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公开(公告)号：US4761073A
公开(公告)日：1988-08-02
申请号：US915891
申请日：1986-10-03
申请人： Gerald Meltz , William H. Glenn , Elias Snitzer
发明人： Gerald Meltz , William H. Glenn , Elias Snitzer
CPC分类号： G01L1/242 , G01B11/16 , G01D5/35383 , G01K5/52
摘要： A distributed, spatially resolving optical fiber strain gauge in which the core of the optical fiber is written with periodic grating patterns effective for transmitting and reflecting light injected into the core. Spectral shifts in the transmitted and reflected light indicate the intensity of strain or temperature variations at positions of the grating corresponding to the associated wavelengths of injected light.
摘要翻译： 分布式，空间分辨的光纤应变计，其中光纤的芯被写入有效地用于透射和反射注入到芯中的光的周期性光栅图案。 透射光和反射光中的光谱偏移表示对应于注入光的相关波长的光栅位置处的应变强度或温度变化。
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公开(公告)号：US4806012A
公开(公告)日：1989-02-21
申请号：US122826
申请日：1987-11-19
申请人： Gerald Meltz , William H. Glenn , Elias Snitzer
发明人： Gerald Meltz , William H. Glenn , Elias Snitzer
CPC分类号： G01K5/52 , G01B11/16 , G01D5/35383
摘要： A distributed, spatially resolving optical fiber strain gauge in which the core of the optical fiber is written with periodic grating patterns effective for transmitting and reflecting light injected into the core. Spectral shifts in the transmitted and reflected light indicate the intensity of strain or temperature variations at positions of the grating corresponding to the associated wavelengths of injected light.
摘要翻译： 分布式，空间分辨的光纤应变计，其中光纤的芯被写入有效地用于透射和反射注入到芯中的光的周期性光栅图案。 透射光和反射光中的光谱偏移表示对应于注入光的相关波长的光栅位置处的应变强度或温度变化。
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公开(公告)号：US4725110A
公开(公告)日：1988-02-16
申请号：US925512
申请日：1986-10-27
申请人： William H. Glenn , Gerald Meltz , Elias Snitzer
发明人： William H. Glenn , Gerald Meltz , Elias Snitzer
IPC分类号： G01J1/02 , G01K11/12 , G01L1/00 , G02B5/18 , G02B6/00 , G02B6/02 , G02B6/124 , G02B6/34 , G02B6/12
CPC分类号： G02B5/18 , G02B6/02133 , G02B6/022 , G02B6/02204 , G02B6/124 , Y10S359/90
摘要： A method of establishing a dielectric periodic index of refraction phase grating upon the core of an optical waveguide by intense angled application of several transverse beams of ultraviolet light, enabling the establishment of a distributed, spatially resolving optical fiber strain gauge.
摘要翻译： 通过强烈地角度地施加几束紫外线横向光束，在光波导的核心上建立折射相位光栅的介电周期性折射率的方法，使得能够建立分布式空间分辨的光纤应变计。
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公开(公告)号：US4300816A
公开(公告)日：1981-11-17
申请号：US71513
申请日：1979-08-30
申请人： Elias Snitzer , Gerald Meltz
发明人： Elias Snitzer , Gerald Meltz
IPC分类号： G02B6/44 , H04B10/2581 , G02B5/14
CPC分类号： H04B10/2581 , G02B6/02042 , G02B6/441
摘要： An optical waveguide having a plurality of cores disposed in a common cladding provides an optical fiber with both a wide bandwidth, by minimizing modal dispersion, and a large aperture to enhance light-carrying capacity. Each of the cores is sized to support only the lowest order mode, HE.sub.11, and the intercore spacing is selected to achieve a required bandwidth. At the same time, the multiple cores provide a large aperture allowing a relatively large amount of light energy emitted from a noncoherent light source to be coupled into the optical fiber. An array factor A.sub.f is given which provides design criteria for the intercore spacing by providing an accurate calculation of the pulse spreading with a large number of cores beginning with a simple twin core fiber.
摘要翻译： 具有设置在公共包层中的多个芯的光波导通过最小化模态色散而提供具有宽带宽的光纤，并且提供大的光圈以增强光承载能力。 每个核心的大小仅支持最低阶模式HE11，并且选择间隔间距以实现所需的带宽。 同时，多个芯提供大的孔径，允许从非相干光源发射的相对大量的光能耦合到光纤中。 给出阵列因子Af，其通过以简单的双芯光纤开始的大量核提供脉冲扩展的精确计算，为串间间距提供设计准则。
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公开(公告)号：US4298794A
公开(公告)日：1981-11-03
申请号：US162285
申请日：1980-06-23
申请人： Elias Snitzer , Gerald Meltz
发明人： Elias Snitzer , Gerald Meltz
CPC分类号： H04B10/85 , G01K11/32 , G02B6/4439
摘要： A hot spot detector for a power cable, or the like, includes an optical fiber having a plurality of cores including an input core into which light energy is coupled. The core diameters, spacing, and materials of the cores and the cladding are carefully selected so that cross-talk from the input core to the secondary cores occurs only in the vicinity of the point along the fiber where the hot spot is located. Light energy then propagates along the secondary cores and modal interference causes a beat phenomena producing spatial interference that can be analyzed as energy flow between the secondary cores. By measuring the light intensity patterns emerging from the secondary cores at at least two distinct wavelengths, the location of the hot spot along the fiber can be calculated.
摘要翻译： 用于电力电缆等的热点检测器包括具有多个芯的光纤，所述多个芯包括耦合有光能的输入芯。 仔细选择芯和包层的芯直径，间距和材料，使得从输入芯到次芯的串扰仅发生在沿着热点所在的光纤的点附近。 然后，光能沿着二次核传播，并且模态干扰导致产生空间干扰的节拍现象，其可以被分析为次级核之间的能量流。 通过在至少两个不同波长处测量从次级芯出现的光强度图案，可以计算热点沿着光纤的位置。
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公开(公告)号：US4807950A
公开(公告)日：1989-02-28
申请号：US122830
申请日：1987-11-19
申请人： William H. Glenn , Gerald Meltz , Elias Snitzer
发明人： William H. Glenn , Gerald Meltz , Elias Snitzer
IPC分类号： G01J1/02 , G01K11/12 , G01L1/00 , G02B5/18 , G02B6/00 , G02B6/02 , G02B6/124 , G02B6/34 , G02F1/01
CPC分类号： G02B5/18 , G02B6/02133 , G02B6/022 , G02B6/02204 , G02B6/124 , Y10S359/90
摘要： An optical fiber has a dielectric periodic index of refraction phase grating established in its core by intense angled application of several transverse beams of ultraviolet light, enabling the establishment of a distributed, spatially resolving optical fiber strain gauge.
摘要翻译： 光纤通过强烈的角度施加几个紫外线的横梁，具有建立在其芯中的折射相位光栅的介电周期性折射率，使得能够建立分布式空间分辨的光纤应变计。
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公开(公告)号：US4653906A
公开(公告)日：1987-03-31
申请号：US640491
申请日：1984-08-13
申请人： James R. Dunphy , Gerald Meltz , Elias Snitzer
发明人： James R. Dunphy , Gerald Meltz , Elias Snitzer
CPC分类号： G01L1/243
摘要： An optical strain measuring arrangement including an optical waveguide comprising first and second cores fixedly mounted with respect to a mechanical structure to be monitored, and a detection system for relating the contrast in light intensity emerging from said cores to a range of wavelengths to establish an indication of strain along the range of the optical waveguide.
摘要翻译： 一种光学应变测量装置，包括光波导，该光波导包括相对于待监视的机械结构固定地安装的第一和第二芯，以及用于将从所述芯出现的光强度中的对比度与波长范围相关联的检测系统，以建立指示 的应变沿着光波导的范围。
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公开(公告)号：US4295739A
公开(公告)日：1981-10-20
申请号：US162284
申请日：1980-06-23
申请人： Gerald Meltz , Elias Snitzer
发明人： Gerald Meltz , Elias Snitzer
CPC分类号： G01K11/32 , G01B11/18 , G01L1/243 , G01L11/025
摘要： A multicore optical fiber having a plurality of cores positioned across the diameter of a common cladding can be so optimized to respond to either temperature or strain by the selection of materials, spacing and shape of the cores in the fiber. The cross-talk between adjacent cores in the fiber changes in response to either a change in temperature or a strain along the length of the fiber. The temperature, strain or pressure change, can be determined by measuring the relative intensity of light emerging from the different cores of the fiber. If the fiber is optimized to respond to temperature change, then a high degree of temperature sensitivity can be provided over a large unambiguous range. Alternatively, cross-talk can be made temperature insensitive so that the intensity pattern of light emerging from the various cores in the fiber is only a function of the strain exerted on the fiber.
摘要翻译： 具有跨越公共包层的直径定位的多个芯的多芯光纤可以如此优化，以通过材料的选择，纤维中的芯的间隔和形状来响应温度或应变。 纤维中的相邻芯之间的串扰响应于温度的变化或沿着纤维的长度的应变而变化。 温度，应变或压力变化可以通过测量从纤维的不同纤芯出射的光的相对强度来确定。 如果光纤被优化以响应温度变化，则可以在很大的明确范围内提供高度的温度灵敏度。 或者，串扰可以使得温度不敏感，使得从纤维中的各种芯出现的光的强度图案仅仅是施加在纤维上的应变的函数。
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公开(公告)号：US4295738A
公开(公告)日：1981-10-20
申请号：US162283
申请日：1980-06-23
申请人： Gerald Meltz , Elias Snitzer
发明人： Gerald Meltz , Elias Snitzer
CPC分类号： G01L1/243 , G01B11/18 , G01L11/025
摘要： An optical fiber having at least two cores positioned in a common cladding can be fabricated to be responsive to strain or hydrostatic pressure but not to temperature through the selection of materials, spacing and shape of the cores and cladding in the fiber. Accordingly, the cross-talk between adjacent cores in the optical waveguide can be optimized to respond to a change in hydrostatic pressure or in unidirectional strain along the length of the fiber. The strain or pressure change, can be determined by measuring the relative intensity of light emerging from the different cores of the fiber. A larger unambiguous range for strain or hydrostatic pressure changes can be provided by a multi-core optical fiber embodiment.
摘要翻译： 可以制造具有位于共同包层中的至少两个芯的光纤，以响应于应变或静水压力，而不是通过材料的选择，纤芯中的芯和包层的间隔和形状来选择温度。 因此，可以优化光波导中相邻芯之间的串扰，以响应静水压力的变化或沿着光纤长度的单向应变。 应变或压力变化可以通过测量从纤维的不同纤芯出射的光的相对强度来确定。 应变或静水压力变化的更大的明确范围可以由多芯光纤实施例提供。
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公开(公告)号：US06373863B1
公开(公告)日：2002-04-16
申请号：US08878911
申请日：1997-06-19
申请人： Yasutake Ohishi , Elias Snitzer
发明人： Yasutake Ohishi , Elias Snitzer
IPC分类号： H01S330
CPC分类号： H01S3/06708 , H01S3/06729 , H01S3/06754 , H01S3/094003 , H01S3/1613 , H01S3/173
摘要： An apparatus, composition, and method for producing an optical gain. The apparatus includes: an optical fiber having a core and a multiple cladding, the core being doped with Yb3+; a light source producing light at a wavelength in a range of from about 0.8 to about 1.06 microns to energize the yb3+ to produce laser action; and wherein the core is essentially devoid of Nd3+.
摘要翻译： 一种用于产生光学增益的装置，组成和方法。 该装置包括：具有芯和多个包层的光纤，该芯被Yb3 +掺杂; 产生波长在约0.8至约1.06微米范围内的光的光源，以激励yb3 +以产生激光作用; 并且其中所述芯基本上不含有Nd 3+。
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