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1. 发明申请

US20100296080A1 OPTICAL FIBER SENSOR 失效
标题翻译：光纤传感器
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。

2. 发明授权

US08351029B2 Optical fiber sensor 失效
标题翻译：光纤传感器
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。

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