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公开(公告)号：US07386204B1
公开(公告)日：2008-06-10
申请号：US09648525
申请日：2000-08-26
IPC分类号： G02B6/34
CPC分类号： G02B6/4215 , G02B6/022 , G02B6/2932 , G02B6/29322 , G02B6/29395 , H04J14/02
摘要： An optical filter, including a pair of Bragg grating units optically coupled to respective ports of a circulator, is provided for filtering a selected wavelength band of light from a DWDM input light. Each grating unit includes a respective tunable optical element, which have a reflective element, such as a Bragg grating. Generally, one grating unit filters a selected wavelength band of light and reflects the selected wavelength band to the other grating unit, which reflects a portion of the reflected wavelength band to an output of the optical filter. This double reflection of the selected wavelength band provides an optical filter having an effective filter function that is equal to the product of the individual filter functions of the grating units. To create a desired effective filter function, the gratings may be written to have different filter functions or grating profiles. One or both of the grating units may also be tunable to selectively create, tailor, shape or change the effective filter function of the optical filter in response to a control signal by offsetting the reflection wavelengths of the gratings, having different grating profiles.
摘要翻译： 提供了一种光学滤波器，其包括光耦合到环行器的相应端口的一对布拉格光栅单元，用于对来自DWDM输入光的所选择的波长带进行滤波。 每个光栅单元包括各自的可调光学元件，其具有诸如布拉格光栅的反射元件。 通常，一个光栅单元对所选择的波长带进行滤光并将所选择的波长带反射到将反射波长带的一部分反射到滤光器的输出的另一光栅单元。 所选波长带的这种双重反射提供了具有等于光栅单元的各个滤波器功能的乘积的有效滤波器功能的滤光器。 为了创建期望的有效滤波器功能，可以将光栅写入以具有不同的滤波器功能或光栅轮廓。 光栅单元中的一个或两个也可以是可调谐的，以通过偏移具有不同光栅轮廓的光栅的反射波长来响应于控制信号选择性地创建，调整，形状或改变滤光器的有效滤光器功能。
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公开(公告)号：US06826343B2
公开(公告)日：2004-11-30
申请号：US10098925
申请日：2002-03-16
IPC分类号： G02B622
CPC分类号： G02B6/4215 , G02B6/02042 , G02B6/02057 , G02B6/022 , G02B6/266 , G02B6/2861 , G02B6/29319 , G02B6/2932 , G02B6/29322 , G02B6/29334 , G02B6/29352 , G02B6/29353 , G02B6/29383 , G02B6/29395 , G02B6/29398 , G02F1/0115 , G02F2201/307 , G02F2203/60
摘要： An optical device is provided that includes an optical waveguide and a tuning device. The optical waveguide has an outer transverse dimension greater than about 0.3 millimeter (mm), and includes an outer cladding, and at least two cores disposed within the outer cladding, the at least two cores being spaced apart a predetermined distance to couple light from a first core to the other core. The tuning device provides a compressive force on the optical waveguide to couple one or more optical signals from one core to another core.
摘要翻译： 提供了一种包括光波导和调谐装置的光学装置。 所述光波导具有大于约0.3毫米（mm）的外横向尺寸，并且包括外包层，以及设置在所述外包层内的至少两个芯，所述至少两个芯间隔开预定距离以耦合来自 第一核心到另一个核心。 调谐装置在光波导上提供压缩力以将一个或多个光信号从一个核耦合到另一个核。
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公开(公告)号：US06785004B2
公开(公告)日：2004-08-31
申请号：US09726059
申请日：2000-11-29
IPC分类号： G01B902
CPC分类号： G01D5/35383 , E21B47/102
摘要： An apparatus and method for interrogating fiber optic sensors non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes a two-beam interferometer which comprises an optical circuit for generating a series of discrete light pulses that are directed at sensors positioned between pairs of low reflectivity fiber Bragg gratings. The successive light pulses are split into first light pulses and second light pulses, and the second light pulses are delayed a known time period relative to the first pulses. The first and second light pulses are combined onto a single optical fiber and directed through the low reflectivity gratings and the sensors positioned between the gratings. Reflected pulses from the series of pulses impinge on a photo receiver and interrogator, wherein the phase shift between the reflected first light pulses from a particular grating and the reflected second light pulses from the preceding grating, for each sensor are determined. Phase shifts from successive pulses for each sensor are compared, and a change in a measured parameter of the fluid is determined.
摘要翻译： 提供了一种用于询问光纤传感器非侵入式地感测管道内的流体流动的装置和方法。 该装置包括双光束干涉仪，其包括用于产生一系列离散光脉冲的光学电路，其被定向在位于低反射率光纤布拉格光栅对之间的传感器处。 连续的光脉冲被分成第一光脉冲和第二光脉冲，并且第二光脉冲相对于第一脉冲被延迟已知的时间周期。 第一和第二光脉冲被组合到单个光纤上并被引导通过位于光栅之间的低反射率光栅和传感器。 来自一系列脉冲的反射脉冲撞击光接收器和询问器，其中确定来自特定光栅的反射的第一光脉冲与来自前一光栅的反射的第二光脉冲之间对于每个传感器的相移。 比较每个传感器的连续脉冲的相移，并确定流体的测量参数的变化。
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公开(公告)号：US06763043B2
公开(公告)日：2004-07-13
申请号：US10224157
申请日：2002-08-20
IPC分类号： H01S330
CPC分类号： G02B6/02204 , G02B6/02 , G02B6/02042 , G02B6/02085 , G02B6/02176 , G02B6/0218 , G02B6/022 , G02B6/29317 , G02B6/2932 , G02B6/29322 , G02B6/29394 , G02B6/29395 , G02B6/29398 , G02F1/0115 , G02F1/0128 , G02F2201/307 , H01S3/0057
摘要： A tunable dispersion compensating device includes a grating element in the form of a bulk or large diameter waveguide, having an outer cladding disposed about an inner core. The grating element may be etched, grounded or machined to form a generally “dog bone” shape, wherein the end portions of the grating element has a larger diameter than the center portion disposed therebetween. A chirped grating is written or impressed within the portion of the core disposed in the center portion of the grating element. The center portion is tapered to allow different stresses to be applied along the grating length when the grating element is compressed longitudinally by force F, and thereby vary chirp of the grating to tunably compensate for dispersion.
摘要翻译： 可调谐色散补偿装置包括呈大体积或大直径波导形式的光栅元件，其具有围绕内核设置的外包层。 光栅元件可以被蚀刻，接地或机加工以形成大致“狗骨”形状，其中光栅元件的端部具有比设置在其间的中心部分更大的直径。 啁啾光栅被写入或印在设置在光栅元件的中心部分的芯部分内。 中心部分是锥形的，以允许当光栅元件被力F纵向压缩时沿着光栅长度施加不同的应力，从而改变光栅的啁啾线以可调谐地补偿色散。
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公开(公告)号：US06278811B1
公开(公告)日：2001-08-21
申请号：US09399504
申请日：1999-09-20
申请人： Arthur D. Hay , Alan D. Kersey , Robert J. Maron , Phillip Edmund Pruett , Mark R. Fernald , Guy A. Daigle , F. Kevin Didden , Allen R. Davis , Michael A. Davis , Timothy J. Bailey
发明人： Arthur D. Hay , Alan D. Kersey , Robert J. Maron , Phillip Edmund Pruett , Mark R. Fernald , Guy A. Daigle , F. Kevin Didden , Allen R. Davis , Michael A. Davis , Timothy J. Bailey
IPC分类号： G02B600
CPC分类号： G01L11/025
摘要： A fiber optic Bragg grating pressure sensor particularly suited for measuring ambient pressure of a fluid includes a pressuring detecting device 12 such as a glass element whose elastic deformation is proportional to applied pressure. An optical fiber 28 with an integral first grating 33 is wrapped at least once around the device and has at least a portion of its length fused to the device 12 such that elastic deformation of the device 12 generates a corresponding axial strain in the fiber 28 and/or the grating 33 and thus a corresponding change of the fiber length and/or characteristic reflectance wavelength of the grating 33. A second grating 35 may be formed near the pressure detecting device 12 so as to sense ambient temperature but not be affected by deformation of the device 12 for temperature compensation. Also, the fiber 28 may have more than one grating or be doped at least between a pair of gratings 160,162, to form a fiber laser or a DFB fiber laser which lasing wavelength changes with changing pressure.
摘要翻译： 特别适用于测量流体环境压力的光纤布拉格光栅压力传感器包括加压检测装置12，例如玻璃元件，其弹性变形与施加的压力成比例。 具有集成的第一光栅33的光纤28至少缠绕在设备周围，并且其长度的至少一部分与设备12融合，使得设备12的弹性变形在纤维28中产生相应的轴向应变，并且 /或光栅33，从而光栅33的光纤长度和/或特征反射波长的相应变化。第二光栅35可以形成在压力检测装置12附近，以便感测环境温度但不受变形影响 的温度补偿装置12。 此外，光纤28可以具有多于一个光栅或者至少在一对光栅160,162之间被掺杂，以形成激光波长随着变化的压力而变化的光纤激光器或DFB光纤激光器。
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公开(公告)号：US06229827B1
公开(公告)日：2001-05-08
申请号：US09456112
申请日：1999-12-06
申请人： Mark R. Fernald , Timothy J. Bailey , Matthew B. Miller , James M. Sullivan , Michael A. Davis , Robert N. Brucato , Martin A. Putnam , Alan D. Kersey , Paul E. Sanders
发明人： Mark R. Fernald , Timothy J. Bailey , Matthew B. Miller , James M. Sullivan , Michael A. Davis , Robert N. Brucato , Martin A. Putnam , Alan D. Kersey , Paul E. Sanders
IPC分类号： H01S310
CPC分类号： G02F1/0115 , G02B6/0218 , G02B6/022 , G02F1/0128 , G02F2201/307
摘要： 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 20 or 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 orgratings 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.
摘要翻译： 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，该布拉格光栅12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 具有核心和广泛的包层。 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或格栅化器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。
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公开(公告)号：US4946553A
公开(公告)日：1990-08-07
申请号：US241739
申请日：1988-09-08
CPC分类号： G02B6/4202 , G02B6/4225 , Y10T156/17
摘要： An optical light source is interfaced to an optical fiber by mounting the optical light source on a source carrier, mounting the optical fiber on a fiber carrier, aligning the optical fiber with the optical light source and bonding the source carrier to the fiber carrier thereby securing the alignment of the optical fiber and the optical light source. The fiber carrier can be made to have the same or substantially the same thermal expansion characteristics of those of said source carrier. A lens may be interposed between the light source and the fiber, typically by forming a convex surface on the tip of the fiber. The apparatus so made thus comprises an optical fiber carrier, an optical fiber attached to the fiber carrier, a source carrier and an optical light source mounted on the source carrier aligned with the optical fiber. A lens may be provided between the source and the fiber, typically formed on the tip of the fiber. For both method and apparatus, separate source and fiber carriers may be dispensed with and a single carrier used for both source and fiber.
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68.发明授权
公开(公告)号：US4867524A
公开(公告)日：1989-09-19
申请号：US241738
申请日：1988-09-08
CPC分类号： G02B6/30 , G02B6/3636 , G02B6/4202 , G02B6/4237 , G02B6/3652 , G02B6/3692 , G02B6/4225
摘要： A method for pigtailing an optical fiber to a lithium niobate integrated optical device (I/O chip) is shown and described wherein the bonding between the I/O chip and the optical fiber is a metallic bond. The lithium niobate may be attached to a metallic substrate which is welded to a metallic fiber optic carrier which is in turn welded to a metallized optical fiber. The fiber optic carrier may also be made of non-metallic materials which are given a metallic coating prior to attachment to the I/O chip by means of a metallic bond such as welding.
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