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    • 8. 发明授权
    • Tube-encased fiber grating
    • 管状光纤光栅
    • US06519388B1
    • 2003-02-11
    • US09455865
    • 1999-12-06
    • Mark R. FernaldTimothy J. BaileyMatthew B. MillerJames M. SullivanMichael A. DavisPeter OgleAlan D. KerseyMartin A. PutnamRobert N. BrucatoPaul E. Sanders
    • Mark R. FernaldTimothy J. BaileyMatthew B. MillerJames M. SullivanMichael A. DavisPeter OgleAlan D. KerseyMartin A. PutnamRobert N. BrucatoPaul E. Sanders
    • G02B634
    • G02B6/022G02B6/0218
    • A tube-encased fiber grating includes an optical fiber 10 having at least one Bragg grating 12 impressed therein which is embedded within a glass capillary tube 20. Light 14 is incident on the grating 12 and light 16 is reflected at a reflection wavelength &lgr;1. The shape of the tube 20 may be other geometries (e.g., a “dogbone” shape) and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used. The fiber 10 may be doped at least between a pair of gratings 150,152, encased in the tube 20 to form a tube-encased compression-tuned fiber laser or the grating 12 or gratings 150,152 may be constructed as a tunable DFB fiber laser encased in the tube 20. Also, the tube 20 may have an inner region 22 which is tapered away from the fiber 10 to provide strain relief for the fiber 10, or the tube 20 may have tapered (or fluted) sections 27 which have an outer geometry that decreases down to the fiber 10 and provides added fiber pull strength. Also, the tube-encased grating 12 exhibits lower mode coupling from the fiber core to the cladding modes due to the increased diameter of the cladding where the tube 20 is fused to the fiber 10 where the grating is located 12.
    • 管状光纤光栅包括光纤10,其具有嵌入其中的至少一个布拉格光栅12,该布拉格光栅12嵌入玻璃毛细管20内。光14入射到光栅12上,光16以反射波长lambd1反射。 管20的形状可以是其他几何形状(例如,“狗骨”形状)和/或可以使用多于一个的同心管,或者可以使用多于一个的光栅或一对光栅。 纤维10可以至少掺杂在一对光栅150,152之间,封装在管20中以形成管封装的压缩调谐光纤激光器,或者光栅12或光栅150,152可被构造为包含在该光纤12中的可调DFB光纤激光器。 管20也可以具有内部区域22,该内部区域22远离纤维10逐渐变细,以为纤维10提供应变消除,或者管20可以具有锥形(或凹槽)部分27,其具有外部几何形状 降低到纤维10并提供增加的纤维拉伸强度。 此外,由于包层的直径增加,管20被熔合到光栅位于12处的光纤10,管状光栅12表现出从纤维芯到包层模式的较低模式耦合。
    • 9. 发明授权
    • Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors
    • 用于使用可配置的传感器阵列测量在管内流动的流体的参数的方法和装置
    • US07882750B2
    • 2011-02-08
    • US11890322
    • 2007-08-06
    • Michael A. DavisMark R. FernaldTimothy J. Bailey
    • Michael A. DavisMark R. FernaldTimothy J. Bailey
    • G01F1/20
    • G01F1/7082
    • An apparatus for measuring at least one parameter associated with a fluid flowing within a pipe includes a single sheet of piezoelectric film material wrapped around at least a portion of the pipe and an array of sensors disposed at different locations on the film material. Each of the sensors provides a signal indicative of pressure within the pipe at a corresponding axial and/or circumferential location of the pipe. The sensors are selectively configurable to provide the pressure signals. The signals are processed to determine the parameter. The array of sensors is configurable in response to different criteria. The criteria includes at least one of the parameter of the fluid to be output, an input signal specifying sensors to be selected, a predetermined configuration based on the parameter to be determined, and in response to a previously determined parameter of the fluid.
    • 用于测量与在管道内流动的流体相关联的至少一个参数的装置包括缠绕在管的至少一部分上的单片压电膜材料和设置在膜材料上的不同位置的传感器阵列。 每个传感器提供在管道的相应轴向和/或周向位置处指示管内的压力的信号。 传感器可选择性地配置以提供压力信号。 处理信号以确定参数。 传感器阵列可根据不同的标准进行配置。 标准包括要输出的流体的参数,要选择的传感器的输入信号,基于要确定的参数的预定配置以及响应于先前确定的流体参数的至少一个。
    • 10. 发明授权
    • Compression-tuned Bragg grating and laser
    • 压缩调谐布拉格光栅和激光
    • US06363089B1
    • 2002-03-26
    • US09691997
    • 2000-10-19
    • Mark R. FernaldTimothy J. BaileyMatthew B. MillerJames M. SullivanMichael A. DavisRobert N. BrucatoMartin A. PutnamAlan D. KerseyPaul E. Sanders
    • Mark R. FernaldTimothy J. BaileyMatthew B. MillerJames M. SullivanMichael A. DavisRobert N. BrucatoMartin A. PutnamAlan D. KerseyPaul E. Sanders
    • H01S310
    • G02F1/0115G02B6/0218G02B6/022G02F1/0128G02F2201/307
    • A compression-tuned bragg grating includes a tunable optical element 20,600 which includes either an optical fiber 10 having at least one Bragg grating 12 impressed therein encased within and fused to at least a portion of a glass capillary tube 20or a large diameter waveguide grating 600 having a core and a wide cladding. Light 14 is incident on the grating 12 and light 16 is reflected at a reflection wavelength &lgr;1. The tunable element 20,600 is axially compressed which causes a shift in the reflection wavelength of the grating 12 without buckling the element. The shape of the element may be other geometries (e.g., a “dogbone” shape) and/or more than one grating or pair of gratings may be used and more than one fiber 10 or core 612 may be used. At least a portion of the element may be doped between a pair of gratings 150,152, to form a compression-tuned laser or the grating 12 or gratings 150,152 may be constructed as a tunable DFB laser. Also, the element 20 may have an inner tapered region 22 or tapered (or fluted) sections 27. The compression may be done by a PZT, stepper motor or other actuator or fluid pressure.
    • 压缩调谐布拉格光栅包括可调谐光学元件20,600,其包括光纤10,其具有印刷在其中的至少一个布拉格光栅12,该光纤10被封装在玻璃毛细管20或大直径波导光栅600的至少一部分中并且熔合到其中, 一个核心和宽广的包层。 光14入射到光栅12上,光16以反射波长lambd1反射。 可调谐元件20,600被轴向压缩,这导致光栅12的反射波长的偏移而不使元件弯曲。 元件的形状可以是其他几何形状(例如,“狗骨”形状)和/或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10或核612。 元件的至少一部分可以掺杂在一对光栅150,152之间,以形成压缩调谐的激光器,或者光栅12或光栅150,152可被构造为可调DFB激光器。 此外,元件20可以具有内锥形区域22或锥形(或凹槽)部分27.压缩可以由PZT,步进电动机或其他致动器或流体压力来实现。