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公开(公告)号：US09874519B2
公开(公告)日：2018-01-23
申请号：US14927699
申请日：2015-10-30
申请人： OFS Fitel, LLC
CPC分类号： G01N21/636 , G01D5/35364 , G01D5/3538 , G01N2021/638 , G02B6/02028 , G02B6/02252 , G02B6/03644
摘要： A distributed Brillouin sensor system comprising a pump laser, a Brillouin sensor fiber, and a detector system is described. The pump laser is arranged so as to send a pump signal into a first end of the Brillouin sensor fiber, and the detector system is arranged to detect Brillouin backscattering from the Brillouin sensor fiber. The Brillouin sensor fiber is characterized by having a negative dispersion, and further by an effective area of the sensor fiber being less than or equal to 50 μm2.
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公开(公告)号：US09964420B2
公开(公告)日：2018-05-08
申请号：US14927734
申请日：2015-10-30
申请人： OFS Fitel, LLC
CPC分类号： G01D5/35364 , G01D5/3538 , G02B6/02019 , G02B6/03627 , H01S3/302
摘要： A distributed Brillouin sensor system comprising a pump laser, and a combined fiber assembly including at least a first optical fiber section and a second optical fiber section is described. The pump laser is arranged so as to send a pump signal into a first end of combined fiber assembly, and the detector system is arranged to detect Brillouin backscattering from the combined fiber assembly. The combined fiber assembly is characterized by the first section having a low Brillouin gain, and the second fiber section having a high Brillouin gain.
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公开(公告)号：US09502852B2
公开(公告)日：2016-11-22
申请号：US14349269
申请日：2012-10-09
申请人： OFS Fitel, LLC
CPC分类号： H01S3/067 , G02B6/03688 , G02B6/14 , H01S3/0057 , H01S3/06716 , H01S3/0675 , H01S3/0804 , H01S2301/085
摘要： Embodiments of the present invention generally relate to fiber designs for wavelength tunable ultra-short pulse lasers. More specifically, embodiments of the present invention relate to systems incorporating fiber designs for higher order mode fibers capable of soliton self frequency shifting where a system comprises a first fiber for shifting the wavelength from a pump wavelength to a transfer wavelength and a second fiber for shifting the pulse from the transfer wavelength to an output wavelength. In one embodiment of the present invention, a wavelength tunable short pulse fiber laser system comprises: a pulse generator for providing a pulse having an input wavelength; a mode-converter; a first designed fiber for shifting the pulse from the input wavelength to a transfer wavelength; and a second designed fiber for shifting the pulse from the transfer wavelength to an output wavelength.
摘要翻译： 本发明的实施例一般涉及用于波长可调超短脉冲激光器的光纤设计。 更具体地，本发明的实施例涉及将光纤设计结合到具有能够进行孤子自移频的高阶模式光纤的系统，其中系统包括用于将波长从泵浦波长移位到传输波长的第一光纤和用于移位的第二光纤 从转移波长到输出波长的脉冲。 在本发明的一个实施例中，波长可调短脉冲光纤激光系统包括：脉冲发生器，用于提供具有输入波长的脉冲; 模式转换器 用于将脉冲从输入波长移位到转移波长的第一设计光纤; 以及用于将脉冲从转移波长移位到输出波长的第二设计光纤。
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4.发明申请公开(公告)号：US20150369985A1
公开(公告)日：2015-12-24
申请号：US14763036
申请日：2014-01-27
申请人： OFS FITEL, LLC , AARHUS UNIVERSITY
CPC分类号： G02B5/32 , G02B6/0015 , G02B6/0035 , G02B6/02314 , G02B6/14 , G02B27/0944 , G02B27/0994 , G03H1/0272 , G03H2270/20 , G03H2270/32
摘要： An optical waveguide comprising an axial direction and a cross-section perpendicular to said axial direction is shown. The optical waveguide comprises a core region. The core region includes an integrally formed hologram, which extends along a first axial segment of the optical waveguide, the first axial segment having a first axial length. The hologram, seen in the cross-section, includes a micro-structure with written elements having a modified refractive index different from areas of the core region with an unmodified refractive index.
摘要翻译： 示出了包括轴向方向和垂直于所述轴向方向的横截面的光波导。 光波导包括芯区域。 芯区域包括沿着光波导的第一轴向段延伸的整体形成的全息图，第一轴向段具有第一轴向长度。 在横截面中看到的全息图包括具有不同于具有未改变折射率的芯区域的区域的修改的折射率的书写元件的微结构。
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公开(公告)号：US09482817B2
公开(公告)日：2016-11-01
申请号：US14362456
申请日：2012-12-06
申请人： OFS Fitel, LLC
CPC分类号： G02B6/14 , G02F1/3536 , G02F1/365 , G02F2201/02 , G02F2201/05
摘要： Embodiments of the present invention generally relate to optical mode conversion by nonlinear effects. More specifically, embodiments of the present invention relate to nonlinear mode conversion utilizing intermodal four-wave mixing to convert light between modes having different wavelengths for complex applications. In one embodiment of the present invention, a fiber comprises an input end for receiving light in a first mode at a first wavelength, and an output end for outputting light in a desired second mode at a desired second wavelength, wherein the first wavelength and the second wavelength are not the same. In many embodiments, the fiber comprises a higher-order mode fiber.
摘要翻译： 本发明的实施例一般涉及通过非线性效应的光学模式转换。 更具体地，本发明的实施例涉及利用联合四波混频以在复杂应用中具有不同波长的模式之间转换光的非线性模式转换。 在本发明的一个实施例中，光纤包括用于以第一波长接收第一模式的光的输入端和用于以期望的第二波长以期望的第二模式输出光的输出端，其中第一波长和 第二波长不一样。 在许多实施例中，光纤包括高阶模式光纤。
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公开(公告)号：US20140139907A1
公开(公告)日：2014-05-22
申请号：US14126058
申请日：2011-12-28
申请人： OFS Fitel, LLC
发明人： Lars Gruner-Nielsen
CPC分类号： G02B6/29377 , G02B6/03644 , H01S3/0057 , H01S3/06725 , H01S3/06766 , H04B10/25133
摘要： Embodiments of the present invention are generally related to embodiments of the present invention relate to a fiber stretchers module for use in the 1550 nm wavelength range. In one embodiment of the present invention, a fiber stretcher module for use in the 1550 nm wavelength range comprises a first fiber comprising a relative dispersion curve value of greater than about 0.0002 nm−2 and a dispersion value of less than about −60 ps/(nm·km) at about 1550 nm, and a second fiber comprising a relative dispersion curve value of about zero and a relative dispersion slope value of about 0.003 nm−1 at about 1550 nm, wherein the fiber stretcher module comprises a collective relative dispersion slope of about 0.0413 nm−1 and a relative dispersion curve of about 0.00286 nm−2 at 1550 nm.
摘要翻译： 本发明的实施例通常涉及用于1550nm波长范围的纤维拉伸模块的本发明的实施例。 在本发明的一个实施例中，用于1550nm波长范围的纤维拉伸模块包括第一纤维，其包含大于约0.0002nm-2的相对色散曲线值和小于约-60ps / （nm·km），以及在约1550nm处包含大约零的相对色散曲线值和约0.003nm-1的相对色散斜率值的第二光纤，其中所述纤维拉伸模块包括集体相对色散 斜率为约0.0413nm-1，相对色散曲线为约0.00286nm-2，在1550nm处。
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公开(公告)号：US20160258788A1
公开(公告)日：2016-09-08
申请号：US14927734
申请日：2015-10-30
申请人： OFS Fitel, LLC
CPC分类号： G01D5/35364 , G01D5/3538 , G02B6/02019 , G02B6/03627 , H01S3/302
摘要： A distributed Brillouin sensor system comprising a pump laser, and a combined fiber assembly including at least a first optical fiber section and a second optical fiber section is described. The pump laser is arranged so as to send a pump signal into a first end of combined fiber assembly, and the detector system is arranged to detect Brillouin backscattering from the combined fiber assembly. The combined fiber assembly is characterized by the first section having a low Brillouin gain, and the second fiber section having a high Brillouin gain.
摘要翻译： 描述了包括泵激光器的分布布里渊传感器系统和至少包括第一光纤部分和第二光纤部分的组合光纤组件。 泵浦激光器被布置成将泵浦信号发送到组合光纤组件的第一端，并且检测器系统被布置成从组合光纤组件检测布里渊后向散射。 组合光纤组件的特征在于具有低布里渊增益的第一部分，并且第二光纤部分具有高布里渊增益。
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8.发明授权Highly nonlinear optical fiber with improved SBS threshold and moderate attenuation 有权高非线性光纤具有改进的SBS阈值和中等衰减公开(公告)号：US09366811B2
公开(公告)日：2016-06-14
申请号：US14381910
申请日：2013-03-04
申请人： OFS Fitel, LLC
CPC分类号： G02B6/028 , G02B6/03627 , G02B2006/12061 , G02F1/365
摘要： A highly nonlinear optical fiber having an improved stimulated Brillouin scattering threshold is provided. The fiber includes a central core region made substantially from silica doped with aluminum, a trench region surrounding the central core region, and a silica cladding surrounding the trench region. The refractive index profile of the fiber is optimized. A refractive index difference of the central core region relative to the cladding (Δn+) is less than 26×10−3, and more preferably at or near 21×10−3. A refractive index difference of the trench region relative to the cladding (Δn−) is less than −5×10−3. The trench region is preferably doped with fluorine. The aluminum doping level of the central core region is preferably less than 14 wt % Al. A fiber doped with aluminum having this refractive index profile exhibits a significantly higher figure of merit (PthγLeff) than conventional germanium-doped fibers.
摘要翻译： 提供了具有改进的受激布里渊散射阈值的高度非线性的光纤。 纤维包括基本上由掺杂有铝的二氧化硅制成的中心芯区域，围绕中心芯区域的沟槽区域和围绕沟槽区域的二氧化硅覆层。 纤维的折射率分布优化。 中心纤芯区域相对于包层（＆Dgr; n +）的折射率差小于26×10 -3，更优选为21×10 -3或接近21×10 -3。 沟槽区域相对于包层（＆Dgr; n-）的折射率差小于-5×10 -3。 沟槽区优选掺杂氟。 中心芯区域的铝掺杂水平优选小于14重量％的Al。 掺有铝的具有该折射率分布的光纤比常规锗掺杂光纤显示更高的品质因数（PthγLeff）。
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公开(公告)号：US20150177462A1
公开(公告)日：2015-06-25
申请号：US14627390
申请日：2015-02-20
申请人： OFS Fitel, LLC
发明人： Lars Gruner-Nielsen
CPC分类号： G02B6/29377 , G02B6/03644 , H01S3/0057 , H01S3/06725 , H01S3/06766 , H04B10/25133
摘要： Embodiments of the present invention are generally related to embodiments of the present invention relate to a fiber stretchers module for use in the 1550 nm wavelength range. In one embodiment of the present invention, a fiber stretcher module for use in the 1550 nm wavelength range comprises a fiber having a relative dispersion slope, RDS, and a relative dispersion curvature, RDC, wherein a ratio of said slope to said curvature is between about 30 nm and about 0 nm, having a dispersion value of less than about −10 ps/(nm·km) at about 1550 nm, and a RDS is equal to or greater than 0.
摘要翻译： 本发明的实施例通常涉及用于1550nm波长范围的纤维拉伸模块的本发明的实施例。 在本发明的一个实施例中，用于1550nm波长范围的纤维拉伸模块包括具有相对色散斜率RDS和相对色散曲率RDC的光纤，其中所述斜率与所述曲率的比率在 约30nm和约0nm，在约1550nm具有小于约-10ps /（nm·km）的色散值，RDS等于或大于0。
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公开(公告)号：US20150168643A1
公开(公告)日：2015-06-18
申请号：US14575821
申请日：2014-12-18
申请人： OFS Fitel, LLC
IPC分类号： G02B6/028
CPC分类号： G02B6/0288 , G02B6/268
摘要： A few-mode fiber is described, having a graded-index core and a surrounding cladding comprising a ledge between the core and the trench, a down-doped trench abutting the ledge, and an undoped cladding region abutting the trench. The fiber's refractive index profile is configured to support 9 or more LP modes for transmission of a spatially-multiplexed optical signal. Undesired modes have respective effective indices that are close to, or less than, the cladding index so as to result in leakage of the undesired modes into the outer cladding. The index spacing between the desired mode having the lowest effective index and the leaky mode with the highest effective index is sufficiently large so as to substantially prevent coupling therebetween.
摘要翻译： 描述了具有渐变折射率芯和包围在芯和沟槽之间的凸缘的周围包层，邻接凸缘的下掺杂沟槽和邻接沟槽的未掺杂包层区域的多模光纤。 光纤的折射率分布被配置为支持9个或更多个LP模式以传输空间复用光信号。 不期望的模式具有接近或小于包层指数的相应有效指数，以便导致不期望的模式向外包层的泄漏。 具有最低有效指数的期望模式与具有最高有效指数的泄漏模式之间的指数间隔足够大，以便基本上防止它们之间的耦合。
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