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公开(公告)号：US20130216176A1
公开(公告)日：2013-08-22
申请号：US13401239
申请日：2012-02-21
申请人： Ming-Jun Li , Shenping Li
发明人： Ming-Jun Li , Shenping Li
IPC分类号： G02B6/00
CPC分类号： G01K11/32 , G01D5/35364 , G01L1/246 , G02B6/02009 , G02B6/03611
摘要： A sensing optical fiber comprising: a few-moded multi-segment core, said core comprising one core segment surrounded by another core segment, and at least one cladding surrounding said core; said core having an F factor (μm2) of 100 μm2 to 350 μm2, and is constructed to provide (i) an overlap integral between the fundamental optical guided mode and the fundamental acoustic guided mode of greater than 0.7 and (ii) the overlap integral between the LP11 optical guided mode and the fundamental acoustic guided mode at least 0.45.
摘要翻译： 一种感测光纤，包括：多模多芯芯，所述芯包括由另一芯部段包围的一个芯部段和围绕所述芯的至少一个包层; 所述芯具有100m2到350mum2的F因子（mum2），并且被构造成提供（i）基本光学引导模式和基本声导引模式之间的重叠积分大于0.7，以及（ii）重叠积分 在LP11光导模式和基本声导模之间至少为0.45。
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12.发明授权公开(公告)号：US08385695B2
公开(公告)日：2013-02-26
申请号：US12623973
申请日：2009-11-23
申请人： Ming-Jun Li , Shenping Li
发明人： Ming-Jun Li , Shenping Li
CPC分类号： G01J3/10 , G01J3/4406 , H01S3/0057 , H01S3/0675 , H01S3/06754 , H01S3/06791 , H01S3/2383
摘要： A nonlinear fluorescence imaging system and method for generating fluorescence imaging includes a pulsed laser source for generating laser pulses at a first wavelength and an optical pulse stretcher including one or more optical pulse stretcher fibers having a first dispersion parameter at the first wavelength. The system also includes a probe for interfacing with a sample to deliver the laser pulses and extract fluorescence signals excited in the sample. One or more optical delivery fibers are included for delivering the laser pulses and collecting nonlinear fluorescence signals. The optical delivery fiber has a second dispersion parameter at the first wavelength which is opposite a polarity of the first dispersion parameter. A detector detects images based on the collected fluorescence signals.
摘要翻译： 用于产生荧光成像的非线性荧光成像系统和方法包括用于产生第一波长的激光脉冲的脉冲激光源和包括具有第一波长的第一色散参数的一个或多个光脉冲展宽光纤的光脉冲展宽器。 该系统还包括用于与样品接口以传送激光脉冲并提取在样品中激发的荧光信号的探针。 包括一个或多个光学传递光纤用于传送激光脉冲和收集非线性荧光信号。 光传送光纤具有与第一色散参数的极性相反的第一波长的第二色散参数。 检测器基于收集的荧光信号检测图像。
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公开(公告)号：US08995803B2
公开(公告)日：2015-03-31
申请号：US13759198
申请日：2013-02-05
CPC分类号： G02B6/268 , G02B6/0288 , G02B6/0365
摘要： An optical fiber link suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The link has a first optical fiber having a core which supports the propagation and transmission of an optical signal with X LP modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and less than or equal to 20, the first fiber having a positive differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570. The link also has a second optical fiber having a core which supports the propagation and transmission of an optical signal with Y LP modes at a wavelength of 1550 nm, wherein Y is an integer greater than 1 and less than or equal to 20, said optical fiber having a negative differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570.
摘要翻译： 公开了适用于模分多路复用（MDM）光传输系统的光纤链路。 该链路具有第一光纤，其具有支持在1550nm的波长下具有X LP模式的光信号的传播和传输的核心，其中X是大于1且小于等于20的整数，第一光纤 在1530-1570之间的波长在LP01和LP11模式之间具有正差分模式组延迟。 该链路还具有第二光纤，其具有支持在1550nm的波长下具有Y LP模式的光信号的传播和传输的核，其中Y是大于1且小于或等于20的整数，所述光 光纤在1530-1570之间的波长在LP01和LP11模式之间具有负差模模式延迟。
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公开(公告)号：US20130216181A1
公开(公告)日：2013-08-22
申请号：US13759198
申请日：2013-02-05
IPC分类号： G02B6/26
CPC分类号： G02B6/268 , G02B6/0288 , G02B6/0365
摘要： An optical fiber link suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The link has a first optical fiber having a core which supports the propagation and transmission of an optical signal with X LP modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and less than or equal to 20, the first fiber having a positive differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570. The link also has a second optical fiber having a core which supports the propagation and transmission of an optical signal with Y LP modes at a wavelength of 1550 nm, wherein Y is an integer greater than 1 and less than or equal to 20, said optical fiber having a negative differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570.
摘要翻译： 公开了适用于模分多路复用（MDM）光传输系统的光纤链路。 该链路具有第一光纤，其具有支持在1550nm的波长下具有X LP模式的光信号的传播和传输的核心，其中X是大于1且小于等于20的整数，第一光纤 在1530-1570之间的波长在LP01和LP11模式之间具有正差分模式组延迟。 该链路还具有第二光纤，其具有支持在1550nm的波长下具有Y LP模式的光信号的传播和传输的核，其中Y是大于1且小于或等于20的整数，所述光 光纤在1530-1570之间的波长在LP01和LP11模式之间具有负差模模式延迟。
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公开(公告)号：US20110200802A1
公开(公告)日：2011-08-18
申请号：US13020196
申请日：2011-02-03
CPC分类号： B29C66/712 , B29C65/1616 , B29C65/1619 , B29C65/1635 , B29C65/1638 , B29C65/1661 , B29C65/1667 , B29C65/1674 , B29C65/168 , B29C65/8253 , B29C66/1122 , B29C66/30621 , B29C66/43 , B29C66/71 , B29C66/73366 , B29C66/73921 , B29C66/81267 , B29C66/8282 , B29C66/836 , B29C66/91645 , B29C66/919 , B29C66/934 , B29C66/939 , B29C66/949 , B29K2025/00 , B29K2067/00 , B29K2069/00 , B29K2071/12 , B29K2105/0088 , B29K2995/0026 , B29K2995/0027 , Y10T428/24826 , B29K2067/003 , B29K2065/00 , B29K2025/06
摘要： Disclosed herein are methods for laser welding together layers of transparent polymeric materials by first making high-contrast marks in transparent polymeric materials using femtosecond, picosecond or nanosecond pulsed fiber lasers and then creating localized welds at the areas of the high-contrast marks. Such welds can be formed in multiple layers of transparent polymeric materials. Systems for making welds and parts welded together according to the methods also disclosed.
摘要翻译： 本文公开了通过首先在使用飞秒，皮秒或纳秒脉冲光纤激光器的透明聚合物材料中制造高对比度标记然后在高对比度标记的区域上产生局部焊缝来将透明聚合材料层激光焊接在一起的方法。 这种焊缝可以形成在多层透明聚合材料中。 根据所公开的方法制造焊接部件和焊接在一起的部件。
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公开(公告)号：US20080285753A1
公开(公告)日：2008-11-20
申请号：US11804387
申请日：2007-05-18
IPC分类号： H04K1/00
CPC分类号： H04B10/85 , H04B10/2581
摘要： A system for passively scrambling and unscrambling a, pulse optical signal transmitted through a multi-mode optical fiber is provided. The system includes a scrambling unit connected between a signal receiving end of said transmission fiber and an optical signal source that includes an optical fiber which creates a differential delay between two groups of optical modes of the signal that is at least one bit period long such that said optical signal is passively scrambled, and an unscrambling unit connected to a signal transmitting end of said transmission fiber having an optical fiber that counteracts said differential delay between said two groups of optical modes of the signal such that said optical signal is passively unscrambled. The scrambling unit optical fiber has an alpha profile with a complementary perturbation that creates the differential delay between two groups of optical modes of the signal, and the unscrambling unit optical fiber has an alpha profile with reversal complementary perturbation that counteracts the differential delay between said two groups of optical modes of the signal. Alternatively, the scrambling and unscrambling units may have the combination of a mode splitter that splits the signal into two different groups of optical modes, and a pair of optical fibers that conduct the two groups of optical modes in parallel, the fibers being of different lengths to create or to counteract a differential delay in the two groups of modes.
摘要翻译： 提供一种用于被动加扰和解扰通过多模光纤传输的脉冲光信号的系统。 该系统包括连接在所述传输光纤的信号接收端和光信号源之间的加扰单元，所述光信号源包括光纤，该光纤在至少一位周期长的信号的两组光模之间产生差分延迟，使得 所述光信号被无源加扰，并且一个解扰单元连接到具有光纤的所述传输光纤的信号发送端，该光纤抵消所述信号的所述两组光模之间的所述差分延迟，使得所述光信号被被动地解扰。 加扰单元光纤具有具有互补扰动的α分布，其产生信号的两组光模式之间的差分延迟，并且解扰单元光纤具有反转互补扰动的α分布，其抵消所述两个 信号组的光模式。 或者，加扰和解扰单元可以具有将信号分解成两个不同组的光模式的模式分离器的组合，以及并行地传导两组光学模式的一对光纤，纤维具有不同的长度 以创建或抵消两组模式中的差分延迟。
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17.发明申请High energy, ultrashort pulse ring fiber laser having a linear dispersion compensator with chirped Bragg gratings 审中-公开具有啁啾布拉格光栅的线性色散补偿器的高能超短脉冲光纤激光器公开(公告)号：US20080025348A1
公开(公告)日：2008-01-31
申请号：US11495204
申请日：2006-07-28
IPC分类号： H01S3/30
CPC分类号： H01S3/06791 , H01S3/06712 , H01S3/06725 , H01S3/0675 , H01S3/1053 , H01S3/1112 , H01S2301/08
摘要： A high energy, ultra short pulse ring fiber laser is provided that includes a passively mode locked, all optical fiber laser formed from a closed loop of optical fiber doped with erbium or other rare earth metal, a pump light source optically coupled to the loop of optical fiber, and a linear dispersion compensator that includes a pair of chirped Bragg gratings with substantially equal but opposite sign dispersion. The difference in dispersion between the pair of chirped Bragg gratings is adjusted so that it is substantially equal and opposite to the dispersion generated in the loop of optical fiber. The linear dispersion compensator includes a tuner which can individually stretch or compress the pair of chirped fiber Bragg gratings such that one of the gratings can be adjusted to cancel out the dispersion of the ring laser cavity, while the other grating is adjusted to eliminate third order dispersion of the cavity.
摘要翻译： 提供了一种高能量，超短脉冲环形光纤激光器，其包括被动模式锁定，由掺杂有铒或其它稀土金属的光纤的闭环形成的所有光纤激光器，光耦合到 光纤和线性色散补偿器，其包括具有基本相等但相反符号色散的一对啁啾布拉格光栅。 调整一对啁啾布拉格光栅之间的色散差异，使其与在光纤环路中产生的色散基本相等。 线性色散补偿器包括可以单独地拉伸或压缩一对啁啾光纤布拉格光栅的调谐器，使得可以调节一个光栅以抵消环形激光腔的色散，而另一个光栅被调整以消除三阶 腔的分散。
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公开(公告)号：US20090323735A1
公开(公告)日：2009-12-31
申请号：US12215257
申请日：2008-06-26
CPC分类号： G02B6/03627 , G02B6/03644 , H01S3/0057 , H01S3/067
摘要： An optical fiber for performing pulse stretching, and fiber laser systems and methods using the pulse-stretching fiber are disclosed. The pulse-stretching (PS) fiber has low fourth-order dispersion (dispersion curvature) and a third order dispersion (dispersion slope) with a small negative, nearly zero or small positive value. Two different types of fiber laser systems that use the PS fiber in a manner that achieves optimum performance are described. The PS fiber enables an all-fiber (up to the final pulse compressor) ultra-short pulsed laser systems reaching pulse energies exceeding 100 μJ, average powers exceeding 100 W, and output pulse widths of less than 100 fs.
摘要翻译： 公开了一种用于进行脉冲拉伸的光纤，以及使用脉冲拉伸光纤的光纤激光系统和方法。 脉冲拉伸（PS）光纤具有低的四阶色散（色散曲率）和三阶色散（色散斜率），具有小的负数，几乎为零或小的正值。 描述了以实现最佳性能的方式使用PS光纤的两种不同类型的光纤激光系统。 PS光纤使得全光纤（直到最终脉冲压缩器）的超短脉冲激光系统达到超过100μJ的脉冲能量，平均功率超过100W，输出脉冲宽度小于100fs。
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公开(公告)号：US20090003391A1
公开(公告)日：2009-01-01
申请号：US11823680
申请日：2007-06-28
申请人： Shenping Li
发明人： Shenping Li
IPC分类号： H01S3/30
CPC分类号： H01S3/06791 , H01S3/06725 , H01S3/0675 , H01S3/08 , H01S3/08009 , H01S3/094042 , H01S3/09415 , H01S3/1055 , H01S3/1118 , H01S3/1618
摘要： A ring-cavity, passively mode locked fiber laser capable of producing short-pulse-width optical pulses at a relatively low repetition rate. The fiber laser uses a one-way ring-cavity geometry with a chirped fiber Bragg grating (CFBG) at its reflecting member. The CFBG is part of a dispersion compensator that includes an optical circulator that defines a one-way optical path through the ring cavity. A doped optical fiber section is arranged in the optical path and serves as the gain medium. A pump light source provides the pump light to excite the dopants and cause the gain medium to lase. A saturable absorber is operable to effectuate passive mode-locking of the multiple modes supported by the ring cavity. The ring cavity geometry allows to achieve mode locking with single pulse operation in a longer cavity length than conventional linear cavities. Furthermore, the longer cavity length reduces the constraints on the chirp rate of the CFBG. This, in turn, allows the CFBG to have a relatively high reflectivity, which provides the necessary dispersion compensation and cavity loss for generating short optical pulses at a low repetition rate.
摘要翻译： 环形腔，被动锁模光纤激光器，能够以相对低的重复频率产生短脉冲宽度的光脉冲。 光纤激光器在其反射部件处使用具有啁啾光纤布拉格光栅（CFBG）的单向环形腔几何形状。 CFBG是色散补偿器的一部分，其包括限定通过环形空腔的单向光路的光学循环器。 掺杂光纤部分布置在光路中并用作增益介质。 泵浦光源提供泵浦光以激发掺杂剂并且使增益介质变薄。 可饱和吸收器可操作以实现由环形腔支撑的多个模式的被动模式锁定。 环腔几何形状允许在比常规线性腔更长的腔长度内实现单脉冲操作的模式锁定。 此外，较长的腔体长度减少了对CFBG的啁啾率的限制。 这反过来又允许CFBG具有相对高的反射率，这提供了必要的色散补偿和空腔损耗，用于以低重复率产生短光脉冲。
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公开(公告)号：US20060198588A1
公开(公告)日：2006-09-07
申请号：US11073278
申请日：2005-03-04
IPC分类号： G02B6/00
CPC分类号： G02F1/353 , G02B6/02242 , G02B6/03627 , G02B6/29377 , G02F2001/3507 , G02F2001/3528
摘要： A supercontinuum light emitting device comprises an effectively CW light source producing light of wavelength λ1 within a specified bandwidth and a nonlinear fiber optically coupled to the light source. The nonlinear fiber has a plurality of fiber segments with different zero dispersion wavelengths λoi, where each successive fiber segment has zero dispersion wavelength λoi which is larger than the zero dispersion wavelength of the preceding fiber and the zero dispersion wavelength of the first fiber segment is within ±20 nm of λ1.
摘要翻译： 超连续谱发光装置包括在特定带宽内产生波长λ1的光的有效CW光源和与光源光学耦合的非线性光纤。 非线性光纤具有多个具有不同零色散波长的光纤段，其中每个相继的光纤段具有大于零色散波长的零色散波长λ 并且第一光纤段的零色散波长在λ1±1nm的±20nm范围内。
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