公开(公告)号：US09377593B2

公开(公告)日：2016-06-28

申请号：US14547183

申请日：2014-11-19

Applicant: Lumentum Operations LLC

Inventor： Xiuquan Ma ,  Hongbo Yu ,  Martin H. Muendel

IPC: G02B6/255 ,  C03B37/02 ,  G02B6/42 ,  G02B6/38 ,  G01M11/00 ,  H04B10/2581 ,  G02B6/36

CPC classification number: G02B6/4221 ,  G01M11/33 ,  G02B6/2555 ,  G02B6/3656 ,  G02B6/3801 ,  H04B10/2581

Abstract: Alignment of a multimode waveguide to a source of light or another waveguide is evaluated using a multi-wavelength light source and a modal decomposition processing of an intensity profile of a waveguide output beam, wherein inter-modal interference is averaged out over wavelength. Fitting a superposition of mode intensity profiles to a wavelength-averaged intensity profile of the output beam provides information about the modal composition of the output beam, which may be used to assess the alignment of the multimode waveguide with respect to the input light beam, and to provide a feedback for guiding a waveguide alignment process.

Abstract translation: 使用多波长光源和波导输出光束的强度分布的模态分解处理来评估多模波导到光源或另一波导的对准，其中在波长上平均化了模式间干扰。 将模式强度分布的叠加装配到输出光束的波长平均强度分布中提供关于输出光束的模态组成的信息，其可以用于评估多模波导相对于输入光束的对准，以及 以提供用于引导波导对准过程的反馈。

公开(公告)号：US09244274B2

公开(公告)日：2016-01-26

申请号：US14100565

申请日：2013-12-09

Applicant: Lumentum Operations LLC

Inventor： Xiuquan Ma ,  Dmitriy Panasenko ,  Martin H. Muendel

IPC: G02B3/00 ,  G02B27/30 ,  G02B27/00

CPC classification number: G02B27/0025 ,  G02B3/0087 ,  G02B6/25 ,  G02B6/255 ,  G02B13/0095 ,  G02B27/30

Abstract: An aberration corrector and a method to reducing a spherical aberration are disclosed. The aberration corrector has a radial, rotationally symmetric variation of refractive index including a term varying in proportion to a fourth degree of a distance from the optical axis. Since the spherical aberration causes a wavefront deviation proportional to the fourth degree of distance from the optical axis, the spherical aberration can be reduced by the aberration corrector when its thickness causes the exact amount of the phase delay corresponding to the wavefront deviation, but with an opposite sign.

Abstract translation: 公开了一种像差校正器和减小球面像差的方法。 像差校正器具有径向，旋转对称的折射率变化，包括与距离光轴的距离的第四度成比例地变化的项。 由于球面像差引起与第四距离光轴成比例的波前偏移，所以当像差校正器的厚度导致与波前偏差相对应的精确量的相位延迟时，可以减小球面像差， 相反的标志。

公开(公告)号：US09703099B2

公开(公告)日：2017-07-11

申请号：US15003514

申请日：2016-01-21

Applicant: Lumentum Operations LLC

Inventor： Xiuquan Ma ,  Dmitriy Panasenko ,  Martin H. Muendel

IPC: G02B3/00 ,  G02F1/01 ,  G02B27/00 ,  G02B6/25 ,  G02B6/255 ,  G02B13/00 ,  G02B27/30

CPC classification number: G02B27/0025 ,  G02B3/0087 ,  G02B6/25 ,  G02B6/255 ,  G02B13/0095 ,  G02B27/30

Abstract: An aberration corrector and a method to reducing a spherical aberration are disclosed. The aberration corrector has a radial, rotationally symmetric variation of refractive index including a term varying in proportion to a fourth degree of a distance from the optical axis. Since the spherical aberration causes a wavefront deviation proportional to the fourth degree of distance from the optical axis, the spherical aberration can be reduced by the aberration corrector when its thickness causes the exact amount of the phase delay corresponding to the wavefront deviation, but with an opposite sign.

公开(公告)号：US20160231564A1

公开(公告)日：2016-08-11

申请号：US15003514

申请日：2016-01-21

Applicant: Lumentum Operations LLC

Inventor： Xiuquan Ma ,  Dmitriy Panasenko ,  Martin H. Muendel

IPC: G02B27/00 ,  G02B6/255 ,  G02B13/00 ,  G02B6/25 ,  G02B27/30 ,  G02B3/00

CPC classification number: G02B27/0025 ,  G02B3/0087 ,  G02B6/25 ,  G02B6/255 ,  G02B13/0095 ,  G02B27/30

Abstract: An aberration corrector and a method to reducing a spherical aberration are disclosed. The aberration corrector has a radial, rotationally symmetric variation of refractive index including a term varying in proportion to a fourth degree of a distance from the optical axis. Since the spherical aberration causes a wavefront deviation proportional to the fourth degree of distance from the optical axis, the spherical aberration can be reduced by the aberration corrector when its thickness causes the exact amount of the phase delay corresponding to the wavefront deviation, but with an opposite sign.

公开(公告)号：US09397464B2

公开(公告)日：2016-07-19

申请号：US14576335

申请日：2014-12-19

Applicant: Lumentum Operations LLC

Inventor： Martin H. Muendel ,  Xiuquan Ma ,  Kai-Hsiu Liao ,  Matthew Kutsuris

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/091 ,  H01S3/08 ,  H01S3/10

CPC classification number: H01S3/06708 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/08018 ,  H01S3/08022 ,  H01S3/0804 ,  H01S3/091 ,  H01S3/094007 ,  H01S3/094061 ,  H01S3/09415 ,  H01S3/10 ,  H01S3/10023 ,  H01S3/1618

Abstract: A modal instability of a fiber amplifier may be reduced by coupling, e.g. splicing, a length of passive multimode optical fiber to an active multimode optical fiber of the fiber amplifier. Upon launching light into the passive optical fiber, some higher order transversal modes may be excited in the passive optical fiber. The higher-order modes may interfere with the fundamental mode in the passive multimode optical fiber. However, the intermodal interference of the launched modes does not cause thermal gradients in the passive optical fiber. Upon propagation in the passive multimode optical fiber, the excited optical modes may lose mutual coherence, causing a reduction of contrast of the intermodal interference pattern along the doped core of the active optical fiber, effectively reducing modal instability in the active optical fiber.

Abstract translation: 光纤放大器的模态不稳定性可以通过耦合，例如， 将一段长度的无源多模光纤连接到光纤放大器的有源多模光纤。 在将光发射到无源光纤中时，可以在无源光纤中激发一些较高阶的横向模式。 高阶模式可能会干扰无源多模光纤中的基本模式。 然而，发射模式的联合干扰不会导致无源光纤中的热梯度。 在无源多模光纤中传播时，激发的光学模式可能失去相互相干性，导致沿着有源光纤的掺杂核心的多模式干涉图案的对比度降低，有效地降低了有源光纤中的模态不稳定性。

公开(公告)号：US09391425B2

公开(公告)日：2016-07-12

申请号：US14884440

申请日：2015-10-15

Applicant: Lumentum Operations LLC

Inventor： Martin H. Muendel ,  Xiuquan Ma

IPC: H01S3/10 ,  H01S3/23 ,  H01S3/08 ,  H01S3/081

CPC classification number: H01S3/2391 ,  H01S3/08036 ,  H01S3/0805 ,  H01S3/08063 ,  H01S3/0811 ,  H01S5/141 ,  H01S5/4062 ,  H01S5/4068 ,  H01S5/4087

Abstract: A beam combiner may include source elements, each configured to output a beam of light locked at a center wavelength different from center wavelengths of other source elements. The beam combiner may include a dispersive element configured to combine the beams of light into a combined beam, and a beam separator configured to separate the combined beam into an output beam and a locking beam. The beam combiner may include a spatial filter configured to prevent crosstalk within the locking beam, and to redirect the locking beam to the source elements. The dispersive element may be configured to disperse the locking beam into constituent wavelength beams. Each constituent wavelength beam may be directed to a respective one of the source elements for locking that source element at its center wavelength, and may correspond in wavelength to the center wavelength of the respective source element.

Abstract translation: 光束组合器可以包括源元件，每个源元件被配置为输出锁定在不同于其它源元件的中心波长的中心波长的光束。 光束组合器可以包括被配置为将光束组合成组合光束的分散元件，以及被配置为将组合光束分离成输出光束和锁定光束的光束分离器。 光束组合器可以包括被配置为防止锁定光束内的串扰并且将锁定光束重定向到源元件的空间滤光器。 分散元件可以被配置为将锁定光束分散成组成的波长束。 每个构成波长光束可以被引导到源元件中的相应一个，用于将该源元件锁定在其中心波长处，并且可以在波长对应于相应源元件的中心波长。