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公开(公告)号：US20090231682A1
公开(公告)日：2009-09-17
申请号：US12355951
申请日：2009-01-19
申请人： Raman Kashyap , Galina Nemova
发明人： Raman Kashyap , Galina Nemova
IPC分类号： H01S3/00
CPC分类号： H01S3/06754 , G01M11/319 , G02B6/02095 , H01S3/0675 , H01S3/06758 , H01S3/094007 , H01S3/10023 , H01S3/302 , H01S2301/02 , H01S2301/03
摘要： Fiber light amplifiers adapted for high power application are provided. In embodiments of the invention, the light signal to be amplified is coupled to a cladding mode of an active waveguide region which is cladding doped. The amplified light is coupled to an output fiber have waveguiding properties matching those of the active cladding of the active waveguide region. In other embodiments, two or more amplifying stages are provided coupled by a wavelength selective loss element which couples the Stokes wave co-propagating with the signal to be amplified out of the signal guiding mode prior to the onset of SRS.
摘要翻译： 提供适用于大功率应用的光纤放大器。 在本发明的实施例中，要被放大的光信号耦合到作为包层掺杂的有源波导区域的包层模式。 放大的光耦合到具有与有源波导区域的有源包层匹配的波导特性的输出光纤。 在其它实施例中，通过波长选择性损耗元件耦合两个或更多个放大级，该波长选择性损耗元件在SRS发生之前将共同传播的斯托克斯波与要被放大的信号耦合出信号引导模式。
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52.发明申请公开(公告)号：US20090034925A1
公开(公告)日：2009-02-05
申请号：US12147806
申请日：2008-06-27
IPC分类号： G02B6/02
CPC分类号： G02B6/02214 , G02B6/02023 , G02B6/02095 , G02B6/03644 , G02B6/03688 , G02B6/29317 , G02B6/29374
摘要： Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP02 mode. The optical fibers also preferably have substantial separation between the effective indices of the HOM and any other mode.
摘要翻译： 公开了包含具有大于材料色散的总色散并且具有小于+ 50ps / nm-km的优选色散值的光纤的光纤装置。 当光基本上位于光纤的单个高阶模式（HOM）中时，通常是LP02模式，获得期望的色散值。 光纤还优选地在HOM的有效索引和任何其它模式之间具有相当大的间隔。
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53.发明授权Multimode long period fiber bragg grating machined by ultrafast laser direct writing 失效通过超快激光直接写入加工的多模长周期光纤布拉格光栅公开(公告)号：US07376307B2
公开(公告)日：2008-05-20
申请号：US10976524
申请日：2004-10-29
申请人： Rajminder Singh , Ming Li , Jimmy Yi-Jie Jia , Xinbing Liu , Tetsuo Ohara
发明人： Rajminder Singh , Ming Li , Jimmy Yi-Jie Jia , Xinbing Liu , Tetsuo Ohara
IPC分类号： G02B6/34
CPC分类号： G02B6/02095 , G02B6/02085 , G02B6/02147 , G02B2006/0209 , H01S5/12 , H01S5/141 , H01S5/4068
摘要： A multimode long period fiber Bragg grating (LPFBG) for a predetermined wavelength band. The LPFBG formed of a non-photosensitive material having an initial index of refraction. The multimode optical fiber core includes a substantially cylindrical surface, a longitudinal core axis, a core radius, and a number of index-altered portions having an altered index of refraction different from the initial cladding index of refraction. Each of the index-altered multimode optical fiber core has a first transmission surface and second transmission surface that is substantially parallel to the first transmission surface. Also, these index-altered portions are arranged within the non-photosensitive material of the multimode optical fiber core such that the first transmission surface of one portion of the plurality of index-altered portions is substantially parallel to the second transmission surface of a neighboring portion to form a long period Bragg grating structure.
摘要翻译： 用于预定波长带的多模长周期光纤布拉格光栅（LPFBG）。 LPFBG由具有初始折射率折射率的非感光材料形成。 多模光纤芯包括具有与初始包层折射率不同的改变的折射率的基本圆柱形表面，纵向芯轴，芯半径和多个折射率改变部分。 每个索引改变的多模光纤芯具有基本上平行于第一传输表面的第一传输表面和第二传输表面。 此外，这些折射率改变部分布置在多模光纤芯的非感光材料内，使得多个折射率改变部分中的一部分的第一透射表面基本上平行于相邻部分的第二透射表面 形成长周期布拉格光栅结构。
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公开(公告)号：US07221814B2
公开(公告)日：2007-05-22
申请号：US10521335
申请日：2003-07-23
IPC分类号： G02B6/00
CPC分类号： G02B6/022 , A61B5/1077 , A61B5/1135 , G02B6/02095 , G02B6/29319 , G02B6/29322 , G02B6/29356
摘要： Surface profiling apparatus (10) according to one embodiment comprises three long period gratings (LPGs) (12, 14, 16) fabricated in progressive three layered (PTL) fibre (18) and embedded within a deformable carrier member (40) comprising a skeleton (42) provided between two sheets of flexible rubber skin (44, 46). The LPGs (12, 14, 16) are illuminated by three wavelength modulated, narrow bandwidth optical signals, each having a different wavelength and modulation frequency. A photodetector (26) connected to three lock-in amplifiers (28, 30, 32) measures the amplitudes of the first and second harmonic frequency components of the photodetector output signal corresponding to each LPG (12, 14, 16). Similar surface profiling apparatus (10) forms the basis for respiratory function monitoring apparatus (100) in which five LPGs are provided within each of four PTL fibres (104, 106, 108, 110) and embedded in four carrier members (40a–d) attached to a garment (114) to be worn by a subject.
摘要翻译： 根据一个实施例的表面轮廓设备（10）包括以渐进三层（PTL）纤维（18）制造并嵌入在包括骨架的可变形载体构件（40）内的三个长周期光栅（LPG）（12,14,16） （42）设置在两片柔性橡胶表皮（44,46）之间。 LPG（12,14,16）由三个波长调制窄带宽光信号照亮，每个具有不同的波长和调制频率。 连接到三个锁定放大器（28,30,32）的光电检测器（26）测量对应于每个LPG（12,14,16）的光电检测器输出信号的第一和第二谐波频率分量的振幅。 类似的表面轮廓设备（10）形成呼吸功能监测设备（100）的基础，其中在四个PTL光纤（104,106,108,110）的每一个内提供五个LPG并嵌入四个载体构件（40a-d） 附着到要被受试者佩戴的衣服（114）上。
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公开(公告)号：US07110644B2
公开(公告)日：2006-09-19
申请号：US11097478
申请日：2005-04-01
IPC分类号： G02B6/34
CPC分类号： G02B6/02095 , H01S3/0675 , H01S3/06754 , H01S2301/04
摘要： A mode coupling device is provided for coupling co-propagating modes in an optical waveguide to provide a gain flattening filter for use with an optical amplifier such as an erbium-doped fiber amplifier. The mode coupling device includes a plurality of long period grating sections having equal spatial periods, with adjacent grating sections separated by an interval of less than 10 periods in length. Also provided is a method for manufacturing the mode coupling device, including a method for determining the parameters of the device and a method for fine tuning the device to provide a loss spectrum closely matching the output spectrum of the optical amplifier. The mode coupling device is useful for flattening the gain of the optical amplifier.
摘要翻译： 提供了一种用于耦合光波导中的共同传播模式的模式耦合装置，以提供与诸如掺铒光纤放大器的光放大器一起使用的增益平坦化滤波器。 模式耦合装置包括具有相等空间周期的多个长周期光栅部分，其中相邻的光栅部分以长度小于10个周期的间隔隔开。 还提供了一种用于制造模式耦合装置的方法，包括用于确定装置的参数的方法和用于微调装置以提供与光放大器的输出光谱紧密匹配的损耗谱的方法。 模式耦合器件可用于平坦化光放大器的增益。
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公开(公告)号：US07095924B2
公开(公告)日：2006-08-22
申请号：US10869882
申请日：2004-06-18
IPC分类号： G02B6/34
CPC分类号： G02B6/02085 , G02B6/02095 , G02B6/14 , G02B6/29317
摘要： An optical filter comprises a first mode converter converting an incident light signal propagating in an incident mode into a signal propagating in a propagation mode LPnm of order higher than that of said incident mode; a second mode converter converting the light signal of higher propagation order LPnm into a signal propagating in the incident propagation mode; and a slanted Bragg grating disposed between said first and second mode converters and adapted to couple the higher propagation order light signal LPnm in back-propagation into said incident mode. The filter is applicable to flattening gain and to multiplexing DWDM signals.
摘要翻译： 光滤波器包括：将入射模式传播的入射光信号转换为以比所述入射模式高的传播模式LPnm传播的信号的第一模式转换器; 第二模式转换器将较高传播阶数LPnm的光信号转换为在入射传播模式中传播的信号; 以及设置在所述第一和第二模式转换器之间并适于将反向传播中的较高传播级光信号LPnm耦合到所述入射模式中的倾斜布拉格光栅。 滤波器适用于平坦化增益和复用DWDM信号。
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公开(公告)号：US07010182B2
公开(公告)日：2006-03-07
申请号：US10417976
申请日：2003-04-17
IPC分类号： G02B6/00
CPC分类号： G01N21/774 , B82Y20/00 , G01N21/553 , G01N2021/7716 , G02B6/02033 , G02B6/02095 , G02B6/1221 , G02B6/1226
摘要： A biosensor having enhanced sensitivity to physical or chemical parameters comprises a waveguide and a coating disposed on the waveguide. The coating has a refractive index that enhances the sensitivity of the biosensor to physical or chemical parameters. In a preferred embodiment, the coating comprises at least one dendrimer disposed on the waveguide, wherein the coating has a refractive index ranging from about 1.0 to about 1.5. A method for fabrication of the biosensor is also provided.
摘要翻译： 具有对物理或化学参数的敏感性增强的生物传感器包括布置在波导上的波导和涂层。 涂层具有提高生物传感器对物理或化学参数的敏感性的折射率。 在优选的实施方案中，涂层包含设置在波导上的至少一个树状聚合物，其中涂层的折射率范围为约1.0至约1.5。 还提供了生物传感器的制造方法。
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公开(公告)号：US20050244094A1
公开(公告)日：2005-11-03
申请号：US10521335
申请日：2003-07-23
CPC分类号： G02B6/022 , A61B5/1077 , A61B5/1135 , G02B6/02095 , G02B6/29319 , G02B6/29322 , G02B6/29356
摘要： Surface profiling apparatus (10) according to one embodiment comprises three long period gratings (LPGs) (12, 14, 16) fabricated in progressive three layered (PTL) fibre (18) and embedded within a deformable carrier member (40) comprising a skeleton (42) provided between two sheets of flexible rubber skin (44, 46). The LPGs (12, 14, 16) are illuminated by three wavelength modulated, narrow bandwidth optical signals, each having a different wavelength and modulation frequency. A photodetector (26) connected to three lock-in amplifiers (28, 30, 32) measures the amplitudes of the first and second harmonic frequency components of the photodetector output signal corresponding to each LPG (12, 14, 16). Similar surface profiling apparatus (10) forms the basis for respiratory function monitoring apparatus (100) in which five LPGs are provided within each of four PTL fibres (104, 106, 108, 110) and embedded in four carrier members (40a-d) attached to a garment (114) to be worn by a subject.
摘要翻译： 根据一个实施例的表面轮廓设备（10）包括以渐进三层（PTL）纤维（18）制造并嵌入在包括骨架的可变形载体构件（40）内的三个长周期光栅（LPG）（12,14,16） （42）设置在两片柔性橡胶表皮（44,46）之间。 LPG（12,14,16）由三个波长调制窄带宽光信号照亮，每个具有不同的波长和调制频率。 连接到三个锁定放大器（28,30,32）的光电检测器（26）测量对应于每个LPG（12,14,16）的光电检测器输出信号的第一和第二谐波频率分量的振幅。 类似的表面轮廓设备（10）形成呼吸功能监测设备（100）的基础，其中在四个PTL光纤（104,106,108,110）中的每一个内提供五个LPG，并且嵌入四个载体成员（40Ad）中 到被摄体穿着的衣服（114）。
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公开(公告)号：US20050191007A1
公开(公告)日：2005-09-01
申请号：US11097478
申请日：2005-04-01
申请人： Victor Grubsky , Dmitry Starodubov
发明人： Victor Grubsky , Dmitry Starodubov
CPC分类号： G02B6/02095 , H01S3/0675 , H01S3/06754 , H01S2301/04
摘要： A mode coupling device is provided for coupling co-propagating modes in an optical waveguide to provide a gain flattening filter for use with an optical amplifier such as an erbium-doped fiber amplifier. The mode coupling device includes a plurality of long period grating sections having equal spatial periods, with adjacent grating sections separated by an interval of less than 10 periods in length. Also provided is a method for manufacturing the mode coupling device, including a method for determining the parameters of the device and a method for fine tuning the device to provide a loss spectrum closely matching the output spectrum of the optical amplifier. The mode coupling device is useful for flattening the gain of the optical amplifier.
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公开(公告)号：US06845194B2
公开(公告)日：2005-01-18
申请号：US10167684
申请日：2002-06-11
CPC分类号： G02B6/02095 , G02B6/12007 , G02B6/14 , G02B6/255 , G02B6/29319 , G02B6/29389 , G02B6/4215 , G02B2006/12107 , H01S3/0675 , H01S3/08027 , H01S3/139
摘要： The specification describes an optical filter wherein long period gratings (LPGs) are used in a new configuration to provide in-line bandpass filtering of optical signals. In the basic embodiment, two dissimilar LPGs are installed in the optical fiber transmission line. The first LPG converts light, over a broad wavelength range, being transmitted in the fundamental, or LP01, mode of the optical fiber transmission line into light in a higher order mode (HOM) of the optical fiber. The mode-converted signal, with mode LPm,n, is then coupled to a second waveguide, the second waveguide having transmission characteristics different from those of the first. The second waveguide supports propagation of light in a LPm,n mode. The mode-converted signal is then transmitted through a second LPG where the signal over a selected narrow band of wavelengths that is accepted by the second LPG is converted back to a LP01 mode. The selected narrow band in the LP01 mode propagates efficiently over the remainder of the optical fiber transmission path.
摘要翻译： 本说明书描述了一种滤光器，其中在新配置中使用长周期光栅（LPG），以提供光信号的线内带通滤波。 在基本实施例中，在光纤传输线路中安装两个不同的LPG。 第一LPG将在光纤传输线的基本或LP01模式中的宽波长范围内的光转换成光纤的高阶模式（HOM）的光。 模式转换后的信号，模式LPm，n，然后耦合到第二波导，第二波导具有不同于第一波导的传输特性。 第二个波导支持LPm，n模式下的光的传播。 然后通过第二LPG传输经模式转换的信号，其中由第二LPG接受的选定的窄波段上的信号被转换回LP01模式。 LP01模式中所选择的窄带在光纤传输路径的其余部分有效传播。
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