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1. 发明授权

US06831749B2 Sagnac interferometer current sensor 失效
标题翻译： Sagnac干涉仪电流传感器
公开(公告)号：US06831749B2
公开(公告)日：2004-12-14
申请号：US10070076
申请日：2002-03-01
申请人： Aritaka Ohno , Ryuji Usui , Kiyohisa Terai , Masao Takahashi , Kinichi Sasaki
发明人： Aritaka Ohno , Ryuji Usui , Kiyohisa Terai , Masao Takahashi , Kinichi Sasaki
IPC分类号： G01B902
CPC分类号： G01R15/246 , G01R15/247
摘要： A depolarizer 11 is inserted between an optical branch unit 2 and a polarization filter 3, a depolarizer 12 and a polarization filter 14 are inserted between an optical phase modulator 5 and a quarter-wave plate 16, and a depolarizer 13 and a polarization filter 15 are inserted between the other branch end of the optical branch unit 4 and a quarter-wave plate 17. The optical branch unit 2 and the optical phase modulator 5 are formed by single mode optical fibers, and single mode optical fibers are used to connect between optical elements, thus providing an arrangement which is inexpensive as a whole.
摘要翻译：在光分支单元2和偏振滤光器3之间插入消偏振器11，在光相位调制器5和四分之一波片16之间插入去偏振器12和偏振滤光器14，以及去偏振器13和偏振滤光器15 插入在光分支单元4的另一分支端和四分之一波片17之间。光分支单元2和光相位调制器5由单模光纤形成，单模光纤用于连接光学元件，从而提供整体上廉价的布置。

2. 发明申请

US20100315621A1 PHASE MODULATOR, PHASE MODULATOR ASSEMBLY, AND PHOTOSENSOR 有权
标题翻译：相位调制器，相位调制器总成和光电传感器
公开(公告)号：US20100315621A1
公开(公告)日：2010-12-16
申请号：US12812320
申请日：2009-01-09
申请人： Kinichi Sasaki , Masao Takahashi , Masahiro Hamaguchi , Takashi Miyabe , Tsuyoshi Kuwabara , Tokihiro Umemura
发明人： Kinichi Sasaki , Masao Takahashi , Masahiro Hamaguchi , Takashi Miyabe , Tsuyoshi Kuwabara , Tokihiro Umemura
IPC分类号： G01N21/17 , G02F1/01 , G01N21/00
CPC分类号： G01C19/721 , G01D5/344 , G01D5/35351 , G01D5/3538 , G02B6/024 , G02B6/274 , G02F1/0134 , G02F2203/15 , G02F2203/50
摘要： The present invention provides a photosensor that uses a phase modulation technique for optical detection and conducts a highly accurate measurement. The photosensor uses a phase change difference of light propagated through a polarization preserving fiber with respect to tensile stress and employs proper polarization preserving fibers for a phase modulator 10, light-transmitting polarization preserving fiber 23, and coil-shaped polarization preserving fiber 30, to achieve a highly accurate measurement.
摘要翻译：本发明提供一种光传感器，其使用相位调制技术进行光学检测，并进行高精度的测量。光传感器使用相对于拉伸应力通过偏振保留光纤传播的光的相变差，并且对于相位调制器10，透光偏振保留光纤23和线圈状偏振保留光纤30采用适当的偏振保留光纤，实现高精度测量。

3. 发明授权

US08319958B2 Phase modulator, phase modulator assembly, and photosensor 有权
标题翻译：相位调制器，相位调制器组件和光电传感器
公开(公告)号：US08319958B2
公开(公告)日：2012-11-27
申请号：US12812320
申请日：2009-01-09
申请人： Kinichi Sasaki , Masao Takahashi , Masahiro Hamaguchi , Takashi Miyabe , Tsuyoshi Kuwabara , Tokihiro Umemura
发明人： Kinichi Sasaki , Masao Takahashi , Masahiro Hamaguchi , Takashi Miyabe , Tsuyoshi Kuwabara , Tokihiro Umemura
IPC分类号： G01N21/00
CPC分类号： G01C19/721 , G01D5/344 , G01D5/35351 , G01D5/3538 , G02B6/024 , G02B6/274 , G02F1/0134 , G02F2203/15 , G02F2203/50
摘要： The present invention provides a photosensor that uses a phase modulation technique for optical detection and conducts a highly accurate measurement. The photosensor uses a phase change difference of light propagated through a polarization preserving fiber with respect to tensile stress and employs proper polarization preserving fibers for a phase modulator 10, light-transmitting polarization preserving fiber 23, and coil-shaped polarization preserving fiber 30, to achieve a highly accurate measurement.
摘要翻译：本发明提供一种光传感器，其使用相位调制技术进行光学检测，并进行高精度的测量。光传感器使用相对于拉伸应力通过偏振保留光纤传播的光的相变差，并且对于相位调制器10，透光偏振保留光纤23和线圈状偏振保留光纤30采用适当的偏振保留光纤，实现高精度测量。

4. 发明授权

US08836950B2 SAGNAC interferometer-type fiber-optic current sensor 有权
标题翻译： SAGNAC干涉仪型光纤电流传感器
公开(公告)号：US08836950B2
公开(公告)日：2014-09-16
申请号：US12965147
申请日：2010-12-10
申请人： Kinichi Sasaki , Masao Takahashi , Yukihisa Hirata
发明人： Kinichi Sasaki , Masao Takahashi , Yukihisa Hirata
IPC分类号： G01B9/02 , G01R15/24
CPC分类号： G01R15/246 , G01D5/35322 , G01R19/0092
摘要： In one embodiment, a Sagnac interferometer-type fiber-optic sensor includes a synchronous detection circuit to carry out synchronous detection of detected light signal with a phase modulation angular frequency of a phase modulator. A signal processing circuit calculates and outputs the magnitude of current to be measured using the signal detected in the synchronous detection circuit. A phase modulator driving circuit controls the driving of the phase modulator. The phase modulator driving circuit controls a phase modulation depth of the phase modulator so that the amplitude of the second-order harmonics and the fourth-order harmonics obtained by carrying out the synchronous detection of the detected light signal with the phase modulation angular frequency becomes the same.
摘要翻译：在一个实施例中，Sagnac干涉仪型光纤传感器包括同步检测电路，以相位调制器的相位调制角频率对检测到的光信号进行同步检测。信号处理电路使用在同步检测电路中检测的信号来计算并输出要测量的电流的大小。相位调制器驱动电路控制相位调制器的驱动。相位调制器驱动电路控制相位调制器的相位调制深度，使得通过以相位调制角频率执行检测到的光信号的同步检测而获得的二次谐波和四次谐波的振幅变为相同。

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