公开(公告)号：US08285086B2

公开(公告)日：2012-10-09

申请号：US12529865

申请日：2008-01-07

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

IPC分类号： G02B6/00 ,  G02B6/34

CPC分类号： G01N21/774

摘要： An optical fiber sensor measuring refractive index of a medium with high sensitivity in a wide range. The optical fiber sensor includes an optical fiber causing a transmission loss due to leakage in the clad propagation mode from a portion of a core and a clad where a Bragg grating is provided, a light source permitting light in a wavelength band in the clad propagation mode to enter the optical fiber, and a light-receiving section receiving the transmitted or reflected light transmitted through the core and the clad at the portion where the Bragg grating is provided. The refractive index of the medium to be measured in contact with the clad is measured according to total intensity of the light received by the light-receiving section. The Bragg grating is inclined at a predetermined angle of inclination to the vertical line vertical to the length direction of the optical fiber.

摘要翻译： 测量宽范围高灵敏度介质折射率的光纤传感器。 光纤传感器包括光纤，该光纤引起由包层传播模式中的泄漏引起的传输损耗，其中芯部和布拉格光栅的包层部分，允许在覆盖传播模式中波长带的光的光源 以及光接收部分，其接收在布拉格光栅提供的部分处透射穿过芯体和包层的透射或反射光。 根据由光接收部接收的光的总强度来测量与包层接触的待测量介质的折射率。 布拉格光栅以与光纤的长度方向垂直的垂直线倾斜预定的倾斜角度。

公开(公告)号：US20100080502A1

公开(公告)日：2010-04-01

申请号：US12529865

申请日：2008-01-07

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

IPC分类号： G02B6/00

CPC分类号： G01N21/774

摘要： An optical fiber sensor measuring refractive index of a medium with high sensitivity in a wide range. The optical fiber sensor includes an optical fiber causing a transmission loss due to leakage in the clad propagation mode from a portion of a core and a clad where a Bragg grating is provided, a light source permitting light in a wavelength band in the clad propagation mode to enter the optical fiber, and a light-receiving section receiving the transmitted or reflected light transmitted through the core and the clad at the portion where the Bragg grating is provided. The refractive index of the medium to be measured in contact with the clad is measured according to total intensity of the light received by the light-receiving section. The Bragg grating is inclined at a predetermined angle of inclination to the vertical line vertical to the length direction of the optical fiber.

摘要翻译： 测量宽范围高灵敏度介质折射率的光纤传感器。 光纤传感器包括光纤，该光纤引起由包层传播模式中的泄漏引起的传输损耗，其中芯部和布拉格光栅的包层部分，允许在覆盖传播模式中波长带的光的光源 以及光接收部分，其接收在布拉格光栅提供的部分处透射穿过芯体和包层的透射或反射光。 根据由光接收部接收的光的总强度来测量与包层接触的待测量介质的折射率。 布拉格光栅以与光纤的长度方向垂直的垂直线倾斜预定的倾斜角度。

公开(公告)号：US08351029B2

公开(公告)日：2013-01-08

申请号：US12745815

申请日：2008-12-03

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

IPC分类号： G01N21/41 ,  G01J1/00

CPC分类号： G01N21/431 ,  G01D5/35383 ,  G01N2021/433 ,  G02B6/02085

摘要： An objective of the present invention is to provide an optical fiber sensor which has a simple configuration to enable sensitively measuring a refractive index of a measurement medium in a wide range of refractive indexes. An optical fiber sensor according to the present invention includes; an optical fiber having a core in which a short-period gratings are formed and a cladding, the optical fiber being made so that transmission loss occurs due to cladding-propagation-mode leakage at its cladding portion where the short-period gratings are formed; a light source from which light having a wavelength range of the cladding propagation mode is emitted; and a light receiving unit for receiving transmission or reflection light having passed through the cladding at the position where the short-period gratings are formed. The optical fiber sensor detects, based on the total receiving light intensity that the light receiving unit receives, the refractive index of the measurement medium contacting the cladding, in which the optical fiber is multi-mode one, and the short-period gratings have plural kinds of periods.

摘要翻译： 本发明的目的是提供一种光纤传感器，其具有能够在宽范围的折射率下敏感地测量测量介质的折射率的简单配置。 根据本发明的光纤传感器包括： 具有形成短周期光栅的芯的光纤和包层，使得在形成有短周期光栅的包层部分处的包层传播模式泄漏的情况下，使光纤发生传输损耗; 发射具有包层传播模式的波长范围的光的光源; 以及光接收单元，用于在形成短周期光栅的位置处接收穿过包层的透射或反射光。 光纤传感器基于光接收单元接收的总接收光强度来检测与光纤为多模光纤的包层接触的测量介质的折射率，短周期光栅具有多个 种类的时期。

公开(公告)号：US20100296080A1

公开(公告)日：2010-11-25

申请号：US12745815

申请日：2008-12-03

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

IPC分类号： G01N21/41

CPC分类号： G01N21/431 ,  G01D5/35383 ,  G01N2021/433 ,  G02B6/02085

摘要： An objective of the present invention is to provide an optical fiber sensor which has a simple configuration to enable sensitively measuring a refractive index of a measurement medium in a wide range of refractive indexes. An optical fiber sensor according to the present invention includes; an optical fiber having a core in which a short-period gratings are formed and a cladding, the optical fiber being made so that transmission loss occurs due to cladding-propagation-mode leakage at its cladding portion where the short-period gratings are formed; a light source from which light having a wavelength range of the cladding propagation mode is emitted; and a light receiving unit for receiving transmission or reflection light having passed through the cladding at the position where the short-period gratings are formed. The optical fiber sensor detects, based on the total receiving light intensity that the light receiving unit receives, the refractive index of the measurement medium contacting the cladding, in which the optical fiber is multi-mode one, and the short-period gratings have plural kinds of periods.

摘要翻译： 本发明的目的是提供一种光纤传感器，其具有能够在宽范围的折射率下敏感地测量测量介质的折射率的简单配置。 根据本发明的光纤传感器包括： 具有形成短周期光栅的芯的光纤和包层，使得在形成有短周期光栅的包层部分由于包层传播模式泄漏而发生传输损耗的光纤; 发射具有包层传播模式的波长范围的光的光源; 以及光接收单元，用于在形成短周期光栅的位置处接收穿过包层的透射或反射光。 光纤传感器基于光接收单元接收的总接收光强度来检测与光纤为多模光纤的包层接触的测量介质的折射率，短周期光栅具有多个 种类的时期。

公开(公告)号：US07672544B2

公开(公告)日：2010-03-02

申请号：US11914271

申请日：2006-05-22

申请人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

发明人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

IPC分类号： G02B6/00

CPC分类号： B60K15/077 ,  B60K2015/03217 ,  G01F23/292 ,  G01F23/2925 ,  G01N21/8507

摘要： An optical fiber sensor that can detect a liquid level or detect a property of liquid with high reliability even under a frequently vibrational environment. The optical fiber sensor includes an optical fiber that includes a core having an area where a grating is formed and a clad, the optical fiber being disposed so that at least a part of the area with the grating is immersed in liquid, a light source for making light incident to the optical fiber so that a cladding mode light having a wavelength band is generated by the grating, and a light receiving unit for detecting the intensity of light which is incident from the light source to the optical fiber and transmitted through the grating.

摘要翻译： 即使在频繁的振动环境下也能够高度可靠地检测液位或检测液体的性质的光纤传感器。 光纤传感器包括光纤，其包括具有形成光栅的区域的芯和包层，光纤被布置成使得具有光栅的区域的至少一部分浸没在液体中，光源用于 使光入射到光纤，使得由光栅产生具有波长带的包层模式光;以及光接收单元，用于检测从光源入射到光纤并透射通过光栅的光的强度 。

公开(公告)号：US20090034901A1

公开(公告)日：2009-02-05

申请号：US11914271

申请日：2006-05-22

申请人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

发明人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

IPC分类号： G02B6/00 ,  G01N21/00

CPC分类号： B60K15/077 ,  B60K2015/03217 ,  G01F23/292 ,  G01F23/2925 ,  G01N21/8507

摘要： An optical fiber sensor that can detect a liquid level or detect a property of liquid with high reliability even under a frequently vibrational environment. The optical fiber sensor includes an optical fiber that includes a core having an area where a grating is formed and a clad, and is disposed so that at least a part of the area with the grating is immersed in liquid, a light source for making light incident to the optical fiber so that a cladding mode light having a wavelength band is occurred by the grating, and a light receiving unit for detecting the intensity of light which is incident from the light source to the optical fiber and transmitted through the grating.

摘要翻译： 即使在频繁的振动环境下也能够高度可靠地检测液位或检测液体的性质的光纤传感器。 光纤传感器包括光纤，其包括具有形成光栅的区域的芯和包层，并且被布置成使得具有光栅的区域的至少一部分浸没在液体中，用于制造光的光源 入射到光纤，使得由光栅发生具有波长带的包层模式光;以及光接收单元，用于检测从光源入射到光纤并透射通过光栅的光的强度。

公开(公告)号：US06810179B2

公开(公告)日：2004-10-26

申请号：US10305157

申请日：2002-11-27

申请人： Takuya Ohira ,  Sadayuki Matsumoto ,  Kiichi Yoshiara ,  Masakazu Takabayashi ,  Junichiro Hoshizaki ,  Shigeru Matsuno ,  Ryosuke Namiki ,  Takashi Hashimoto

发明人： Takuya Ohira ,  Sadayuki Matsumoto ,  Kiichi Yoshiara ,  Masakazu Takabayashi ,  Junichiro Hoshizaki ,  Shigeru Matsuno ,  Ryosuke Namiki ,  Takashi Hashimoto

IPC分类号： G02B634

CPC分类号： G02B6/278 ,  G02B6/2932 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/29398

摘要： A variable dispersion compensator includes an optical waveguide, a temperature controller. The optical waveguide has a chirped grating having a Bragg wavelength changing along the longitudinal direction of the grating. A temperature distribution T1(x) is applied to a central portion of the grating, defined as a region where a distance x from an end of the grating is a range of 20 % to 80 % of total length of the grating. Temperature distribution T2(x) and T3(x) are applied to end portions of the grating, defined as two regions extending from respective ends of the grating to the central region, respectively. At least one of T2(x) and T3(x) has a distance dependence different from that of the T1(x).

摘要翻译： 可变色散补偿器包括光波导，温度控制器。 光波导具有沿着光栅的纵向方向改变的布拉格波长的啁啾光栅。 将温度分布T1（x）施加到光栅的中心部分，其被定义为距离光栅末端的距离x为光栅总长度的20％至80％的范围的区域。 温度分布T2（x）和T3（x）被施加到光栅的端部，其被定义为分别从光栅的两端延伸到中心区域的两个区域。 T2（x）和T3（x）中的至少一个具有与T1（x）不同的距离依赖性。

公开(公告)号：US06690860B2

公开(公告)日：2004-02-10

申请号：US09891319

申请日：2001-06-27

申请人： Sadayuki Matsumoto ,  Takuya Ohira ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Shigeru Matsuno ,  Hajime Takeya ,  Junichiro Hoshizaki

发明人： Sadayuki Matsumoto ,  Takuya Ohira ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Shigeru Matsuno ,  Hajime Takeya ,  Junichiro Hoshizaki

IPC分类号： G02B634

CPC分类号： G02B6/02152 ,  G02B6/02142

摘要： A method of manufacturing a grating in an optical waveguide that includes a core and a cladding covering the core. The method includes scanning a laser beam along an optical axis of the optical waveguide to modulate the refractive index of the core. The core is made of a material having a refractive index that is changeable upon irradiation by radiation. In addition, in scanning the core, the irradiation range of the laser beam is controlled and the core is scanned several times. Therefore, a predetermined distribution of irradiation is obtained in a direction of the optical axis of the grating.

摘要翻译： 一种在光波导中制造光栅的方法，该光波导包括芯和覆盖芯的包层。 该方法包括沿着光波导的光轴扫描激光束以调制芯的折射率。 芯由具有在辐射照射时可变化的折射率的材料制成。 此外，在扫描芯时，控制激光束的照射范围，并将核心扫描多次。 因此，在光栅的光轴的方向上获得预定的照射分布。

公开(公告)号：US06522809B1

公开(公告)日：2003-02-18

申请号：US09640000

申请日：2000-08-17

申请人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Sadayuki Matsumoto ,  Junichiro Hoshizaki ,  Takeyuki Maegawa ,  Hajime Takeya ,  Kiyohide Sakai ,  Minoru Hashimoto ,  Fusaoki Uchikawa

发明人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Sadayuki Matsumoto ,  Junichiro Hoshizaki ,  Takeyuki Maegawa ,  Hajime Takeya ,  Kiyohide Sakai ,  Minoru Hashimoto ,  Fusaoki Uchikawa

IPC分类号： G02B634

CPC分类号： G02B6/022 ,  G02B6/124

摘要： A waveguide grating device controlling Bragg wavelength after manufacture of the device includes an optical waveguide on a substrate. A variable stress is applied to a waveguide grating in part of the waveguide to bend at least the portion of the substrate including the waveguide grating, changing the Bragg wavelength.

摘要翻译： 在器件制造之后控制布拉格波长的波导光栅器件包括在衬底上的光波导。 在波导的一部分中的波导光栅上施加可变应力以使包括波导光栅的至少一部分基板弯曲，从而改变布拉格波长。

公开(公告)号：US07379640B2

公开(公告)日：2008-05-27

申请号：US11410925

申请日：2006-04-26

申请人： Sadayuki Matsumoto ,  Yasuhisa Shimakura ,  Kiichi Yoshiara ,  Masakazu Takabayashi

发明人： Sadayuki Matsumoto ,  Yasuhisa Shimakura ,  Kiichi Yoshiara ,  Masakazu Takabayashi

IPC分类号： G02B6/34

CPC分类号： G02F1/0115 ,  G02B6/29322 ,  G02B6/29394 ,  G02B6/29395 ,  G02F1/0147 ,  G02F2201/30

摘要： A tunable dispersion compensator in which a heater portion can be easily constructed to reduce cost. A tunable dispersion compensator includes: an optical fiber having a grating portion; a heating unit for heating the grating portion to apply a temperature distribution to the grating portion; and a control unit for controlling the temperature distribution applied by the heating unit to control the group delay time characteristic of the grating portion. The heating unit includes: a heater including a single conductor having electrical resistors and which extends in a longitudinal direction of the grating portion over at least the entire length of the grating portion; and wirings electrically connected with the heater in respective positions along the longitudinal direction. The control unit supplies a voltage to each of the wirings.

摘要翻译： 可调谐色散补偿器，其中可以容易地构造加热器部分以降低成本。 可调谐色散补偿器包括：具有光栅部分的光纤; 加热单元，用于加热光栅部分以向光栅部分施加温度分布; 以及控制单元，用于控制由加热单元施加的温度分布，以控制光栅部分的群延迟时间特性。 加热单元包括：加热器，其包括具有电阻器的单个导体，并且在光栅部分的至少整个长度上沿光栅部分的纵向方向延伸; 以及沿着纵向在相应位置与加热器电连接的布线。 控制单元向每个配线提供电压。