公开(公告)号：WO2012075474A3

公开(公告)日：2013-07-25

申请号：PCT/US2011063194

申请日：2011-12-02

Applicant: OFS FITEL LLC ,  ABEDIN KAZI S ,  WESTBROOK PAUL S

Inventor： ABEDIN KAZI S ,  WESTBROOK PAUL S

IPC: G02B6/00

CPC classification number: G01D5/268 ,  G01D5/35316 ,  G01D5/3537 ,  G01D5/3538 ,  G01H9/004 ,  G01J1/0425 ,  G01L1/243 ,  G01L1/246 ,  G01L11/025 ,  G01N2021/7716 ,  H04R23/008

Abstract: 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.

Abstract translation: 公开了使用一个或多个分布反馈（DFB）激光器来捕获激光环境中的变化的方法和系统。具体地，用于测量被测量的传感器，例如压力或温度，或被测量的变化，包括至少具有纤维 一个芯，由芯中的单个光纤光栅形成的至少一个光纤激光腔，其中所述激光器沿其长度的至少一部分沿至少两个模式工作。 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。

公开(公告)号：WO2012149068A1

公开(公告)日：2012-11-01

申请号：PCT/US2012/035065

申请日：2012-04-25

Applicant: OFS FITEL, LLC ,  ABEDIN, Kazi, S. ,  KREMP, Tristan ,  PORQUE, Jerome, C. ,  NICHOLSON, Jeffrey, W. ,  WESTBROOK, Paul, S.

Inventor： ABEDIN, Kazi, S. ,  KREMP, Tristan ,  PORQUE, Jerome, C. ,  NICHOLSON, Jeffrey, W. ,  WESTBROOK, Paul, S.

IPC: H01S3/30

CPC classification number: H01S3/302 ,  H01S3/0014 ,  H01S3/06712 ,  H01S3/0675 ,  H01S3/07 ,  H01S3/08022 ,  H01S3/0826 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/094046 ,  H01S3/1086

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2013023193A1

公开(公告)日：2013-02-14

申请号：PCT/US2012/050477

申请日：2012-08-10

Applicant: OFS FITEL, LLC ,  ABEDIN, Kazi, S. ,  FINI, John, M. ,  YAN, Man, F.

Inventor： ABEDIN, Kazi, S. ,  FINI, John, M. ,  YAN, Man, F.

IPC: G02B6/26

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2012075474A2

公开(公告)日：2012-06-07

申请号：PCT/US2011/063194

申请日：2011-12-02

Applicant: OFS FITEL, LLC ,  ABEDIN, Kazi, S. ,  WESTBROOK, Paul, S.

Inventor： ABEDIN, Kazi, S. ,  WESTBROOK, Paul, S.

IPC: G01N21/75

CPC classification number: G01D5/268 ,  G01D5/35316 ,  G01D5/3537 ,  G01D5/3538 ,  G01H9/004 ,  G01J1/0425 ,  G01L1/243 ,  G01L1/246 ,  G01L11/025 ,  G01N2021/7716 ,  H04R23/008

Abstract: 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.

Abstract translation: 公开了使用一个或多个用于捕获激光环境中的变化的分布反馈（DFB）激光器的方法和系统。具体地，用于测量被测量的传感器，例如压力或温度，或被测量的变化，包括具有至少 一个核心，至少一个光纤激光器腔，其由芯中的单个光纤光栅形成，其中所述激光器沿其长度的至少一部分沿至少两个模式工作。 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激光器。 当DFB激光器经历改变模式间隔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。

公开(公告)号：WO2012177808A1

公开(公告)日：2012-12-27

申请号：PCT/US2012/043410

申请日：2012-06-20

Applicant: OFS FITEL, LLC ,  ABEDIN, Kazi, S. ,  TAUNAY, Thierry, F. ,  YAN, Man, F ,  ZHU, Benyuan

Inventor： ABEDIN, Kazi, S. ,  TAUNAY, Thierry, F. ,  YAN, Man, F ,  ZHU, Benyuan

IPC: G02B6/38

CPC classification number: G02B6/02042 ,  G02B6/03633 ,  G02B6/2552 ,  G02B6/262 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/09415 ,  H01S3/1608

Abstract: 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.

Abstract translation: 光学基座光纤被构造成可以锥形化以形成锥形光纤，该锥形光纤在渐缩端处的模场直径不同于未尖端处的模场直径，与锥形端部的包层直径和包层之间的差对应 直径在无钳口端。 可以使用多个这样的基座纤维来构造锥形纤维束耦合器，其提供多芯输入光纤与多芯光纤的单个芯之间的芯间距和模场直径的匹配。 此外，锥形光纤束耦合器可以使用多个光纤构成，其中各个光纤被配置为具有不同的有效折射率，从而抑制它们之间的串扰。

公开(公告)号：WO2012088361A3

公开(公告)日：2012-09-13

申请号：PCT/US2011066677

申请日：2011-12-21

Applicant: OFS FITEL LLC ,  ABEDIN KAZI S ,  TAUNAY THIERRY F ,  YAN MAN F

Inventor： ABEDIN KAZI S ,  TAUNAY THIERRY F ,  YAN MAN F

IPC: G02B27/30

CPC classification number: G02B27/30 ,  G02B3/0056 ,  G02B3/0087 ,  G02B6/02042 ,  G02B6/262

Abstract: A multicore collimator collimates light signals transmitted by respective cores of a multicore fiber. An array of gradient-index lens includes a plurality of individual gradient- index lenses corresponding to respective cores of the multicore fiber. The plurality of gradient-index lenses extends through a lens array body between an input end and an output end thereof and has a lens-to-lens spacing that is larger than the core-to-core spacing of the multicore fiber. A taper at the input end of the array of gradient-index lenses provides a tapered transition between the core-to-core spacing of the multicore fiber and the lens-to-lens spacing of the array of gradient-index lenses. The array of gradient-index lenses is configured to collimate the light signals outputs from the coupler, and to provide the collimated light signals as an output at the output end of the array of gradient-index lenses.

Abstract translation: 多核准直仪准直由多芯光纤的各个核发送的光信号。 梯度折射率透镜的阵列包括对应于多芯光纤的各个核的多个单独的梯度折射率透镜。 多个梯度折射率透镜在输入端和输出端之间延伸穿过透镜阵列体，并且具有比多芯光纤的芯 - 芯间隔更大的透镜与透镜间隔。 在渐变折射率透镜阵列的输入端处的锥度提供了多芯光纤的芯 - 芯间距与渐变折射率透镜阵列的透镜与透镜间距之间的渐变过渡。 梯度折射率透镜的阵列被配置为对来自耦合器的光信号的输出进行准直，并且在渐变折射率透镜阵列的输出端提供准直光信号作为输出。

公开(公告)号：WO2012088361A2

公开(公告)日：2012-06-28

申请号：PCT/US2011/066677

申请日：2011-12-21

Applicant: OFS FITEL, LLC ,  ABEDIN, Kazi, S. ,  TAUNAY, Thierry, F. ,  YAN, Man, F.

Inventor： ABEDIN, Kazi, S. ,  TAUNAY, Thierry, F. ,  YAN, Man, F.

IPC: G02B27/30

CPC classification number: G02B27/30 ,  G02B3/0056 ,  G02B3/0087 ,  G02B6/02042 ,  G02B6/262

Abstract: A multicore collimator collimates light signals transmitted by respective cores of a multicore fiber. An array of gradient-index lens includes a plurality of individual gradient- index lenses corresponding to respective cores of the multicore fiber. The plurality of gradient-index lenses extends through a lens array body between an input end and an output end thereof and has a lens-to-lens spacing that is larger than the core-to-core spacing of the multicore fiber. A taper at the input end of the array of gradient-index lenses provides a tapered transition between the core-to-core spacing of the multicore fiber and the lens-to-lens spacing of the array of gradient-index lenses. The array of gradient-index lenses is configured to collimate the light signals outputs from the coupler, and to provide the collimated light signals as an output at the output end of the array of gradient-index lenses.

Abstract translation: 多核准直器准直由多芯光纤的各个核心传输的光信号。 梯度折射率透镜阵列包括对应于多芯光纤的各个芯的多个单独梯度折射率透镜。 多个梯度折射率透镜在其输入端和输出端之间延伸通过透镜阵列体，并且具有比多芯光纤的纤芯 - 纤芯间距大的透镜 - 透镜间距。 在梯度折射率透镜阵列的输入端处的锥形提供了多芯光纤的核心 - 核心间距与梯度折射率透镜阵列的透镜 - 透镜间距之间的渐缩过渡。 梯度折射率透镜阵列被配置为准直来自耦合器的光信号输出，并且提供准直光信号作为梯度折射率透镜阵列的输出端处的输出。