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11 条记录 (耗时 0.035 秒)

    Optical fiber diffraction grating, a method of fabricating thereof and a laser light source
    3.
    发明授权
    Optical fiber diffraction grating, a method of fabricating thereof and a laser light source 失效
    光纤衍射光栅，其制造方法和激光光源

    公开(公告)号：US6067392A

    公开(公告)日：2000-05-23

    申请号：US860697

    申请日：1997-06-16

    申请人： Toshinori Wakami ,  Masayuki Shigematsu ,  Yoshiaki Terasawa ,  Akira Inoue ,  Masakazu Shigehara ,  Toru Iwashima

    发明人： Toshinori Wakami ,  Masayuki Shigematsu ,  Yoshiaki Terasawa ,  Akira Inoue ,  Masakazu Shigehara ,  Toru Iwashima

    IPC分类号： G02B6/38 ,  H01S3/067 ,  G02B6/22

    CPC分类号： H01S3/0675 ,  G02B6/0218 ,  G02B6/0219 ,  G02B6/3845

    摘要： A diffraction grating portion (12) is formed in an optical fiber (10), having a diameter of 125 .mu.m and serving to transmit light, along its optical axis. The optical fiber is concentrically surrounded by a lower coating portion (14) having an outer diameter of 300 .mu.m and consisting of a silicone resin. The lower coating portion is concentrically surrounded by a coating portion (16) having an outer diameter of 900 .mu.m and consisting of a liquid crystal polymer, e.g., polyester amide. The coating portion is further surrounded by an outermost coating portion (18) having an outer diameter of 1 mm and consisting of a UV curing resin colored for identification. Both the optical fiber (10) and the lower coating portion (14) have positive thermal expansion coefficients. In contrast to this, the coating portion (16) consisting of the liquid crystal polymer has a negative thermal expansion coefficient.

    摘要翻译： PCT No.PCT / JP96 / 03000 Sec。 371日期：1997年6月16日 102（e）日期1996年6月16日PCT提交1996年10月16日PCT公布。 公开号WO97 / 14983 日期1997年04月24日衍射光栅部分（12）形成在光纤（10）中，其直径为125μm，用于沿其光轴透射光。 光纤由外部为300μm的下部涂层部分（14）同心围绕，由硅树脂构成。 下涂层部分由外径为900μm的涂层部分（16）同心地围绕，并由液晶聚合物例如聚酯酰胺组成。 涂层部分进一步被外径为1mm的最外涂层部分（18）包围，并由用于识别的紫外线固化树脂组成。 光纤（10）和下涂层部分（14）均具有正的热膨胀系数。 与此相反，由液晶聚合物构成的涂布部分（16）具有负的热膨胀系数。

    Method for determining a condition of aging for optical fiber grating
    4.
    发明授权
    Method for determining a condition of aging for optical fiber grating 失效
    确定光纤光栅老化状态的方法

    公开(公告)号：US06137931A

    公开(公告)日：2000-10-24

    申请号：US70799

    申请日：1998-05-01

    申请人： Shinji Ishikawa ,  Toru Iwashima ,  Michiko Harumoto ,  Akira Inoue

    发明人： Shinji Ishikawa ,  Toru Iwashima ,  Michiko Harumoto ,  Akira Inoue

    IPC分类号： G02B6/34

    CPC分类号： G02B6/02185

    摘要： The present invention provides a method for determining a condition of aging for an optical fiber grating. This method comprises a step of setting the aged deterioration curve of the optical fiber grating as a form proportional to t.sup.-n, where t represents time, and n represents a parameter dependent on temperature; and a step of determining the condition of the aging according to the aged deterioration curve.

    摘要翻译： 本发明提供一种用于确定光纤光栅老化状况的方法。 该方法包括将光纤光栅的老化劣化曲线设置为与t-n成比例的形式，其中t表示时间，n表示取决于温度的参数的步骤; 以及根据老化劣化曲线确定老化条件的步骤。

    Variable dispersion compensator and optical transmission system
    5.
    发明授权
    Variable dispersion compensator and optical transmission system 有权
    可变色散补偿器和光传输系统

    公开(公告)号：US06892003B2

    公开(公告)日：2005-05-10

    申请号：US10114321

    申请日：2002-04-03

    申请人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

    发明人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

    IPC分类号： H04B10/18 ,  G02B6/26 ,  G02B6/35 ,  H04J14/02

    CPC分类号： H04B10/25133

    摘要： An optical signal, which is to become the subject of dispersion compensation, is split by optical combining/splitting unit 2, and each frequency component of the optical signal that is split is reflected by the corresponding reflective mirror 30 included in reflective mirror group 3 to apply a predetermined phase shift to the respective frequency components Each reflected frequency component is then combined using optical combining/splitting unit 2, to give dispersion compensated optical signal Furthermore, in regards to reflective mirror group 3, which is used to apply phase shift to each frequency component of an optical signal, each of the respective plurality of reflective mirrors 30 is made a movable mirror having a movable reflection position that reflects the frequency components. Through this, dispersion that develops in an optical signal may be compensated with favorable controllability and high accuracy. Therefore, the precision and controllability of dispersion compensation will become superior, and realized is a variable dispersion compensator having a miniaturized optical circuit, and an optical transmission system comprising such variable dispersion compensator,

    摘要翻译： 要成为色散补偿的对象的光信号被光学合成/分离单元2分离，并且被分离的光信号的每个频率分量被包括在反射镜组3中的相应的反射镜30反射到 对相应的频率分量施加预定的相移。然后使用光学合成/分离单元2组合每个反射频率分量，以产生色散补偿的光信号。此外，关于反射镜组3，其用于将相移施加到每个 光信号的频率分量，各个反射镜30中的每一个被制成具有反映频率分量的可移动反射位置的可移动反射镜。 由此，可以以良好的可控性和高精度补偿在光信号中产生的色散。 因此，色散补偿的精度和可控性将变得更好，并且实现了具有小型化光电路的可变色散补偿器和包括这种可变色散补偿器的光传输系统，

    Diffraction grating device
    6.
    发明授权
    Diffraction grating device 失效
    衍射光栅装置

    公开(公告)号：US06483955B2

    公开(公告)日：2002-11-19

    申请号：US09799354

    申请日：2001-03-06

    申请人： Manabu Shiozaki ,  Toru Iwashima ,  Masakazu Shigehara ,  Kiyotaka Murashima

    发明人： Manabu Shiozaki ,  Toru Iwashima ,  Masakazu Shigehara ,  Kiyotaka Murashima

    IPC分类号： G02F1295

    CPC分类号： G02B6/0208

    摘要： This invention relates to a diffraction grating device having a refractive index modulation formed in an optical waveguide region in a predetermined region in the longitudinal direction of the optical waveguide. In the diffraction grating device, a refractive index modulation is formed in the core region in a predetermined region in the longitudinal direction of the optical waveguide. In this diffraction grating device, the optical period of the refractive index modulation is substantially constant, the phase of the refractive index modulation is inverted at a phase inversion portion, and the number of phase inversion portions is one or two. In this diffraction grating device, the absolute value of a parameter R (equation (22a)) is smaller than 0.25. According to this invention, a diffraction grating device capable of shortening the region where the refractive index modulation is formed and flattening the reflectance characteristic in the reflection wavelength band is provided.

    摘要翻译： 本发明涉及一种衍射光栅装置，其具有在光波导的纵向方向上的预定区域中的光波导区域中形成的折射率调制。 在衍射光栅装置中，在光波导的长度方向的规定区域的芯部区域形成折射率调制。 在该衍射光栅装置中，折射率调制的光学周期基本上是恒定的，折射率调制的相位在相位反转部分反转，相位反转部分的数量是一个或两个。 在该衍射光栅装置中，参数R（式（22a））的绝对值小于0.25。 根据本发明，提供了能够缩短形成折射率调制区域并使反射波长带的反射特性变平的衍射光栅装置。

    Optical waveguide devices and methods of fabricating the same
    8.
    发明授权
    Optical waveguide devices and methods of fabricating the same 有权
    光波导器件及其制造方法

    公开(公告)号：US06477308B2

    公开(公告)日：2002-11-05

    申请号：US09847374

    申请日：2001-05-03

    申请人： Tetsuya Hattori ,  Shigeru Semura ,  Toru Iwashima

    发明人： Tetsuya Hattori ,  Shigeru Semura ,  Toru Iwashima

    IPC分类号： G02B610

    CPC分类号： G02B6/132 ,  G02B6/105 ,  G02B6/122 ,  G02B6/30

    摘要： The present invention concerns an optical waveguide device having a structure for effectively suppressing variation in optical characteristics due to temperature change without causing increase in device size, and a fabrication method thereof. The optical waveguide device has a structure in which a first main member having a positive coefficient of linear expansion is fixed to a sub member having a negative coefficient of linear expansion. The first main member is provided with an undercladding, a core functioning as an optical waveguide provided on a plane of the undercladding, and an overcladding provided so as to cover the core between the undercladding and the overcladding. The first main member is made, for example, of a silica glass or silicon based material and the core is doped with a dopant for increasing the refractive index. While covering the whole of at least one major surface of the first main member, the sub member is fixed to the major surface.

    摘要翻译： 本发明涉及一种光波导器件及其制造方法，该光波导器件具有有效地抑制温度变化引起的光学特性变化而不引起器件尺寸增大的结构。 光波导装置具有将具有正的线性膨胀系数的第一主要部件固定到具有负的线性膨胀系数的子部件的结构。 第一主要构件设置有下包层，作为设置在下包层平面上的光波导的芯体，以及提供以覆盖下包层和外包层之间的芯的外包层。 第一主要构件例如由二氧化硅玻璃或硅基材料制成，并且该芯用掺杂剂掺杂以增加折射率。 在覆盖第一主要构件的整个至少一个主表面的同时，副构件固定在主表面上。

    Diffraction grating device
    9.
    发明授权
    Diffraction grating device 有权
    衍射光栅装置

    公开(公告)号：US06876791B2

    公开(公告)日：2005-04-05

    申请号：US10184105

    申请日：2002-06-28

    申请人： Kiyotaka Murashima ,  Ken Hashimoto ,  Toru Iwashima

    发明人： Kiyotaka Murashima ,  Ken Hashimoto ,  Toru Iwashima

    IPC分类号： G02B6/02 ,  G02B6/12 ,  G02B6/124 ,  G02B6/34

    CPC分类号： G02B6/124 ,  G02B6/02085 ,  G02B6/021 ,  G02B6/02138 ,  G02B6/12007 ,  G02B2006/12107

    摘要： In a diffraction grating device (1), index modulations are formed along the longitudinal direction of an optical fiber (10) serving as an optical waveguide. The optical fiber (10) has a core region (11), an inner cladding region (12), and an outer cladding region (13) sequentially from the optical axis center. Index modulations are formed in both the core region (11) and the inner cladding region (12) of the optical fiber (10) in each of a plurality of regions A1 to AN (N is an integer; N≧2) separated from each other along the longitudinal direction of the optical fiber (10). In the diffraction grating device (1), regions An (n=1 to N) in which index modulations are formed in both the core region (11) and the inner cladding region (12) and regions Bn (n=1 to N−1) in which no index modulations are formed alternately exist along the longitudinal direction.

    摘要翻译： 在衍射光栅装置（1）中，沿着用作光波导的光纤（10）的纵向形成指数调制。 光纤（10）从光轴中心顺序地具有芯区域（11），内包层区域（12）和外包层区域（13）。 在多个区域A1至AN（N为整数; N> = 2）中的每一个区域中，在光纤（10）的芯区域（11）和内包层区域（12）两者中形成索引调制 彼此沿着光纤（10）的纵向方向。 在衍射光栅装置（1）中，在核心区域（11）和内部包层区域（12）和区域Bn（n = 1〜N）中形成指数调制的区域An（n = 1〜N） 1）其中不形成指数调制沿纵向方向交替存在。

    Optical filter
    10.
    发明授权
    Optical filter 失效
    滤光片

    公开(公告)号：US6072927A

    公开(公告)日：2000-06-06

    申请号：US129623

    申请日：1998-08-05

    申请人： Toru Iwashima ,  Michiko Harumoto

    发明人： Toru Iwashima ,  Michiko Harumoto

    IPC分类号： G02B6/122 ,  G02B6/02 ,  G02B6/12 ,  G02B6/124 ,  G02B6/34

    CPC分类号： G02B6/29317 ,  G02B6/02085 ,  G02B6/124 ,  G02B6/29389 ,  G02B2006/12107 ,  G02B2006/12109 ,  G02B2006/12164

    摘要： In an optical filter formed with a grating whose refractive index fluctuates along an optical axis of an optical waveguide so as to reflect light in a predetermined wavelength band, assuming that a position in the grating area is defined by a positional coordinate value z which is standardized by -.pi. to .pi. in a light propagating direction, an amplitude .DELTA.n of refractive index changing width in z satisfies: ##EQU1## by use of predetermined parameters x.sub.1 and x.sub.2 and proportional constants k.sub.1 and k.sub.2, .DELTA.n monotonously increasing or decreasing depending on whether the expression -.pi..ltoreq.z.ltoreq.0 or 0.ltoreq.z.ltoreq..pi. is satisfied, respectively.

    摘要翻译： 在形成有折射率沿着光波导的光轴波动以便反射预定波长带的光的光栅的滤光器中，假设光栅区域中的位置由标准化的位置坐标值z 在光传播方向上，pi的折射率变化幅度的DELTA n满足：通过使用预定参数x1和x2以及比例常数k1和k2，DELTA n单调递增或减小，这取决于表达式 分别满足pi = z