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公开(公告)号：US09244218B2
公开(公告)日：2016-01-26
申请号：US13261818
申请日：2012-08-10
申请人： Kazi S. Abedin , John M. Fini , Man F. Yan
发明人： Kazi S. Abedin , John M. Fini , Man F. Yan
CPC分类号： G02B6/02057 , G02B6/02071 , G02B6/02095 , G02B6/02295 , G02B6/0288 , G02B6/14 , G02B6/26 , G02B6/268 , G02F1/0115 , H01S3/0675 , H01S3/06758 , H01S3/094007 , H01S3/302 , H01S2301/20
摘要： A few-moded fiber device has several discrete sections of few-moded fibers that are separated by mode converters, with each mode converter accomplishing mode conversion between one or more pairs of modes. The mode conversions can be accomplished using a sequence, such as a periodic or cyclic sequence that would cause (1) a signal wave launched with any mode to assume every other mode for one or more times; (2) the number of times the signal remains in any modal state is substantially the same; and (3) the net signal gain or loss or group delay of the input signal is substantially the same regardless of the state of input mode. A laser few-mode amplifier is provided. An optical transmission system is also provided.
摘要翻译： 几个模式的光纤设备具有由模式转换器分离的几个模拟光纤的几个分立部分，每个模式转换器在一对或多对模式之间完成模式转换。 可以使用诸如周期性或循环序列的序列来实现模式转换，所述序列将导致（1）以任何模式发射的信号波以每隔一个模式呈现一次或多次; （2）信号保持在任何模式状态的次数基本相同; 和（3）无论输入模式的状态如何，输入信号的净信号增益或损耗或组延迟基本相同。 提供了一种激光多模放大器。 还提供一种光传输系统。
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公开(公告)号：US09946014B2
公开(公告)日：2018-04-17
申请号：US14126564
申请日：2012-06-20
申请人： Kazi S. Abedin , Thierry F. Taunay , Man F. Yan , Benyuan Zhu
发明人： Kazi S. Abedin , Thierry F. Taunay , Man F. Yan , Benyuan Zhu
CPC分类号： G02B6/02042 , G02B6/03633 , G02B6/2552 , G02B6/262 , H01S3/06737 , H01S3/06754 , H01S3/094003 , H01S3/09415 , H01S3/1608
摘要： An optical pedestal fiber is configured to be taperable to form a tapered fiber having a mode field diameter at the tapered end that differs from the mode field diameter at the untapered end in correspondence with the difference between the cladding diameter at the tapered end and the cladding diameter at the untapered end. A plurality of such pedestal fibers can be used to construct a tapered fiber bundle coupler that provides matching of both core pitch and mode field diameter between a plurality of input fibers and individual cores of a multicore fiber. Further, the tapered fiber bundle coupler can be constructed using a plurality of fibers, in which individual fibers are configured to have different effective refractive indices, thereby suppressing crosstalk therebetween.
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3.发明申请Raman Distributed Feedback Fiber Laser and High Power Laser System Using the Same 有权拉曼分布反馈光纤激光和大功率激光系统使用它公开(公告)号：US20140112357A1
公开(公告)日：2014-04-24
申请号：US14113524
申请日：2012-04-25
IPC分类号： H01S3/30
CPC分类号： H01S3/302 , H01S3/0014 , H01S3/06712 , H01S3/0675 , H01S3/07 , H01S3/08022 , H01S3/0826 , H01S3/094003 , H01S3/094042 , H01S3/094046 , H01S3/1086
摘要： A Raman distributed feedback (DFB) fiber laser is disclosed. It includes a pump source and a Raman gain fiber of a length smaller than 20 cm containing a distributed feedback (DFB) grating with a discrete phase structure located within no more than 10% off the center of the grating and wherein the Raman DFB fiber laser generates a laser signal with an optical spectrum, which has an optical bandwidth at half maximum optical intensity of less than 1 gigahertz (GHz) (wherein a maximum intensity frequency is different from the frequency of the pump laser). The Raman laser includes compensation for the nonlinear phase change due to Kerr effect and thermal effect resulting from absorption of the optical field, thus enhancing the conversion efficiency.
摘要翻译： 公开了一种拉曼分布反馈（DFB）光纤激光器。 它包括长度小于20厘米的泵浦源和拉曼增益光纤，其包含分布反馈（DFB）光栅，离散相位结构位于离光栅中心不超过10％的范围内，其中拉曼DFB光纤激光器 产生具有小于1千兆赫兹（GHz）的最大光强度的光学带宽（其中最大强度频率与泵浦激光器的频率不同）的光谱的激光信号。 拉曼激光器包括由于克尔效应引起的非线性相位变化和由光场吸收产生的热效应的补偿，从而提高转换效率。
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公开(公告)号：US09568339B2
公开(公告)日：2017-02-14
申请号：US13990617
申请日：2011-12-02
申请人： Kazi S. Abedin , Paul S. Westbrook
发明人： Kazi S. Abedin , Paul S. Westbrook
CPC分类号： G01D5/268 , G01D5/35316 , G01D5/3537 , G01D5/3538 , G01H9/004 , G01J1/0425 , G01L1/243 , G01L1/246 , G01L11/025 , G01N2021/7716 , H04R23/008
摘要： Methods and systems using one or more distributed feedback (DFB) lasers for capturing changes in the lasing environment are disclosed. Specifically, a sensor for measuring a measurand, such as pressure or temperature, or changes in a measurand, includes a fiber with at least one core, at least one fiber laser cavity formed by a single fiber grating in the core, wherein the laser operates on at least two modes along at least part of its length. The DFB laser includes a section that is bent into a non-linear shape and at least one pump laser connected to the fiber laser cavity. When the DFB laser experiences a perturbation or measurand change that changes the spacing of the modes, a change in an RF beat note is generated. This beat note can then be measured and related to the measurand change.
摘要翻译： 公开了使用一个或多个分布式反馈（DFB）激光器捕获激光环境变化的方法和系统。 具体地说，用于测量诸如压力或温度的被测量或被测量的变化的传感器包括具有至少一个芯的光纤，由芯中的单个光纤光栅形成的至少一个光纤激光腔，其中激光器操作 沿其长度的至少一部分的至少两个模式。 DFB激光器包括弯曲成非线性形状的部分和连接到光纤激光腔的至少一个泵浦激光器。 当DFB激光器经历改变模式间距的扰动或被测量的变化时，产生RF拍音的变化。 然后可以测量这个拍音，并与被测量的变化相关。
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5.发明授权Raman distributed feedback fiber laser and high power laser system using the same 有权拉曼分布反馈光纤激光器和大功率激光系统使用相同公开(公告)号：US09325152B2
公开(公告)日：2016-04-26
申请号：US14113524
申请日：2012-04-25
CPC分类号： H01S3/302 , H01S3/0014 , H01S3/06712 , H01S3/0675 , H01S3/07 , H01S3/08022 , H01S3/0826 , H01S3/094003 , H01S3/094042 , H01S3/094046 , H01S3/1086
摘要： A Raman distributed feedback (DFB) fiber laser is disclosed. It includes a pump source and a Raman gain fiber of a length smaller than 20 cm containing a distributed feedback (DFB) grating with a discrete phase structure located within no more than 10% off the center of the grating and wherein the Raman DFB fiber laser generates a laser signal with an optical spectrum, which has an optical bandwidth at half maximum optical intensity of less than 1 gigahertz (GHz) (wherein a maximum intensity frequency is different from the frequency of the pump laser). The Raman laser includes compensation for the nonlinear phase change due to Kerr effect and thermal effect resulting from absorption of the optical field, thus enhancing the conversion efficiency.
摘要翻译： 公开了一种拉曼分布反馈（DFB）光纤激光器。 它包括长度小于20厘米的泵浦源和拉曼增益光纤，其包含分布反馈（DFB）光栅，离散相位结构位于离光栅中心不超过10％的范围内，其中拉曼DFB光纤激光器 产生具有小于1千兆赫兹（GHz）的最大光强度的光学带宽（其中最大强度频率与泵浦激光器的频率不同）的光谱的激光信号。 拉曼激光器包括由于克尔效应引起的非线性相位变化和由光场吸收产生的热效应的补偿，从而提高转换效率。
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公开(公告)号：US20140054451A1
公开(公告)日：2014-02-27
申请号：US13990617
申请日：2011-12-02
申请人： Kazi S. Abedin , Paul S. Westbrook
发明人： Kazi S. Abedin , Paul S. Westbrook
CPC分类号： G01D5/268 , G01D5/35316 , G01D5/3537 , G01D5/3538 , G01H9/004 , G01J1/0425 , G01L1/243 , G01L1/246 , G01L11/025 , G01N2021/7716 , H04R23/008
摘要： Methods and systems using one or more distributed feedback (DFB) lasers for capturing changes in the lasing environment are disclosed. Specifically, a sensor for measuring a measurand, such as pressure or temperature, or changes in a measurand, includes a fiber with at least one core, at least one fiber laser cavity formed by a single fiber grating in the core, wherein the laser operates on at least two modes along at least part of its length. The DFB laser includes a section that is bent into a non-linear shape and at least one pump laser connected to the fiber laser cavity. When the DFB laser experiences a perturbation or measurand change that changes the spacing of the modes, a change in an RF beat note is generated. This beat note can then be measured and related to the measurand change.
摘要翻译： 公开了使用一个或多个分布式反馈（DFB）激光器捕获激光环境变化的方法和系统。 具体地说，用于测量诸如压力或温度的被测量或被测量的变化的传感器包括具有至少一个芯的光纤，由芯中的单个光纤光栅形成的至少一个光纤激光腔，其中激光器操作 沿其长度的至少一部分的至少两个模式。 DFB激光器包括弯曲成非线性形状的部分和连接到光纤激光腔的至少一个泵浦激光器。 当DFB激光器经历改变模式间距的扰动或被测量的变化时，产生RF拍音的变化。 然后可以测量这个拍音，并与被测量的变化相关。
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