公开(公告)号：US06643431B2

公开(公告)日：2003-11-04

申请号：US10096535

申请日：2002-03-13

申请人： Hitoshi Hatayama ,  Chisai Hirose ,  Masayuki Nishimura ,  Makoto Katayama

发明人： Hitoshi Hatayama ,  Chisai Hirose ,  Masayuki Nishimura ,  Makoto Katayama

IPC分类号： G02B626

CPC分类号： G02F1/225 ,  G02B2006/12116 ,  G02B2006/12159 ,  G02F1/0147

摘要： A main optical path and an auxiliary optical path which are formed in a substrate are optically coupled to each other with a plurality of optical couplers, so as to constitute a Mach-Zehnder interferometer. By controlling the temperature regulation of main and auxiliary optical paths effected by heaters, a control unit regulates the transmissivity of light across an optical input end and an optical output end. Respective optical path lengths of the main and auxiliary optical paths are set so as to lower birefringence when optical loss becomes greater.

公开(公告)号：US06690872B2

公开(公告)日：2004-02-10

申请号：US09756869

申请日：2001-01-10

申请人： Takashi Sasaki ,  Shigeru Hirai ,  Nobuhiro Akasaka ,  Shigeru Tanaka ,  Chisai Hirose

发明人： Takashi Sasaki ,  Shigeru Hirai ,  Nobuhiro Akasaka ,  Shigeru Tanaka ,  Chisai Hirose

IPC分类号： G02F11337

CPC分类号： G02B6/12023 ,  G02B6/105 ,  G02B6/122 ,  G02B6/132

摘要： A silica based optical waveguide is described, comprising a substrate, a core waveguide formed thereon, and an over cladding part comprising a silica based glass with a refractive index lowering dopant and a refractive index increasing dopant added, formed on the substrate so as to cover the core waveguide, wherein a segregation layer with a higher concentration of the refractive index increasing dopant is formed in a part of the over cladding part in contact with the substrate and the core waveguide such that at least a part of the refractive index increase in the segregation layer provided by the refractive index increasing dopant with respect to the part of the over cladding part other than the segregation layer is offset by decline of the refractive index by increasing the amount of the refractive index lowering dopant added in the segregation layer and/or adding another refractive index lowering dopant.

摘要翻译： 描述了一种二氧化硅基光波导，其包括基板，形成在其上的芯波导，以及包括部分，其包括具有折射率降低掺杂剂的二氧化硅基玻璃和添加的折射率增加掺杂剂的覆盖部分，以覆盖基板 所述芯波导，其中在与所述基板和所述芯波导接触的所述上包层部分的一部分中形成具有较高浓度的所述折射率增加掺杂剂的偏析层，使得所述折射率的至少一部分在 由折射率增加掺杂剂相对于偏析层以外的上包层部分的部分提供的偏析层由于通过增加偏析层中添加的折射率降低掺杂剂的量而折射率的下降和/或 添加另一种折射率降低掺杂剂。

公开(公告)号：US5551966A

公开(公告)日：1996-09-03

申请号：US181126

申请日：1994-01-13

申请人： Chisai Hirose ,  Hiroo Kanamori ,  Akira Urano ,  Shinji Ishikawa ,  Haruhiko Aikawa ,  Masahide Saito

发明人： Chisai Hirose ,  Hiroo Kanamori ,  Akira Urano ,  Shinji Ishikawa ,  Haruhiko Aikawa ,  Masahide Saito

IPC分类号： C03B8/04 ,  C03C13/04 ,  G02B6/132 ,  G02B6/136

CPC分类号： G02B6/136 ,  C03C13/045 ,  G02B6/132

摘要： In the method for forming an optical waveguide according to this invention, an optical waveguide comprising a core of quartz as a main component, and a cladding layers surrounding the core is formed by deposition of glass fine particles by flame hydrolysis deposition and vitrifying the glass fine particle layers. This method includes a step of transiently increasing a feed amount of phosphorus to a flame burner in forming glass fine particle layers to be the cladding layers. Feeding phosphorus in this step for the first time after a glass fine particle layer is deposited without feeding phosphorus to the flame burner, whereby generation of foreign objects near the core dan be suppressed. The method for fabricating an optical waveguide according to this invention is for fabricating a core 132a or cladding layers 122 142 surrounding the core 132a by flame hydrolysis deposition and is characterized in that the glass fine particle layers are vitrified after the deposition of the phosphorus-content glass fine particle layer, whereby glass films 122a, 122b with a thickness of below 10 .mu.m are formed. This glass film forming step is repeated twice or more times to form the core or the glass layers to be the cladding layers surrounding the core. This invention can suppress inhomogeneous vitrified films and especially can make phosphorus concentrations in the cladding layers uniform. As a result, prapagation losses can be made small.

摘要翻译： 在本发明的光波导形成方法中，以石英为核心的光波导和围绕芯的包层形成，通过火焰水解沉积玻璃微粒并使玻璃微细化 颗粒层。 该方法包括在形成作为包覆层的玻璃微粒子层时，向火焰燃烧器短暂地增加磷的供给量的步骤。 在玻璃微粒层沉积后，在该步骤中首先进料磷，而不向磷火焰炉供给磷，从而抑制在核心附近产生异物。 根据本发明的制造光波导的方法是通过火焰水解沉积来制造围绕芯132a的芯132a或包层122 142，其特征在于在沉积磷含量之后玻璃微粒层被玻璃化 玻璃微粒层，由此形成厚度低于10μm的玻璃膜122a，122b。 将该玻璃成膜工序重复两次以上，形成作为芯周围的包层的芯或玻璃层。 本发明可以抑制不均匀的玻璃化膜，特别是可以使包层中的磷浓度均匀。 因此，可以减少预算损失。

公开(公告)号：US06819859B2

公开(公告)日：2004-11-16

申请号：US10196214

申请日：2002-07-17

申请人： Hitoshi Hatayama ,  Chisai Hirose

发明人： Hitoshi Hatayama ,  Chisai Hirose

IPC分类号： G02B600

CPC分类号： G02F1/225 ,  G02F1/0147 ,  G02F2203/48

摘要： The invention provides a planar lightwave circuit type variable optical attenuator in which a small PDL is maintained even when an attenuation is large. The variable optical attenuator is constituted by a Mach-Zehnder interferometer comprising a substrate, two optical waveguide arms buried in a clad formed on the substrate, and thin-film heaters disposed on the surface of the clad and adjusting optical lengths of the optical waveguide arms. The optical waveguide arms are each made of a silica-based glass material, and a difference &Dgr;L0 between arm lengths is set to be in the range of 0.38 &mgr;m to 0.52 &mgr;m.

摘要翻译： 本发明提供了一种平面光波回路型可变光衰减器，即使在衰减较大时也保持小的PDL。 可变光衰减器由包括衬底的Mach-Zehnder干涉仪构成，掩埋在形成于衬底上的包层中的两个光波导臂和设置在包层表面上的调节光波长臂的光学长度的薄膜加热器 。 光波导臂各自由二氧化硅类玻璃材料制成，臂长之间的差值ΔL0设定在0.38μm〜0.52μm的范围内。

公开(公告)号：US06560381B2

公开(公告)日：2003-05-06

申请号：US09921140

申请日：2001-08-03

申请人： Hitoshi Hatayama ,  Masayuki Nishimura ,  Chisai Hirose

发明人： Hitoshi Hatayama ,  Masayuki Nishimura ,  Chisai Hirose

IPC分类号： G02B626

CPC分类号： G02B6/12007 ,  G02B6/29355 ,  G02F1/0147 ,  G02F1/225 ,  G02F2201/16 ,  G02F2203/48

摘要： Three Mach-Zehnder interferometers 141 to 143 are connected in a series between an optical input terminal and an optical output terminal in an optical filter. Each interferometer is composed of two optical paths optical coupled at both ends by optical couplers. Only one interferometer has same optical path lengths between optical couplers. Heaters are disposed on each optical paths to allow the slope of transmission loss to change through the adjustment of the phase shift between those respective optical paths.

公开(公告)号：US5693116A

公开(公告)日：1997-12-02

申请号：US426139

申请日：1995-04-21

申请人： Hiroo Kanamori ,  Chisai Hirose ,  Yuji Matsuura

发明人： Hiroo Kanamori ,  Chisai Hirose ,  Yuji Matsuura

IPC分类号： C03B8/04 ,  C03B19/14 ,  C03C17/02 ,  G02B6/12 ,  G02B6/13 ,  G02B6/10

CPC分类号： C03B19/14 ,  C03B19/1453 ,  C03C17/02 ,  G02B6/13 ,  G02B2006/12038

摘要： This process for producing an optical waveguide comprises a step of sintering a glass fine-particle layer to form a upper cladding layer, and a step of controlling a refractive index of the upper cladding layer by changing a temperature decreasing rate when the glass layer is cooled down to the room temperature.

摘要翻译： 该光波导的制造方法包括烧结玻璃微粒层以形成上包层的步骤，以及当玻璃层冷却时通过改变温度降低速率来控制上包层的折射率的步骤 降到室温。

公开(公告)号：US06782168B2

公开(公告)日：2004-08-24

申请号：US10175381

申请日：2002-06-20

申请人： Hitoshi Hatayama ,  Chisai Hirose ,  Masayuki Nishimura

发明人： Hitoshi Hatayama ,  Chisai Hirose ,  Masayuki Nishimura

IPC分类号： G02B626

CPC分类号： H04J14/02 ,  G02B6/12004 ,  G02B6/29352 ,  G02B6/29385 ,  G02B6/29395 ,  G02B6/29398 ,  G02B6/4215 ,  H04B10/077 ,  H04B10/07955

摘要： The invention provides an apparatus for and method of monitoring wavelength multiplexed signal light, which can obtain monitored data for multi-channel optical signals contained in the wavelength multiplexed signal light, which can avoid a large size and complicated structure and high cost of monitoring apparatus, and which can easily monitor the wavelength multiplexed signal light. The invention also provides an optical transmission system employing the monitoring apparatus and method. An optical filter being able to control a loss pattern is disposed on a monitoring waveguide for the wavelength multiplexed signal light, which is branched for monitoring from an input waveguide and an output waveguide constituting a main optical transmission path in a wavelength multiplexed signal light monitoring apparatus. While the optical filter sets a plurality of loss patterns in sequence, the wavelength multiplexed signal light having passed through the optical filter is detected by a photodiode for each of the loss patterns, and monitored data of the wavelength multiplexed signal light can be obtained from detected data.

摘要翻译： 本发明提供了一种监测波长多路复用信号光的装置和方法，可以获得波长复用信号光中包含的多通道光信号的监测数据，避免了尺寸大，结构复杂，成本高的监控装置， 并且可以容易地监视波长复用信号光。 本发明还提供一种采用监测装置和方法的光传输系统。 能够控制损耗图案的滤光器设置在用于波长多路复用信号光的监视波导上，该波长复用信号光在波长多路复用信号光监视装置中从构成主光传输路径的输入波导和输出波导进行监视分支 。 虽然光学滤波器依次设置多个损耗模式，但是通过光电二极管检测通过滤光器的波长多路复用信号光，并且可以通过检测到的波长复用信号光的监视数据 数据。

公开(公告)号：US5556442A

公开(公告)日：1996-09-17

申请号：US264301

申请日：1994-06-23

申请人： Hiroo Kanamori ,  Akira Urano ,  Haruhiko Aikawa ,  Shinji Ishikawa ,  Chisai Hirose ,  Masahide Saito

发明人： Hiroo Kanamori ,  Akira Urano ,  Haruhiko Aikawa ,  Shinji Ishikawa ,  Chisai Hirose ,  Masahide Saito

IPC分类号： C03B19/14 ,  C03C17/02 ,  G02B6/12 ,  G02B6/13 ,  C03C17/00 ,  G02B6/10

CPC分类号： C03B19/1453 ,  C03B19/14 ,  C03C17/02 ,  G02B6/13 ,  G02B2006/12038

摘要： A process for forming film structure using Flame Hydrolysis Deposition (FHD) in which (1) glass soot is deposited on a substrate via FHD to form a first porous vitreous layer having a first bulk density, (2) a second porous vitreous layer having a second bulk density that is larger than the first bulk density is formed from a portion of the first porous vitreous layer, and (3) a third porous vitreous layer having a third bulk density is formed by depositing glass soot containing a refractive index increasing dopant on the second porous vitreous layer by FHD. The first, second and third porous vitreous layers are then heated to form an undercladding layer and a core layer, the undercladding layer being formed from the first and second porous vitreous layers and the core layer being formed from the third porous vitreous layer.

摘要翻译： 使用火焰水解沉积（FHD）形成膜结构的方法，其中（1）玻璃烟炱通过FHD沉积在基底上，以形成具有第一堆积密度的第一多孔玻璃质层，（2）第二多孔玻璃质层，其具有 大于第一堆积密度的第二堆积密度由第一多孔玻璃质层的一部分形成，并且（3）通过将含有折射率增加掺杂剂的玻璃烟灰沉积在第三堆积密度上而形成第三多孔玻璃质层 FHD第二个多孔玻璃质层。 然后将第一，第二和第三多孔玻璃质层加热以形成下包层和芯层，底层由第一和第二多孔玻璃质层形成，芯层由第三多孔玻璃质层形成。

公开(公告)号：US5385594A

公开(公告)日：1995-01-31

申请号：US986001

申请日：1992-12-04

申请人： Hiroo Kanamori ,  Akira Urano ,  Haruhiko Aikawa ,  Shinji Ishikawa ,  Chisai Hirose ,  Masahide Saito

发明人： Hiroo Kanamori ,  Akira Urano ,  Haruhiko Aikawa ,  Shinji Ishikawa ,  Chisai Hirose ,  Masahide Saito

IPC分类号： C03B19/14 ,  C03C17/02 ,  G02B6/12 ,  G02B6/13 ,  C03C17/00

CPC分类号： C03B19/1453 ,  C03B19/14 ,  C03C17/02 ,  G02B6/13 ,  G02B2006/12038

摘要： In the first step, a fuel and raw material gases are fed to burner while flames from the burner scan a Si substrate. Synthesized fine glass particles are deposited on the substrate to form a first porous vitreous layer to be an under cladding layer. In the second step, the first porous vitreous layer is heated by the flames. A bulk density of an upper part of the first porous vitreous layer is raised to 0.3 g/cm.sup.3. Having a raised bulk density, this upper part functions as a shield layer against GeO.sub.2. In the third step, a second porous vitreous layer, to be a core layer, is deposited uniformly on the first porous vitreous layer. In the fourth step, the first and the second porous vitreous layers are sintered. In this case, the shield layer with a higher bulk density hinders the GeO.sub.2 component which has evaporated from the second porous vitreous layer from diffusing into the first porous vitreous layer.

摘要翻译： 在第一步中，燃料和原料气体被送入燃烧器，而来自燃烧器的火焰扫描Si衬底。 合成的细微玻璃颗粒沉积在基底上以形成第一多孔玻璃质层作为下敷层。 在第二步骤中，第一多孔玻璃质层被火焰加热。 将第一多孔玻璃质层的上部的体积密度提高到0.3g / cm 3。 具有凸起的堆积密度，该上部用作抵抗GeO 2的屏蔽层。 在第三步骤中，将作为芯层的第二多孔玻璃质层均匀地沉积在第一多孔玻璃质层上。 在第四步骤中，第一和第二多孔玻璃质层被烧结。 在这种情况下，具有较高堆积密度的屏蔽层阻碍从第二多孔玻璃质层蒸发的GeO 2组分扩散到第一多孔玻璃质层中。