公开(公告)号：US06580862B2

公开(公告)日：2003-06-17

申请号：US10026084

申请日：2001-12-21

申请人： Toshimi Kominato ,  Akio Sugita ,  Mikitaka Itoh ,  Yasuyuki Inoue ,  Yasuhiro Hida

发明人： Toshimi Kominato ,  Akio Sugita ,  Mikitaka Itoh ,  Yasuyuki Inoue ,  Yasuhiro Hida

IPC分类号： G02B610

CPC分类号： G02B6/12011 ,  G02B6/105 ,  G02B6/12023 ,  G02B6/122 ,  G02B6/2813 ,  G02B2006/121

摘要： An optical waveguide circuit is provided that can reduce or eliminate polarization dependence by reducing or eliminating birefringence. A substrate consists of a silicon substrate, and a cladding and a core are composed of silica-based glass. The core has a multilayer structure composed of a few types of layers with different refractive indices such as first core layers and second core layers stacked in the direction parallel to the substrate. As for the birefringence of the waveguide, the geometrical birefringence caused by the multilayer structure is canceled out by the other birefringence, thereby being able to reduce or eliminate the birefringence of the waveguide.

公开(公告)号：US06775454B2

公开(公告)日：2004-08-10

申请号：US10142130

申请日：2002-05-09

申请人： Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida ,  Yasuyuki Inoue

发明人： Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida ,  Yasuyuki Inoue

IPC分类号： G02B626

CPC分类号： G02B6/1228 ,  G02B6/132 ,  G02B2006/121 ,  G02B2006/12195

摘要： A silica-based optical waveguide circuit serves to reduce the time required to production while allowing a spot size converting function to work sufficiently. In a silica-based optical waveguide circuit comprising an input/output waveguide core formed to be thicker than an waveguide core and a tapered portion for connecting the input/output waveguide core and the waveguide core, wherein the waveguide circuit further has a core layer at each side of the input/output waveguide core, a thickness T of the core layer at the side of the input/output waveguide core is smaller than the thickness H of the input/output waveguide core.

摘要翻译： 二氧化硅基光波导电路用于减少制作时间，同时允许光点尺寸转换功能充分发挥作用。 在包括形成为比波导芯厚的输入/输出波导芯和用于连接输入/输出波导芯和波导芯的锥形部分的二氧化硅基光波导电路中，其中波导电路还具有芯层 输入/输出波导芯的每一侧，芯层在输入/输出波导芯一侧的厚度T小于输入/输出波导芯的厚度H.

公开(公告)号：US06937797B2

公开(公告)日：2005-08-30

申请号：US09950635

申请日：2001-09-13

申请人： Takayuki Mizuno ,  Tsutomu Kitoh ,  Yasuyuki Inoue ,  Yoshinori Hibino ,  Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida

发明人： Takayuki Mizuno ,  Tsutomu Kitoh ,  Yasuyuki Inoue ,  Yoshinori Hibino ,  Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida

IPC分类号： G02B6/12 ,  G02B6/122 ,  G02B6/132 ,  G02B6/136 ,  G02B6/34 ,  G02B6/26

CPC分类号： G02B6/12011 ,  G02B6/12016 ,  G02B6/12023 ,  G02B6/1228 ,  G02B6/132 ,  G02B6/136 ,  G02B2006/121 ,  G02B2006/12176

摘要： A planar lightwave circuit is provided. The planar lightwave circuit includes a waveguide and a spotsize converter which is a part of the waveguide, wherein a core is embedded in a cladding in the waveguide, and the spotsize converter is located near an end face of a substrate on which the planar lightwave circuit is formed, the spotsize converter including: a core width fine-tuning part in an end face side of the substrate; and a core width converting part which follows the core width fine-tuning part; wherein core width of the spotsize converter is minimum at an end face of the substrate, a mean taper angle θ1 of the core width fine-tuning part is larger than 0° and smaller than a mean taper angle θ2 of the core width converting part.

摘要翻译： 提供平面光波电路。 平面光波电路包括作为波导的一部分的波导和斑点转换器，其中芯体嵌入在波导中的包层中，并且斑点转换器位于基板的端面附近，在该基板上的平面光波电路 所述斑点转换器包括：在所述基板的端面侧的芯宽度微调部; 以及沿着芯宽微调部分的芯宽转换部分; 其中斑点转换器的芯宽度在基板的端面处最小，芯宽度微调部分的平均锥角θ1大于0°并且小于平均锥角 核心宽度转换部分的θ2/2。

公开(公告)号：US06625370B2

公开(公告)日：2003-09-23

申请号：US09931684

申请日：2001-08-16

申请人： Mikitaka Itoh ,  Ryoichi Kasahara ,  Takashi Saida ,  Yasuhiro Hida

发明人： Mikitaka Itoh ,  Ryoichi Kasahara ,  Takashi Saida ,  Yasuhiro Hida

IPC分类号： G02B610

CPC分类号： G02B6/136 ,  G02B6/122 ,  G02B6/132 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/121 ,  G02B2006/12176

摘要： An optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without degradation of the optical characteristics and reliability are disclosed, and a fabricating method of an optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without increasing the fabricating burden and the cost are disclosed. The optical waveguide comprises a planar substrate; a lower cladding which is provided on the planar substrate, where the lower cladding has a ridge; a core, provided on the ridge of the lower cladding, for transmitting light; and an upper cladding provided in a manner such that the core is covered with the upper cladding. The ridge has a shape predetermined so as to decrease polarization dependence of the optical waveguide to a required low level.

公开(公告)号：US06304706B1

公开(公告)日：2001-10-16

申请号：US09390490

申请日：1999-09-03

申请人： Akio Sugita ,  Akimasa Kaneko ,  Mikitaka Itoh

发明人： Akio Sugita ,  Akimasa Kaneko ,  Mikitaka Itoh

IPC分类号： G02B610

CPC分类号： G02B6/12011

摘要： This planar lightwave circuit includes a buried layer formed in a region between at least two cores branching from a branching point to decrease in thickness as the spacing between the cores increases with an increase in distance from the branching point. The planar lightwave circuit is designed to suppress scattering of light signals at the branching point.

摘要翻译： 这种平面光波电路包括形成在从分支点分支的至少两个核之间的区域中的掩埋层，随着距分支点的距离的增加，芯之间的间距增加。 平面光波电路被设计成抑制分支点处光信号的散射。

公开(公告)号：US20110110624A1

公开(公告)日：2011-05-12

申请号：US13001347

申请日：2009-06-30

申请人： Shin Kamei ,  Yasuyuki Inoue ,  Mikitaka Itoh

发明人： Shin Kamei ,  Yasuyuki Inoue ,  Mikitaka Itoh

IPC分类号： G02B6/28

CPC分类号： G02B6/12026 ,  G02B6/12014 ,  G02B6/12016 ,  G02B6/12019 ,  G02B6/12028 ,  G02B6/1203

摘要： An optical wavelength multi/demultiplexing circuit is provided in which temperature dependence at a transmission center wavelength remained in an athermalized AWG is compensated. An AWG according to an embodiment of the present invention is compensated for the main temperature dependence at the transmission center wavelength. The AWG comprises an optical splitter, a first and second arm waveguides, an optical mode combining coupler and a multimode waveguide between an input/output waveguide and a slab waveguide. The optical mode combining coupler couples fundamental mode light from the first arm waveguide as fundamental mode and the fundamental mode light from the second arm waveguide as first mode. The multimode waveguide is capable of propagating the fundamental and first mode light. This AWG is configured such that the temperature dependence remained in the arrayed waveguide grating is compensated by changing the optical path length difference between the first and second arm waveguides with temperature.

摘要翻译： 提供了一种光波长多路解多路复用电路，其中传输中心波长处的温度依赖性保持在非热化AWG中。 根据本发明的实施例的AWG被补偿在传输中心波长处的主要温度依赖性。 AWG包括光分路器，第一和第二臂波导，光学模式组合耦合器和输入/输出波导和平板波导之间的多模波导。 光学模式组合耦合器将来自第一臂波导的基本模式光耦合作为基本模式，并将来自第二臂波导的基模光耦合为第一模式。 多模波导能够传播基本和第一模式光。 该AWG被配置为使得通过改变第一和第二臂波导之间的光程长度差随温度来补偿保持在阵列波导光栅中的温度依赖性。

公开(公告)号：US08867873B2

公开(公告)日：2014-10-21

申请号：US13001347

申请日：2009-06-30

申请人： Shin Kamei ,  Yasuyuki Inoue ,  Mikitaka Itoh

发明人： Shin Kamei ,  Yasuyuki Inoue ,  Mikitaka Itoh

IPC分类号： G02B6/28 ,  G02B6/12

CPC分类号： G02B6/12026 ,  G02B6/12014 ,  G02B6/12016 ,  G02B6/12019 ,  G02B6/12028 ,  G02B6/1203

摘要： An optical wavelength multi/demultiplexing circuit is provided in which temperature dependence at a transmission center wavelength remained in an athermalized AWG is compensated. An AWG according to an embodiment of the present invention is compensated for the main temperature dependence at the transmission center wavelength. The AWG comprises an optical splitter, a first and second arm waveguides, an optical mode combining coupler and a multimode waveguide between an input/output waveguide and a slab waveguide. The optical mode combining coupler couples fundamental mode light from the first arm waveguide as fundamental mode and the fundamental mode light from the second arm waveguide as first mode. The multimode waveguide is capable of propagating the fundamental and first mode light. This AWG is configured such that the temperature dependence remained in the arrayed waveguide grating is compensated by changing the optical path length difference between the first and second arm waveguides with temperature.

摘要翻译： 提供了一种光波长多路解多路复用电路，其中传输中心波长处的温度依赖性保持在非热化AWG中。 根据本发明的实施例的AWG被补偿在传输中心波长处的主要温度依赖性。 AWG包括光分路器，第一和第二臂波导，光学模式组合耦合器和输入/输出波导和平板波导之间的多模波导。 光学模式组合耦合器将来自第一臂波导的基本模式光耦合作为基本模式，并将来自第二臂波导的基模光耦合为第一模式。 多模波导能够传播基本和第一模式光。 该AWG被配置为使得通过改变第一和第二臂波导之间的光程长度差随温度来补偿保持在阵列波导光栅中的温度依赖性。

公开(公告)号：US08369666B2

公开(公告)日：2013-02-05

申请号：US13054158

申请日：2009-06-30

申请人： Shin Kamei ,  Tsutomu Kitoh ,  Masaki Kohtoku ,  Tomohiro Shibata ,  Takuya Tanaka ,  Yasuyuki Inoue ,  Mikitaka Itoh

发明人： Shin Kamei ,  Tsutomu Kitoh ,  Masaki Kohtoku ,  Tomohiro Shibata ,  Takuya Tanaka ,  Yasuyuki Inoue ,  Mikitaka Itoh

IPC分类号： G02B6/34 ,  H04J14/02

CPC分类号： G02B6/12028 ,  G02B6/12019 ,  G02B6/29352 ,  G02B6/29398

摘要： An optical wavelength multiplexing/de-multiplexing circuit having a low loss and a flat transmission spectrum is provided. The optical wavelength multiplexing/de-multiplexing circuit compensates a temperature dependence of a center transmission wavelength which remains in an athermal AWG, and has an excellent accuracy of the center transmission wavelength in a whole operating temperature range or has a comparatively wide operable temperature range. The temperature dependence of the transmission wavelength in the athermal MZI is modulated and set so as to cancel the temperature dependence of the center wavelength which remains in the athermal AWG. The present invention focuses particularly on an optical coupler in the MZI and modulates the temperature dependence of the transmission wavelength in the MZI by providing the optical coupler itself with a mechanism which changes a phase difference between two outputs by temperature.

摘要翻译： 提供具有低损耗和平坦透射光谱的光波长多路复用/解复用电路。 光波长复用/解复用电路补偿保持在无热AWG中的中心透射波长的温度依赖性，并且在整个工作温度范围内具有优异的中心透射波长精度或具有相对较宽的可操作温度范围。 在无热MZI中的透射波长的温度依赖性被调制和设定，以抵消保持在无热AWG中的中心波长的温度依赖性。 本发明特别着重于MZI中的光耦合器，并且通过为光耦合器本身提供一种通过温度改变两个输出之间的相位差的机构来调制MZI中的透射波长的温度依赖性。

公开(公告)号：US20110116802A1

公开(公告)日：2011-05-19

申请号：US13054158

申请日：2009-06-30

申请人： Shin Kamei ,  Tsutomu Kitoh ,  Masaki Kohtoku ,  Tomohiro Shibata ,  Takuya Tanaka ,  Yasuyuki Inoue ,  Mikitaka Itoh

发明人： Shin Kamei ,  Tsutomu Kitoh ,  Masaki Kohtoku ,  Tomohiro Shibata ,  Takuya Tanaka ,  Yasuyuki Inoue ,  Mikitaka Itoh

IPC分类号： H04J14/02

CPC分类号： G02B6/12028 ,  G02B6/12019 ,  G02B6/29352 ,  G02B6/29398

摘要： An optical wavelength multiplexing/de-multiplexing circuit having a low loss and a flat transmission spectrum is provided. The optical wavelength multiplexing/de-multiplexing circuit compensates a temperature dependence of a center transmission wavelength which remains in an athermal AWG, and has an excellent accuracy of the center transmission wavelength in a whole operating temperature range or has a comparatively wide operable temperature range. The temperature dependence of the transmission wavelength in the athermal MZI is modulated and set so as to cancel the temperature dependence of the center wavelength which remains in the athermal AWG. The present invention focuses particularly on an optical coupler in the MZI and modulates the temperature dependence of the transmission wavelength in the MZI by providing the optical coupler itself with a mechanism which changes a phase difference between two outputs by temperature.

摘要翻译： 提供具有低损耗和平坦透射光谱的光波长多路复用/解复用电路。 光波长复用/解复用电路补偿保持在无热AWG中的中心透射波长的温度依赖性，并且在整个工作温度范围内具有优异的中心透射波长的精度或具有相当宽的可操作温度范围。 在无热MZI中的透射波长的温度依赖性被调制和设定，以抵消保持在无热AWG中的中心波长的温度依赖性。 本发明特别着重于MZI中的光耦合器，并且通过为光耦合器本身提供一种通过温度改变两个输出之间的相位差的机构来调制MZI中的透射波长的温度依赖性。

公开(公告)号：US20080226290A1

公开(公告)日：2008-09-18

申请号：US12042767

申请日：2008-03-05

申请人： Takaharu Ohyama ,  Takashi Goh ,  Shin Kamei ,  Shunichi Sohma ,  Mikitaka Itoh ,  Ikuo Ogawa ,  Akimasa Kaneko ,  Tomoyuki Yamada ,  Mitsuru Nagano ,  Yoshiyuki Doi ,  Takashi Saida

发明人： Takaharu Ohyama ,  Takashi Goh ,  Shin Kamei ,  Shunichi Sohma ,  Mikitaka Itoh ,  Ikuo Ogawa ,  Akimasa Kaneko ,  Tomoyuki Yamada ,  Mitsuru Nagano ,  Yoshiyuki Doi ,  Takashi Saida

IPC分类号： H04B10/08

CPC分类号： H04B10/07955

摘要： By reducing the number of PD arrays, and by simplifying the configuration of an optical power monitor in a WDM system, a miniaturized, cost reduced optical signal monitoring apparatus, optical system or optical signal monitoring method is provided. An optical power monitor 1 has an optical switch 30 having four input ports 31, a DMUX 2 having 48 output ports, and six CSP type PD array modules 50 each including an 8-channel PD array. The output port 32 of the optical switch 30 having four switchable input ports 31 is optically connected to the input port 21 of the AWG 20. The 48 output ports 22 of the AWG 20 are each optically connected to photosensitive surfaces 53 of the individual PDs included in the CSP type PD array modules 50. The CSP type PD array modules 50 are mounted on the end face of the AWG 20.

摘要翻译： 通过减少PD阵列的数量，并且通过简化WDM系统中的光功率监视器的配置，提供了一种小型化，成本降低的光信号监视装置，光学系统或光信号监视方法。 光功率监视器1具有具有四个输入端口31的光开关30，具有48个输出端口的DMUX 2和每个包括8通道PD阵列的六个CSP型PD阵列模块50。 具有四个可切换输入端口31的光开关30的输出端口32光学连接到AWG 20的输入端口21。 AWG 20的48个输出端口22每个光学连接到包括在CSP型PD阵列模块50中的各个PD的感光表面53。 CSP型PD阵列模块50安装在AWG 20的端面上。