公开(公告)号：US20240036255A1

公开(公告)日：2024-02-01

申请号：US17936114

申请日：2022-09-28

Applicant: Lumentum Operations LLC

Inventor： Ning LIU ,  Jeff GREGG ,  Gongwen ZHU ,  Xiang PENG ,  Guan SUN ,  Matthew KUTSURIS

IPC: G02B6/255 ,  H01S3/094 ,  G02B6/04

CPC classification number: G02B6/2552 ,  H01S3/094053 ,  G02B6/04

Abstract: A system may perform an uptapering process to cause a signal fiber to have a fiber core with a first uptapered thickness profile and a fiber cladding with a second uptapered thickness profile. The system may perform, after performing the uptapering process, an uptapering removal process to cause the fiber cladding of the signal fiber to not have the second uptapered thickness profile. The system may perform, after performing the uptapering removal process, a bundling process to bundle the signal fiber and a set of one or more pump fibers in a bundle configuration. The system may perform, after performing the bundling process, a bundle unification process to cause the bundle configuration to form a unified bundle configuration. The system may perform, after performing the bundle unification process, an attachment process to cause an end of the unified bundle configuration to attach to an end of an output fiber.

公开(公告)号：US20160181756A1

公开(公告)日：2016-06-23

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: H01S3/067 ,  H01S3/091

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：US20240347997A1

公开(公告)日：2024-10-17

申请号：US18330656

申请日：2023-06-07

Applicant: Lumentum Operations LLC

Inventor： Ning LIU ,  Guan SUN ,  Matthew KUTSURIS ,  Gongwen ZHU

IPC: H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/06733 ,  H01S3/0675 ,  H01S3/094007 ,  H01S3/1603 ,  H01S3/2308

Abstract: A master oscillator power amplifier system includes a seed laser oscillator and a master laser oscillator. The seed laser oscillator includes a first oscillator fiber with a first laser cavity configured to convert a first pump light into a first seed laser light in a fundamental mode as the first pump light interacts with a fiber core of the first oscillator fiber. The master laser oscillator includes a second oscillator fiber with second laser cavity configured to receive and convert the first seed laser light into a second seed laser light in the fundamental mode as the first seed laser light interacts with a fiber core of the second oscillator fiber, and receive and convert a second pump light into a primary laser light in the fundamental mode as the second pump light interacts with the fiber core of the second oscillator fiber.

公开(公告)号：US20240250493A1

公开(公告)日：2024-07-25

申请号：US18193195

申请日：2023-03-30

Applicant: Lumentum Operations LLC

Inventor： Gongwen ZHU ,  Matthew KUTSURIS ,  Guan SUN ,  Ning LIU

IPC: H01S3/094 ,  G02B6/42 ,  H01S3/0941 ,  H01S3/23

CPC classification number: H01S3/094053 ,  G02B6/4202 ,  G02B6/4262 ,  H01S3/094007 ,  H01S3/094011 ,  H01S3/09415 ,  H01S3/2308 ,  H01S3/067

Abstract: In some implementations, a pump-signal combiner may comprise a plurality of pump fibers configured to receive pump light and to transmit the pump light into a cladding of an output fiber and one or more signal fibers, surrounded by the plurality of pump fibers. In some implementations, the one or more signal fibers may each comprise an input section, coupled to the one or more first laser sources, having an input core diameter; an output section, coupled to the output fiber, having an output core diameter; a first tapered section, adjacent to the input section, in which a core diameter increases from the input core diameter to a maximum value; and a second tapered section, adjacent to the output section, in which a core diameter decreases from the maximum value to the output core diameter.