过该波导传播。 与在另一个波导上传播的光信号的相位相比，在波导中的一个传播的光信号的相位被延迟，其中通过驱动彼此面对的加热器组来调节偏振的发散量， 在其间夹着半波片。

公开(公告)号：US20110008002A1

公开(公告)日：2011-01-13

申请号：US12831662

申请日：2010-07-07

申请人： Junichi HASEGAWA ,  Kazutaka Nara

发明人： Junichi HASEGAWA ,  Kazutaka Nara

IPC分类号： G02B6/34 ,  G02B6/10

CPC分类号： G02B6/1203 ,  G02B6/12033

摘要： A multiplexer/demultiplexer includes: a waveguide chip including a first chip and a second chip that are divided by a plane and obtained by cutting, together with a substrate, in a direction crossing an optical axis, a first slab waveguide of an AWG including the first slab waveguide and a second slab waveguide that are formed on the substrate; a first base to which the first chip is fixed; a second base separated from the first base and to which the second chip is fixed; and a member that has one end fixed to the first base or chip and another end fixed to the second base or chip, in a state in which cut surfaces of the first and second chips face each other, and that is configured to move the first base and the second base relatively to each other along the plane by expanding/contracting when temperature changes.

摘要翻译： 多路复用器/解复用器包括：波导芯片，包括由平面划分得到的第一芯片和第二芯片，所述第一芯片和第二芯片与基板一起沿与光轴交叉的方向切割，所述第一芯片和第二芯片包括AWG的第一平板波导 第一平板波导和形成在基板上的第二平板波导; 固定第一芯片的第一基座; 与所述第一基座分离并且所述第二芯片固定到所述第二基座的第二基座; 以及在第一和第二芯片的切割面彼此面对的状态下固定到第一基座或芯片的一端固定到第二基座或芯片的另一端部，并且构造成将第一 基部和第二基座在温度变化时通过膨胀/收缩沿着平面彼此相对。

公开(公告)号：US20100142900A1

公开(公告)日：2010-06-10

申请号：US12625581

申请日：2009-11-25

申请人： Yasuyoshi Uchida ,  Kazutaka Nara

发明人： Yasuyoshi Uchida ,  Kazutaka Nara

IPC分类号： G02B6/36 ,  G02B6/10 ,  G03F7/20

CPC分类号： G02B6/305 ,  G02B6/4249

摘要： There is provided a SSC chip whose yield may be improved and whose processing steps may be simplified as compare to those of a prior art PLC chip having a light waveguide circuit to which a spot-size converter (SSC) is added, a fiber array attached with the SSC chip, a PLC module attached with the SSC chip and a method for manufacturing the SSC chip. The SSC chip has four spot-size converters and is fabricated separately from a PLC chip. Each SSC has a straight waveguide having the same core width and height with an end of an input/output waveguide of the PLC chip, a horizontally tapered waveguide in which the core width is enlarged in a tapered shape in the horizontal direction from the core width of the straight waveguide, a vertically tapered waveguide in which the core height is enlarged in a tapered shape in the vertical direction from the core height of the horizontally tapered waveguide and a spot-size enlarged portion whose core width and core height are both enlarged. Because it is unnecessary to fabricate the SSC at the end of the input/output waveguide of the PLC chip, a yield of the PLC chip may be improved.

摘要翻译： 提供了一种SSC芯片，其成品率可以被提高，并且与现有技术的具有添加了点尺寸转换器（SSC）的光波导电路的PLC芯片相比，其处理步骤可以被简化，光纤阵列附着 使用SSC芯片，连接有SSC芯片的PLC模块和SSC芯片的制造方法。 SSC芯片有四个点尺寸转换器，与PLC芯片分开制造。 每个SSC具有与PLC芯片的输入/输出波导的端部相同的芯宽度和高度的直波导管，水平锥形波导，其中芯宽度从芯宽度沿水平方向扩大为锥形 的直线波导，其中芯高度从水平锥形波导的芯高度沿垂直方向以锥形形状扩大，并且芯宽和芯高均增大的点尺寸扩大部分的垂直锥形波导。 由于不需要在PLC芯片的输入/输出波导端部制造SSC，所以可以提高PLC芯片的产量。

公开(公告)号：US07542640B2

公开(公告)日：2009-06-02

申请号：US12056892

申请日：2008-03-27

申请人： Kazutaka Nara

发明人： Kazutaka Nara

IPC分类号： G02B6/34 ,  G02B6/28

CPC分类号： G02B6/12009

摘要： An arrayed waveguide grating optical multiplexer/demultiplexer includes an arrayed waveguide grating formed on a substrate. The arrayed waveguide grating includes two slab waveguides, one arrayed waveguide, first input/output waveguides respectively connected to each end facet of slab waveguides, and second input/output waveguide-groups respectively connected to the end facets. The first input/output waveguides are provided for inputting or outputting a plurality of lights (λ1˜λn) each of which has a different wavelength and multiplexed. The second input/output waveguides are provided for individually inputting or outputting a plurality of lights (λ1˜λn). One arrayed waveguide 23 can be used to carry out simultaneously multiplexing and demultiplexing. It is able to carry out simultaneously multiplexing and demultiplexing with one arrayed waveguide grating.

摘要翻译： 阵列波导光栅光复用器/解复用器包括形成在衬底上的阵列波导光栅。 阵列波导光栅包括两个平板波导，一个阵列波导，分别连接到平板波导的每个端面的第一输入/输出波导和分别连接到端面的第二输入/输出波导组。 第一输入/输出波导被提供用于输入或输出每个具有不同波长并多路复用的多个光（λ1〜lambdan）。 第二输入/输出波导被提供用于单独输入或输出多个灯（lambda1〜lambdan）。 一个阵列波导23可以用于同时进行多路复用和解复用。 它能够与一个阵列波导光栅同时进行复用和解复用。

公开(公告)号：US07133587B2

公开(公告)日：2006-11-07

申请号：US11416200

申请日：2006-05-03

申请人： Kazutaka Nara ,  Kazuhisa Kashihara

发明人： Kazutaka Nara ,  Kazuhisa Kashihara

IPC分类号： G02B6/34 ,  H04J14/02 ,  H01L21/00

CPC分类号： G02B6/12011 ,  G02B6/29394 ,  G02F1/0147 ,  G02F2001/0113

摘要： A dispersion compensator includes at least one first optical waveguide, a first slab waveguide, an arrayed waveguide connected to the at least one first optical waveguide via the first slab waveguide, a second slab waveguide, at least one second optical waveguide connected to the arrayed waveguide via the second slab waveguide, and a phase distribution provider configured to provide a phase distribution to the arrayed waveguide.

公开(公告)号：US06567587B2

公开(公告)日：2003-05-20

申请号：US09818592

申请日：2001-03-28

申请人： Kazuhisa Kashihara ,  Kazutaka Nara ,  Kanji Tanaka

发明人： Kazuhisa Kashihara ,  Kazutaka Nara ,  Kanji Tanaka

IPC分类号： G02B600

CPC分类号： G02B6/12019 ,  G02B6/29394

摘要： A dispersion compensator with Bragg gratings which have a dispersion compensating function and are formed on output waveguides of an arrayed waveguide grating, and a dispersion-compensating module employing the dispersion compensator.

摘要翻译： 具有色散补偿功能并形成在阵列波导光栅的输出波导上的布拉格光栅的色散补偿器和采用色散补偿器的色散补偿模块。