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公开(公告)号：WO0037914A9
公开(公告)日：2001-03-29
申请号：PCT/US9928868
申请日：1999-12-06
Applicant: CIDRA CORP
Inventor： FERNALD MARK R , BAILEY TIMOTHY J , MILLER MATTHEW B , SULLIVAN JAMES M , DUNPHY JAMES R , DAVIS MICHAEL A , KERSEY ALAN D , WRIGHT CHRISTOPHER J , PUTNAM MARTIN A , BRUCATO ROBERT N , SANDERS PAUL E
CPC classification number: G01L11/025
Abstract: A fiber grating pressure sensor includes an optical sensing element (20, 600) which includes an optical fiber (10) having a Bragg grating (12) impressed therein which is encased within and fused to at least a portion of a glass capillary tube (20) and/or a large diameter waveguide grating (600) having a core and a wide cladding and which has an outer transverse dimension of at least 0.3 mm. Light (14) is incident on the grating (12) and light (16) is reflected from the grating (12) at a reflection wavelength lambda 1. The sensing element (20, 600) may be used by itself as a sensor or located within a housing (48, 60, 90, 270, 300). When external pressure P increases, the grating (12) is compressed and the reflection wavelength lambda 1 changes.
Abstract translation: 光纤光栅压力传感器包括光学传感元件（20,600），光学传感元件（20,600）包括其中印有布拉格光栅（12）的光纤（10），其被封装在玻璃毛细管（20）的至少一部分内 ）和/或具有芯和宽包层并且具有至少0.3mm的外横向尺寸的大直径波导光栅（600）。 光（14）入射到光栅（12）上，光（16）以反射波长λ1从光栅（12）反射。感测元件（20,600）可以自身用作传感器或定位 在一个房屋内（48,60,90,270,300）。 当外部压力P增加时，光栅（12）被压缩，反射波长λ1改变。
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Patent Agency Ranking
公开(公告)号：WO0037976A3
公开(公告)日：2001-02-22
申请号：PCT/US9928813
申请日：1999-12-04
Applicant: CIDRA CORP
Inventor： PUTNAM MARTIN A , BAILEY TIMOTHY J , MILLER MATTHEW B , SULLIVAN JAMES M , DAVIS MICHAEL A , FERNALD MARK R , WRIGHT CHRISTOPHER J
CPC classification number: G02B6/02133 , G02B2006/02161
Abstract: A method and apparatus for forming a tube-encased fiber grating includes an optical fiber (28) which is encased within and fused to at least a portion of a glass capillary tube (120) and a substantially transparent index-matching medium (122), such as an optically flat window, having an optically flat surface (126) adjacent to the tube (120). A substantially transparent index-matching intermediate material (e.g., UV transparent oil) (124) is used between the window (22) and the tube (120) to substantially eliminate the interface between the tube (120) and the medium (122). A pair of writing beams (26, 34) are incident on and pass through the medium (122), the tube (120) and intersect and interfere in a region (30) on the fiber (28). Also, the width (Wb) of the writing beams (26,34) may be set to be less than the width (Woil) of the intermediate material (124) to eliminate surface damage (ablations) of the tube (120). Alternatively, the medium (122) may have a geometry to eliminate surface ablations (e.g., a collar shape) and/or to match the shape of the tube (120). More than one grating or pair of gratings may be written in the tube-encased fiber or one or more gratings may be formed in multiple fibers (28, 250) encased in the tube (120). Further, high intensity writing beams (26, 34) on the fiber (28) may be achieved by having the medium (122) have a predetermined thickness (T).
Abstract translation: 用于形成管封装光纤光栅的方法和装置包括：光纤（28），其被包裹在玻璃毛细管（120）和基本上透明的折射率匹配介质（122）的至少一部分内并且熔合到其中， 例如光学平面窗口，其具有与管（120）相邻的光学平坦表面（126）。 在窗（22）和管（120）之间使用基本上透明的折射率匹配中间材料（例如UV透明油）（124），以基本上消除管（120）和介质（122）之间的界面。 一对书写光束（26,34）入射并通过介质（122），管（120）并交叉并干涉在光纤（28）上的区域（30）中。 此外，书写光束（26,34）的宽度（Wb）可以设定为小于中间材料（124）的宽度（Woil），以消除管（120）的表面损伤（烧蚀）。 或者，介质（122）可以具有消除表面消融（例如，套环形状）和/或匹配管（120）的形状的几何形状。 可以将多于一个的光栅或一对光栅写入管封装的光纤中，或者一个或多个光栅可以形成在封装在管（120）中的多个光纤（28,250）中。 此外，纤维（28）上的高强度书写光束（26,34）可以通过使介质（122）具有预定厚度（T）来实现。
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公开(公告)号：WO0037976A9
公开(公告)日：2000-12-07
申请号：PCT/US9928813
申请日：1999-12-04
Applicant: CIDRA CORP
Inventor： PUTNAM MARTIN A , BAILEY TIMOTHY J , MILLER MATTHEW B , SULLIVAN JAMES M , DAVIS MICHAEL A , FERNALD MARK R , WRIGHT CHRISTOPHER J
CPC classification number: G02B6/02133 , G02B2006/02161
Abstract: A method and apparatus for forming a tube-encased fiber grating includes an optical fiber (28) which is encased within and fused to at least a portion of a glass capillary tube (120) and a substantially transparent index-matching medium (122), such as an optically flat window, having an optically flat surface (126) adjacent to the tube (120). A substantially transparent index-matching intermediate material (e.g., UV transparent oil) (124) is used between the window (22) and the tube (120) to substantially eliminate the interface between the tube (120) and the medium (122). A pair of writing beams (26, 34) are incident on and pass through the medium (122), the tube (120) and intersect and interfere in a region (30) on the fiber (28). Also, the width (Wb) of the writing beams (26,34) may be set to be less than the width (Woil) of the intermediate material (124) to eliminate surface damage (ablations) of the tube (120). Alternatively, the medium (122) may have a geometry to eliminate surface ablations (e.g., a collar shape) and/or to match the shape of the tube (120). More than one grating or pair of gratings may be written in the tube-encased fiber or one or more gratings may be formed in multiple fibers (28, 250) encased in the tube (120). Further, high intensity writing beams (26, 34) on the fiber (28) may be achieved by having the medium (122) have a predetermined thickness (T).
Abstract translation: 一种用于形成套管式光纤光栅的方法和设备，包括：包封在玻璃毛细管（120）和基本上透明的折射率匹配介质（122）的至少一部分内并与之熔合的光纤（28） 如光学平坦的窗口，其具有与管（120）相邻的光学平坦表面（126）。 在窗口（22）和管（120）之间使用基本上透明的折射率匹配中间材料（例如UV透明油）（124）以基本上消除管（120）和介质（122）之间的界面。 一对写入光束（26,34）入射并穿过介质（122），管（120）并与光纤（28）上的区域（30）相交并干涉。 而且，书写射束（26,34）的宽度（Wb）可以设定为小于中间材料（124）的宽度（Woil）以消除管（120）的表面损伤（烧蚀）。 或者，介质（122）可具有消除表面消融（例如，套环形状）和/或与管（120）的形状匹配的几何形状。 多于一个的光栅或一对光栅可以被写入管封装的光纤中，或者一个或多个光栅可以被形成在被封装在管（120）中的多个光纤（28,250）中。 此外，纤维（28）上的高强度写入光束（26,34）可以通过使介质（122）具有预定厚度（T）来实现。
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公开(公告)号：WO0039548A3
公开(公告)日：2000-09-21
申请号：PCT/US9928866
申请日：1999-12-06
Applicant: CIDRA CORP
Inventor： WRIGHT CHRISTOPHER J , BAILEY TIMOTHY J , FERNALD MARK R , SULLIVAN JAMES M , DAVIS MICHAEL A , DUNPHY JAMES R , KERSEY ALAN D , PUTNAM MARTIN A , BRUCATO ROBERT N , SANDERS PAUL E
IPC: G01K11/32
CPC classification number: G01K11/32
Abstract: A strain-isolated Bragg grating temperature sensor includes an optical sensing element (20, 600) which includes an optical fiber (10) having at least one Bragg grating (12) disposed therein which is encased within and fused to at least a portion of a glass capillary tube (20) and/or a large diameter waveguide grating (600) having a core and a wide cladding and having the grating (12) disposed therein, which senses temperature changes but is substantially not sensitive to strains on the element caused by the fiber or other effects. Light (14) is incident on the grating (12) and light (16) is reflected at a reflection wavelength lambda 1. The shape of the sensing element (20, 600) may be other geometries and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used or more than one fiber or optical core may be used. At least a portion of the element (20, 600) may be doped between a pair of gratings (150, 152), disposed therein to form a temperature tuneable laser or the grating (12) or gratings (150, 152) may be constructed as a temperature tuneable DFB laser disposed in the element. Also, the element may have an inner or outer tapered regions (22, 27), respectively, to provide strain relief and/or added pull strength for the fiber (10). Further, the fiber (10) and the tube (20) may be made of different coefficients of thermal expansion for increased sensitivity.
Abstract translation: 一种应变隔离布拉格光栅温度传感器包括光学传感元件（20,600），该光学传感元件包括光纤（10），光纤（10）中布置有至少一个布拉格光栅（12），所述布拉格光栅（12）被包封在并且熔合到至少一部分 玻璃毛细管（20）和/或大直径波导光栅（600），其具有芯和宽包层并且具有设置在其中的光栅（12），其检测温度变化但基本上不会对由 纤维或其他影响。 光（14）入射在光栅（12）上并且光（16）以反射波长λ1反射。感测元件（20,600）的形状可以是其他几何形状和/或多于一个的同心管可以 或者可以使用多于一个光栅或一对光栅，或者可以使用多于一个的光纤或光学芯。 元件（20,600）的至少一部分可以被掺杂在设置在其中的一对光栅（150,152）之间以形成温度可调激光器，或者光栅（12）或光栅（150,152）可以被构造 作为设置在元件中的温度可调的DFB激光器。 而且，该元件可分别具有内部或外部锥形区域（22,27），以为光纤（10）提供应力消除和/或增加的拉力。 此外，为了提高灵敏度，纤维（10）和管（20）可以由不同的热膨胀系数构成。
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公开(公告)号：WO0033034A9
公开(公告)日：2001-04-05
申请号：PCT/US9928867
申请日：1999-12-06
Applicant: CIDRA CORP
Inventor： FERNALD MARK R , BAILEY TIMOTHY J , WRIGHT CHRISTOPHER J , SULLIVAN JAMES M , JONES RICHARD T , KERSEY ALAN D , PUTNAM MARTIN A , BRUCATO ROBERT N , SANDERS PAUL E
CPC classification number: G01K11/3206 , G01D5/35316 , G01K5/52
Abstract: A pressure-isolated Bragg grating temperature sensor includes an optical element (20, 600) which includes an optical fiber (10) having at least one Bragg grating (12) disposed therein which is encased within and fused to at least a portion of an inner glass capillary tube (20) and/or a large diameter waveguide grating (600) having a core and a wide cladding and having the grating (12) disposed therein, which is encased within an outer tube (40) to form a chamber (44). An extended portion (58) of the sensing element that has the grating (12) therein extends inwardly into the chamber (44) which allows the grating (12) to sense temperature changes but isolates the grating (12) from external pressure. An end tube (42) may be attached to the tube (40) and the fiber (10) fed therethrough to form the chamber (44) and a pass-through for the fiber (10). As the external pressure P increases, the outer tube (40) compresses or deflects, the sensing element (20, 600) moves closer to the end tube (42) and/or the outer tube (40) move toward each other. More than one grating or pair of gratings may be used and more than one fiber or optical core may be used. Also, at least a portion of the sensing element may be doped between a pair of gratings (150, 152), to form a temperature tuned laser or the grating (12) or gratings (150, 152) may be configured as a tunable DFB laser disposed in the sensing element.
Abstract translation: 压力隔离布拉格光栅温度传感器包括光学元件（20,600），该光学元件包括具有设置在其中的至少一个布拉格光栅（12）的光纤（10），所述布拉格光栅（12）被封装在内部并被熔合到内部的至少一部分 玻璃毛细管（20）和/或具有芯和宽包层并且具有设置在其中的光栅（12）的大直径波导光栅（600），其被封装在外管（40）内以形成室（44） ）。 其中具有光栅（12）的感测元件的延伸部分（58）向内延伸进入室（44），允许光栅（12）感测温度变化，但将光栅（12）与外部压力隔离。 端管（42）可以连接到管（40），并且通过其馈送的纤维（10）形成室（44）和用于纤维（10）的通过。 当外部压力P增加时，外部管（40）压缩或偏转，感测元件（20,600）更靠近端部管道（42）和/或外部管道（40）彼此移动。 可以使用多于一个的光栅或一对光栅，并且可以使用多于一个的光纤或光纤。 此外，感测元件的至少一部分可以掺杂在一对光栅（150,152）之间，以形成温度调谐的激光器，或者光栅（12）或光栅（150,152）可被配置为可调谐DFB 激光器设置在传感元件中。
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公开(公告)号：WO0037976A8
公开(公告)日：2000-08-10
申请号：PCT/US9928813
申请日：1999-12-04
Applicant: CIDRA CORP
Inventor： PUTNAM MARTIN A , BAILEY TIMOTHY J , MILLER MATTHEW B , SULLIVAN JAMES M , DAVIS MICHAEL A , FERNALD MARK R , WRIGHT CHRISTOPHER J
CPC classification number: G02B6/02133 , G02B2006/02161
Abstract: A method and apparatus for forming a tube-encased fiber grating includes an optical fiber (28) which is encased within and fused to at least a portion of a glass capillary tube (120) and a substantially transparent index-matching medium (122), such as an optically flat window, having an optically flat surface (126) adjacent to the tube (120). A substantially transparent index-matching intermediate material (e.g., UV transparent oil) (124) is used between the window (22) and the tube (120) to substantially eliminate the interface between the tube (120) and the medium (122). A pair of writing beams (26, 34) are incident on and pass through the medium (122), the tube (120) and intersect and interfere in a region (30) on the fiber (28). Also, the width (Wb) of the writing beams (26,34) may be set to be less than the width (Woil) of the intermediate material (124) to eliminate surface damage (ablations) of the tube (120). Alternatively, the medium (122) may have a geometry to eliminate surface ablations (e.g., a collar shape) and/or to match the shape of the tube (120). More than one grating or pair of gratings may be written in the tube-encased fiber or one or more gratings may be formed in multiple fibers (28, 250) encased in the tube (120). Further, high intensity writing beams (26, 34) on the fiber (28) may be achieved by having the medium (122) have a predetermined thickness (T).
Abstract translation: 用于形成管封装光纤光栅的方法和装置包括：光纤（28），其被包裹在玻璃毛细管（120）和基本上透明的折射率匹配介质（122）的至少一部分内并且熔合到其中， 例如光学平面窗口，其具有与管（120）相邻的光学平坦表面（126）。 在窗（22）和管（120）之间使用基本上透明的折射率匹配中间材料（例如UV透明油）（124），以基本上消除管（120）和介质（122）之间的界面。 一对书写光束（26,34）入射并通过介质（122），管（120）并交叉并干涉在光纤（28）上的区域（30）中。 此外，书写光束（26,34）的宽度（Wb）可以设定为小于中间材料（124）的宽度（Woil），以消除管（120）的表面损伤（烧蚀）。 或者，介质（122）可以具有消除表面消融（例如，套环形状）和/或匹配管（120）的形状的几何形状。 可以将多于一个的光栅或一对光栅写入管封装的光纤中，或者一个或多个光栅可以形成在封装在管（120）中的多个光纤（28,250）中。 此外，纤维（28）上的高强度书写光束（26,34）可以通过使介质（122）具有预定厚度（T）来实现。
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