公开(公告)号：WO9939214A9

公开(公告)日：1999-12-23

申请号：PCT/US9901982

申请日：1999-01-29

Applicant: CIDRA CORP

Inventor： JONES RICHARD T ,  MARON ROBERT J ,  DAIGLE GUY A

IPC: G01P15/093 ,  G01P15/18 ,  G01P15/08 ,  G01P15/00

CPC classification number: G01P15/18 ,  G01P15/093

Abstract: An accelerometer has a main body in combination with one or more Bragg grating sensors respectively arranged along one or more axes. The main body has a mass that responds to an acceleration in one or more axes. The compression or stretching of a Bragg grating sensor causes a wavelength shift in the optical signal that contains information about the acceleration and that is sensed by a detector.

Abstract translation: 加速度计具有与沿一个或多个轴分别布置的一个或多个布拉格光栅传感器组合的主体。 主体具有响应一个或多个轴上的加速度的质量。 布拉格光栅传感器的压缩或拉伸导致光信号中的波长偏移，其包含关于加速度的信息并且由检测器感测。

公开(公告)号：WO0138838A9

公开(公告)日：2002-07-04

申请号：PCT/US0031717

申请日：2000-11-20

Applicant: CIDRA CORP

Inventor： DAVIS MICHAEL A ,  FOURNIER DAVID R ,  JONES RICHARD T

IPC: G01K1/20 ,  G01K11/32

CPC classification number: G01K1/20 ,  G01K11/32

Abstract: A fiber Bragg grating reference module provides a precise temperature reference for a temperature probe, including a thermistor, located in close proximity thereto, and includes an optical fiber having a fiber Bragg grating therein, a glass element and a reference housing. The fiber Bragg grating has two ends and with a coefficient of thermal expansion. The glass element anchors the two ends of the fiber Bragg grating, and has a substantially similar coefficient of thermal expansion as the coefficient of thermal expansion of the fiber Bragg grating to ensure that the glass element does not substantially induce strain on the fiber Bragg grating as the ambient temperature changes. The reference housing has a cavity and also has a means for receiving and affixing one end of the fiber Bragg grating and for suspending the fiber Bragg grating in the cavity leaving the other end of the fiber Bragg grating free to move as the ambient temperature changes without inducing strain in the fiber Bragg grating. The glass element includes a glass tube collapsed over the entire length of the fiber Bragg grating.

Abstract translation: 光纤布拉格光栅参考模块为温度探头提供精确的温度基准，包括位于其附近的热敏电阻，并包括其中具有光纤布拉格光栅的光纤，玻璃元件和参考外壳。 光纤布拉格光栅具有两端和热膨胀系数。 玻璃元件锚定光纤布拉格光栅的两端，并且具有与光纤布拉格光栅的热膨胀系数基本相似的热膨胀系数，以确保玻璃元件基本上不会在光纤布拉格光栅上引起应变 环境温度变化。 参考壳体具有空腔并且还具有用于接收和固定光纤布拉格光栅的一端并用于将光纤布拉格光栅悬挂在腔中的装置，离开光纤布拉格光栅的另一端随着环境温度的变化而自由移动，而没有 在光纤布拉格光栅中诱发应变。 玻璃元件包括在光纤布拉格光栅的整个长度上折叠的玻璃管。

公开(公告)号：WO0167142A3

公开(公告)日：2002-02-28

申请号：PCT/US0105644

申请日：2001-02-22

Applicant: CIDRA CORP

Inventor： SULLIVAN JAMES M ,  BAILEY TIMOTHY J ,  BRUCATO ROBERT N ,  ENGEL THOMAS W ,  FERNALD MARK R ,  JONES RICHARD T ,  KERSEY ALAN D ,  MACDOUGALL TREVOR ,  MILLER MATTHEW B ,  PUTNAM MARTIN A ,  SANDERS PAUL E ,  SIRKIS JAMES S

IPC: G02B6/00 ,  G02F1/01 ,  H01S3/067 ,  H01S3/102 ,  G02B6/16 ,  G02B6/293

CPC classification number: G02F1/0115 ,  G02B6/0218 ,  H01S3/0675 ,  H01S3/1028

Abstract: A temperature compensated optical device includes a compression-tuned glass element (10) having a Bragg grating (12) therein, a compensating material spacer (26) and an end cap (28) all held within an outer shell (30). The element (10), end cap (28) and shell (30) are made of a material having a low coefficient of thermal expansion (CTE), e.g., silica, quartz, etc. And the spacer (26) is made of a material having a higher CTE, e.g. metal Pyrex3, ceramic, etc. The material and length L5 of the spacer (26) is selected to offset the upward grating wavelength shift due to temperature. As temperature rises, the spacer (26) expands faster than the silica structure causing a compressive strain to be exerted on the element (10), which shifts the wavelength of the grating (12) down to balance the intrinsic temperature induces wavelength shift up. As a result, the grating (12) wavelength is substantially unchanged over a wide temperature range. The element (10) includes either an optical fiber having at least one Bragg grating (12) impressed therein encased within and fused to at least a portion of a glass capillary tube or a large diameter waveguide (or cane) with a grating (12) having a core (11) and a wide cladding, which does not buckle over a large range of compressive axial strains. The element may have a "dogbone" shape to amplify compressive strain on the grating (12). The device (8) may also be placed in an axially tunable system that allows the wavelength to be dynamically tuned while remaining athermal. In addition to a grating, the device may be an athermal laser, DFB laser, etc. Also, the entire device (8) may be all made of monolithic glass materials.

Abstract translation: 温度补偿光学器件包括其中具有布拉格光栅（12）的压缩调谐玻璃元件（10），补偿材料间隔物（26）和端盖（28），其全部保持在外壳（30）内。 元件（10），端帽（28）和壳体（30）由具有低热膨胀系数（CTE）的材料制成，例如二氧化硅，石英等。并且间隔件（26）由 具有较高CTE的材料，例如 金属Pyrex3，陶瓷等。选择间隔物（26）的材料和长度L5以抵消由于温度引起的向上的光栅波长偏移。 随着温度升高，间隔物（26）比二氧化硅结构膨胀得快，导致施加在元件（10）上的压缩应变，其使光栅（12）的波长向下移动以平衡本征温度，从而引起波长向上移动。 结果，光栅（12）波长在宽的温度范围内基本上不变。 元件（10）包括具有至少一个布拉格光栅（12）的光纤，该光纤封装在玻璃毛细管或具有光栅（12）的玻璃毛细管或大直径波导（或甘蔗）的至少一部分内并且被熔化） 具有芯（11）和宽包层，其在大范围的压缩轴向应变下不扣合。 元件可以具有“狗骨”形状以放大光栅（12）上的压缩应变。 设备（8）也可以放置在轴向可调谐系统中，该系统允许波长被动态地调谐而保持不燃。 除了光栅之外，该器件可以是无热激光器，DFB激光器等。此外，整个器件（8）可以全部由单片玻璃材料制成。

公开(公告)号：WO9939214A8

公开(公告)日：1999-11-18

申请号：PCT/US9901982

申请日：1999-01-29

Applicant: CIDRA CORP

Inventor： JONES RICHARD T ,  MARON ROBERT J ,  DAIGLE GUY A

IPC: G01P15/093 ,  G01P15/18 ,  G01P15/08 ,  G01P15/00

CPC classification number: G01P15/18 ,  G01P15/093

Abstract: An accelerometer has a main body in combination with one or more Bragg grating sensors respectively arranged along one or more axes. The main body has a mass that responds to an acceleration in one or more axes. The compression or stretching of a Bragg grating sensor causes a wavelength shift in the optical signal that contains information about the acceleration and that is sensed by a detector.

Abstract translation: 加速度计具有与分别沿一个或多个轴布置的一个或多个布拉格光栅传感器组合的主体。 主体有一个质量块，可以响应一个或多个轴的加速度。 布拉格光栅传感器的压缩或伸展引起光信号中的波长偏移，其包含关于加速度的信息并且由检测器感测。

公开(公告)号：WO0138838A2

公开(公告)日：2001-05-31

申请号：PCT/US0031717

申请日：2000-11-20

Applicant: CIDRA CORP

Inventor： DAVIS MICHAEL A ,  FOURNIER DAVID R ,  JONES RICHARD T

IPC: G01K1/20 ,  G01K11/32 ,  G01K

CPC classification number: G01K1/20 ,  G01K11/32

Abstract: A fiber Bragg grating reference module provides a precise temperature reference for a temperature probe, including a thermistor, located in close proximity thereto, and includes an optical fiber having a fiber Bragg grating therein, a glass element and a reference housing. The fiber Bragg grating has two ends and with a coefficient of thermal expansion. The glass element anchors the two ends of the fiber Bragg grating, and has a substantially similar coefficient of thermal expansion as the coefficient of thermal expansion of the fiber Bragg grating to ensure that the glass element does not substantially induce strain on the fiber Bragg grating as the ambient temperature changes. The reference housing has a cavity and also has a means for receiving and affixing one end of the fiber Bragg grating and for suspending the fiber Bragg grating in the cavity leaving the other end of the fiber Bragg grating free to move as the ambient temperature changes without inducing strain in the fiber Bragg grating. The glass element includes a glass tube collapsed over the entire length of the fiber Bragg grating. Alternatively, the glass element includes a glass tube locally collapsed at the two ends of the fiber Bragg grating over a part of length of the fiber Bragg grating.

Abstract translation: 光纤布拉格光栅参考模块为温度探头提供精确的温度基准，包括位于其附近的热敏电阻，并包括其中具有光纤布拉格光栅的光纤，玻璃元件和参考外壳。 光纤布拉格光栅具有两端和热膨胀系数。 玻璃元件锚定光纤布拉格光栅的两端，并且具有与光纤布拉格光栅的热膨胀系数基本相似的热膨胀系数，以确保玻璃元件基本上不会在光纤布拉格光栅上引起应变 环境温度变化。 参考壳体具有空腔并且还具有用于接收和固定光纤布拉格光栅的一端并用于将光纤布拉格光栅悬挂在腔中的装置，离开光纤布拉格光栅的另一端随着环境温度的变化而自由移动，而没有 在光纤布拉格光栅中诱发应变。 玻璃元件包括在光纤布拉格光栅的整个长度上折叠的玻璃管。 或者，玻璃元件包括在纤维布拉格光栅的长度的一部分上在纤维布拉格光栅的两端局部塌缩的玻璃管。

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

IPC: G01D5/353 ,  G01K5/52 ,  G01K11/32

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。