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1.发明授权Suppression of stimulated Brillouin scattering (SBS) in high power fiber amplifiers 有权在大功率光纤放大器中抑制受激布里渊散射（SBS）公开(公告)号：US07733561B2
公开(公告)日：2010-06-08
申请号：US11169998
申请日：2005-06-28
申请人： Marc Mermelstein , Andrew D. Yablon
发明人： Marc Mermelstein , Andrew D. Yablon
CPC分类号： H01S3/06758 , H01S3/07 , H01S3/09415 , H01S2301/02 , H01S2301/03
摘要： A fiber amplifier suitable for high power, narrow linewidth applications exhibits suppression of stimulated Brillouin scattering (SBS) by segmenting the fiber amplifier into separate portions that exhibit different Brillouin center frequencies. By changing the center frequencies in adjoining segments of the fiber amplifier, the backward-propagating Stokes signal is essentially blocked, and SBS is suppressed. In a preferred embodiment the segmentation is added to the terminating portion of the fiber amplifier. Various techniques, including temperature modifications, can be used to impart the desired center frequency shift.
摘要翻译： 适用于高功率，窄线宽应用的光纤放大器通过将光纤放大器分割成具有不同布里渊中心频率的分离部分来抑制受激布里渊散射（SBS）。 通过改变光纤放大器相邻段的中心频率，反向传播的斯托克斯信号基本上被阻塞，并且抑制了SBS。 在优选实施例中，分割被添加到光纤放大器的终止部分。 可以使用包括温度改变在内的各种技术来赋予期望的中心频率偏移。
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公开(公告)号：US08860934B2
公开(公告)日：2014-10-14
申请号：US13350626
申请日：2012-01-13
申请人： Andrew D. Yablon
发明人： Andrew D. Yablon
IPC分类号： G01N21/00
摘要： Subject matter disclosed herein relates to measuring optical fibers, and, in particular, to measuring spontaneous emission produced in an optical fiber.
摘要翻译： 本文公开的主题涉及测量光纤，特别是测量在光纤中产生的自发辐射。
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3.发明申请All-fiber module for femtosecond pulse compression and supercontinuum generation 有权全光纤模块用于飞秒脉冲压缩和超连续谱生成公开(公告)号：US20090274180A1
公开(公告)日：2009-11-05
申请号：US12150692
申请日：2008-04-30
CPC分类号： H01S3/0057 , G02B6/02019 , G02B6/02266 , G02B6/32 , H01S3/06725 , H01S3/1635
摘要： An all-fiber optical pulse compression arrangement comprises a concatenated arrangement of a section of input fiber (e.g., a single mode fiber), a graded-index (GRIN) fiber lens and a section of pulse-compressing fiber (e.g., LMA fiber). The GRIN fiber lens is used to provide mode matching between the input fiber (supporting the propagation of chirped optical pulses) and the pulse-compressing fiber, with efficient pulse compression occurring along the length of the LMA fiber. The dispersion and length of the LMA fiber section are selected to provide the desired degree of pulse compression; for example, capable of reconstituting a femtosecond pulse as is used in supercontinuum generation systems.
摘要翻译： 全光纤脉冲压缩装置包括输入光纤（例如，单模光纤），渐变折射率（GRIN）光纤透镜和脉冲压缩光纤部分（例如，LMA光纤）的级联布置， 。 GRIN光纤镜头用于提供输入光纤（支持啁啾光脉冲的传播）和脉冲压缩光纤之间的模式匹配，并且沿着LMA光纤的长度发生有效的脉冲压缩。 选择LMA纤维部分的分散和长度以提供期望的脉冲压缩程度; 例如，能够重构如在超连续谱生成系统中使用的飞秒脉冲。
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公开(公告)号：US07013678B2
公开(公告)日：2006-03-21
申请号：US10247101
申请日：2002-09-19
IPC分类号： C03B37/018
CPC分类号： G02B6/0281 , C03B37/01228 , C03B2201/31 , C03B2203/14 , C03B2203/26 , C03B2203/42 , G02B6/32
摘要： A GRIN fiber lens is fabricated by the steps of providing a graded index glass preform, thinning the graded index preform to remove a sufficient thickness of the graded glass to establish a desired Δn, and drawing a graded index optical fiber from the thinned graded index preform. Thinning, in this context, refers to removal of graded index glass from the outside of the graded index preform so as to reduce its outer diameter. The thinning thus changes Δn which is the refractive index difference between the center of the preform and its outer surface. The graded index preform can be provided by MCVD deposition followed by removal of the starting tube glass, by OVD deposition, by VAD, or by ion exchange fabrication. The thinned graded index preform is advantageously annealed before drawing in order to minimize ripple. And, in a variation of the process, an overcladding can be applied over the thinned graded preform before draw for further adjustment or control of the Δn.
摘要翻译： 通过以下步骤制造GRIN纤维透镜：提供渐变折射率玻璃预成型件，使渐变折射率预成型件变薄以去除足够厚度的渐变玻璃以建立所需的Deltan，并从减薄的渐变折射率预成型件 。 在本文中，变薄是指从分级折射率预成型件的外部去除渐变的折射率玻璃，从而减小其外径。 变薄因此改变Deltan，Deltan是预成型件的中心与其外表面之间的折射率差。 分级折射率预成型件可以通过MCVD沉积提供，然后通过OVD沉积，VAD或通过离子交换制造去除起始管玻璃。 减薄的渐变折射率预成型件在拉伸之前有利地被退火，以使纹波最小化。 而且，在该过程的变化中，可以在拉伸之前在薄化的梯度预成型件上施加外包以进一步调节或控制Deltan。
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公开(公告)号：US20120105831A1
公开(公告)日：2012-05-03
申请号：US13343224
申请日：2012-01-04
IPC分类号： G01N21/00
CPC分类号： G01N21/412 , G01M11/331 , G01M11/335
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber. Measurements of the phase front exiting the optical fiber under test are advantageously performed in the far field.
摘要翻译： 可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。 通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。 有利的是在远场进行离开待测光纤的相位前沿的测量。
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公开(公告)号：US20100008664A1
公开(公告)日：2010-01-14
申请号：US12525332
申请日：2008-02-05
IPC分类号： H04B17/00
CPC分类号： H01S3/06733 , G02B6/02019 , G02B6/02023 , G02B6/02095 , G02B6/02366 , G02B6/03633 , G02B6/14 , G02B6/4296 , H01S3/0672 , H01S3/06741 , H01S3/06754 , H01S3/0804 , H01S3/094003 , H01S3/094038 , H01S3/094096 , H01S2301/03 , H01S2301/20
摘要： When transmitting in higher-order modes (HOMs), the chances of dielectric breakdown in the bulk glass can be reduced by judicious selection of the mode of transmission. Since energy distributions in the HOM profile change with the mode order, one can calculate the peak intensity for any given HOM. Correspondingly, one can calculate whether any portion of the transmitted pulse will exceed the breakdown threshold for the optical fiber through which the HOM signal is being transmitted. Should the calculated energy exceed the dielectric breakdown threshold, another HOM with a lower peak intensity can be selected for signal transmission. Disclosed are systems and methods for selecting an appropriate HOM to reduce the likelihood of dielectric breakdown.
摘要翻译： 当以高阶模式（HOM）传输时，通过明智地选择传输模式可以减小散装玻璃中介质击穿的可能性。 由于HOM曲线中的能量分布以模式顺序改变，所以可以计算任何给定HOM的峰值强度。 相应地，可以计算发射脉冲的任何部分是否将超过发送HOM信号的光纤的击穿阈值。 如果计算能量超过介质击穿阈值，则可以选择具有较低峰值强度的另一个HOM进行信号传输。 公开了用于选择合适的HOM以减少电介质击穿可能性的系统和方法。
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公开(公告)号：US20090262337A1
公开(公告)日：2009-10-22
申请号：US12454089
申请日：2009-05-12
IPC分类号： G01N21/00
CPC分类号： G01N21/412 , G01M11/331 , G01M11/335
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber. Measurements of the phase front exiting the optical fiber under test are advantageously performed in the far field.
摘要翻译： 可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。 通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。 有利的是在远场进行离开待测光纤的相位前沿的测量。
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8.发明授权Characterization of optical fiber using Fourier domain optical coherence tomography 有权使用傅里叶域光学相干断层扫描的光纤的表征公开(公告)号：US07271916B2
公开(公告)日：2007-09-18
申请号：US10784763
申请日：2004-02-23
申请人： Jayesh Jasapara , Andrew D. Yablon
发明人： Jayesh Jasapara , Andrew D. Yablon
IPC分类号： G01B9/02
CPC分类号： C03B37/01807 , C03B37/0253 , C03B2207/70 , G01B9/02044 , G01B9/02091 , G01B11/105 , G01B11/12 , G01B2290/70 , G01M11/3172
摘要： A fiber characterization arrangement utilizes Fourier domain optical coherence tomography (FDOCT) to measure the cross-section of optical fibers, thus providing information sub-surface features, coating thickness/concentricity and stress-induced birefringence under tension. The FDOCT technique can also be used to study microstructured fibers. By making FDOCT measurements on a fiber placed in a cavity, the geometric and optical thickness of the fiber can be simultaneously measured, allowing for the determination of the refractive index of the fiber.
摘要翻译： 纤维表征装置利用傅里叶域光学相干断层扫描（FDOCT）来测量光纤的横截面，从而提供信息子表面特征，涂层厚度/同心度和张力下的应力诱导双折射。 FDOCT技术也可用于研究微结构纤维。 通过在放置在空腔中的纤维上进行FDOCT测量，可以同时测量纤维的几何和光学厚度，从而确定纤维的折射率。
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公开(公告)号：US06970624B2
公开(公告)日：2005-11-29
申请号：US10461133
申请日：2003-06-13
CPC分类号： H01S3/06754 , H01S3/06745 , H01S3/094003 , H01S3/094007 , H01S3/094019 , H01S3/094053
摘要： The specification describes optical fiber gain devices, such as lasers and amplifiers, wherein losses due to a large step transition between an input section and a gain section are reduced by inserting an adiabatic transformer between the input section and the gain section. In the preferred case the adiabatic transformer comprises a GRadient INdex (GRIN) lens. The lens serves as an adiabatic beam expander (reducer) to controllably increase (reduce) the modefield of the beam as it travels through the step transition.
摘要翻译： 本说明书描述了诸如激光器和放大器之类的光纤增益器件，其中通过在输入部分和增益部分之间插入绝热变压器来减小由于输入部分和增益部分之间的大的阶跃转换引起的损耗。 在优选情况下，绝热变压器包括GRadient INdex（GRIN）透镜。 该透镜用作绝热的光束扩展器（减速器），以在光束行进通过阶跃转变时可控地增加（减小）光束的模场。
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公开(公告)号：US08111386B2
公开(公告)日：2012-02-07
申请号：US12454089
申请日：2009-05-12
IPC分类号： G01N21/00
CPC分类号： G01N21/412 , G01M11/331 , G01M11/335
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber. Measurements of the phase front exiting the optical fiber under test are advantageously performed in the far field.
摘要翻译： 可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。 通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。 有利的是在远场进行离开待测光纤的相位前沿的测量。
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