公开(公告)号：US20240266796A1

公开(公告)日：2024-08-08

申请号：US18574292

申请日：2022-06-22

Applicant: B.G.NEGEV TECHNOLOGIES AND APPLICATIONS LTD.,AT BEN-GURION UNIVERSITY

Inventor： Amiel Ishaaya ,  Yakov Greenberg

IPC: H01S3/067 ,  H01S3/10

CPC classification number: H01S3/06737 ,  G02B6/02042 ,  H01S3/06733

Abstract: A super-mode selective optical unit that may include (i) a multicore fiber (MCF) that comprises one or more claddings, and multiple doped fiber cores located within one of the one or more claddings; and (ii) a multimode fiber (MMF) that comprises a first MMF end and a second MMF end; wherein the first MMF end is configured to receive optical signals from the MCF; wherein the MMF is configured to attenuate in-phase super-mode components of the optical signals of the MCF and to amplify out-of-phase components of the optical signals.

公开(公告)号：US20240243539A1

公开(公告)日：2024-07-18

申请号：US18097577

申请日：2023-01-17

Applicant: II-VI Delaware, Inc.

Inventor： Ian McClean

IPC: H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/16

CPC classification number: H01S3/06737 ,  H01S3/094003 ,  H01S3/094069 ,  H01S3/0941 ,  H01S3/10015 ,  H01S3/1608

Abstract: Systems and methods are provided for short fiber length multi-core fiber (MCF) Erbium-doped fiber amplifiers (EDFAs). An enhanced Erbium-doped fiber amplifier (EDFA) includes one or more pumps configured to pump light during the amplifying, and a multiple-core fiber (MCF) doped with an active dopant for communicating the signal light within the EDFA during the amplifying. The multiple-core fiber (MCF) is in optical communication with the signal light and is in optical communication with the one or more pumps, where the amplifying included applying a plurality of gain sections, with each gain section associated with a corresponding fiber length, and where applying one or more of the plurality of gain sections including use of one or more loops via one or more corresponding cores in the multiple-core fiber (MCF). The multiple-core fiber (MCF) is an Erbium-doped fiber (EDF).

公开(公告)号：US11955764B2

公开(公告)日：2024-04-09

申请号：US16980478

申请日：2018-08-27

Applicant: HUAWEI MARINE NETWORKS CO., LTD.

Inventor： Changwu Xu ,  Yuhe Li ,  Ge Jin ,  Yan Wang ,  Liping Ma

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H04B10/291 ,  H04B10/293

CPC classification number: H01S3/06754 ,  H01S3/06716 ,  H01S3/06737 ,  H01S3/094053 ,  H01S3/094061 ,  H01S3/09408 ,  H04B10/2912 ,  H04B10/293

Abstract: Disclosed is a submarine network device, comprising a fiber set, a pump laser set, an erbium doped fiber amplifier (EDFA) set, a primary fiber coupler (CPL) set and a secondary CPL set, wherein the primary CPL set comprises N primary CPLs, the secondary CPL set comprises N secondary CPLs, with N being an integer greater than or equal to 3. The fiber set is configured to connect the pump laser set, the primary CPL set, the secondary CPL set and the EDFA set. An input port of each primary CPL in the primary CPL set is at least connected with a pump laser. An output port of each secondary CPL in the secondary CPL set is at least connected with an EDFA. Output ports of each primary CPL in the primary CPL set are respectively connected with two different secondary CPLs that are spaced by a secondary CPL, and input ports of each secondary CPL in the secondary CPL set are respectively connected with two different primary CPLs that are spaced by a primary CPL.

公开(公告)号：US11870208B2

公开(公告)日：2024-01-09

申请号：US16976162

申请日：2019-03-06

Applicant: NEC Corporation

Inventor： Keiichi Matsumoto ,  Emmanuel Le Taillandier De Gabory ,  Shigeyuki Yanagimachi

IPC: H01S3/091 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941

CPC classification number: H01S3/0912 ,  H01S3/06754 ,  H01S3/0941 ,  H01S3/094007 ,  H01S3/094015 ,  H01S3/06737

Abstract: Provided are a low-cost and low power-consumption optical fiber amplifier, an optical fiber amplifier control method, and a transmission system. The optical fiber amplifier comprises: an optical fiber to which pumping light is supplied and which amplifies an optical signal, the optical fiber including a plurality of cores in a cladding; a light source which outputs the pumping light; a combining means which supplies the pumping light from the light source to the cladding of the optical fiber and causes the pumping light to be combined with the optical signal; a collect means which collects, without collecting the signal light, pumping light among the supplied pumping light that has not been absorbed by the optical fiber; a monitor means which monitors residual pumping light that has passed through the optical fiber and collected by the collect means; and a control means which controls the state of the pumping light.

公开(公告)号：US20190190224A1

公开(公告)日：2019-06-20

申请号：US16218065

申请日：2018-12-12

Applicant: IMRA America, Inc.

Inventor： Kevin F. Lee ,  Martin E. Fermann

IPC: H01S3/067 ,  H01S3/23 ,  H01S3/00 ,  H01S3/08 ,  H01S3/094

CPC classification number: H01S3/06712 ,  H01S3/0085 ,  H01S3/06737 ,  H01S3/08059 ,  H01S3/094019 ,  H01S3/2383

Abstract: In an example amplifier system, an input pulse train is passed through an optical stage that splits each pulse into two or more pulses. These divided pulses are then injected into at least two amplifiers for amplification. The amplified pulses are subsequently passed back through the same optical stage in order to combine the pulses back into one high energy pulse. The amplifier system can use time division multiplexing (TDM) and/or spatial division multiplexing (SDM) to produce, e.g., four pulses in conjunction with two amplifiers and propagation through two optical beam splitters, which are coherently combined into a single output pulse after amplification. The amplifiers can comprise fiber amplifiers or bulk amplifiers.

公开(公告)号：US20180115134A1

公开(公告)日：2018-04-26

申请号：US15568876

申请日：2016-04-22

Applicant: Universite de Limoges ,  Centre National de La Recherche Scientifique

Inventor： Vincent Roy ,  Romain Dauliat ,  Raphael Emmanuel Jamier

IPC: H01S3/067 ,  H01S3/102

CPC classification number: H01S3/06733 ,  H01S3/06729 ,  H01S3/06737 ,  H01S3/1028

Abstract: A monomode optical fiber, and a process for manufacturing such a fiber, that comprises a monomode core and at least one cladding encircling the core. The monomode core comprises at least two zones, a first zone with at least one first refractive index and a second zone with at least one second refractive index different from the first refractive index. The difference between the first refractive index and the second refractive index is of the same order of magnitude as the variation in the refractive index of the second zone between the inactive state and the active state of the fiber.

公开(公告)号：US09537282B2

公开(公告)日：2017-01-03

申请号：US14145199

申请日：2013-12-31

Applicant: Alcatel-Lucent USA Inc.

Inventor： Nicolas K. Fontaine ,  Roland Ryf ,  David Neilson

IPC: G02B6/25 ,  H01S3/067 ,  H01S3/094 ,  G02B6/14 ,  G02B6/02 ,  G02B6/255 ,  H01S3/30

CPC classification number: H01S3/094065 ,  G02B6/02042 ,  G02B6/14 ,  G02B6/2552 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094057 ,  H01S3/094069 ,  H01S3/302

Abstract: An optical amplifier includes a multi-mode pump laser module, a multi-mode waveguide, a multi-mode to multiple single-mode fiber converter module and a plurality of single-mode cores. The multi-mode pump laser module emits pump light having a plurality of modes to the multi-mode fiber or waveguide. The multi-mode waveguide propagates the emitted pump light to the converter module. The converter module receives the pump light and distributes the pump light approximately uniformly to a plurality of single-mode cores.

Abstract translation: 光放大器包括多模泵浦激光器模块，多模波导，多模到多单模光纤转换器模块和多个单模核。 多模式泵浦激光器模块向多模光纤或波导发射具有多种模式的泵浦光。 多模波导将发射的泵浦光传播到转换器模块。 转换器模块接收泵浦光并将泵浦光大致均匀地分配到多个单模核心。

公开(公告)号：US20160352063A1

公开(公告)日：2016-12-01

申请号：US15235239

申请日：2016-08-12

Applicant: IMRA AMERICA, INC.

Inventor： Martin E. Fermann

IPC: H01S3/067 ,  H01S3/11 ,  H01S3/08 ,  H01S3/094

CPC classification number: H01S3/06708 ,  G02B6/26 ,  H01S3/0092 ,  H01S3/067 ,  H01S3/06704 ,  H01S3/06712 ,  H01S3/06716 ,  H01S3/06725 ,  H01S3/06729 ,  H01S3/06733 ,  H01S3/06737 ,  H01S3/06745 ,  H01S3/06783 ,  H01S3/08045 ,  H01S3/08054 ,  H01S3/094007 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/094069 ,  H01S3/1106 ,  H01S3/1109 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/1608 ,  H01S3/1618

Abstract: A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber. The probability of damage of the absorber may be minimized by the insertion of an additional semiconductor optical power limiter into the cavity.

公开(公告)号：US09435942B2

公开(公告)日：2016-09-06

申请号：US14405306

申请日：2013-06-21

Applicant: OFS FITEL, LLC

Inventor： Paul S Westbrook

IPC: G02B6/02 ,  H01S3/067

CPC classification number: G02B6/02042 ,  H01S3/06708 ,  H01S3/06737 ,  H01S3/0675 ,  Y10T29/49

Abstract: A method of designing multicore optical fibers is provided. A geometry for the core arrangement is selected. At least one of i) core width, ii) core position with respect to other cores, or iii) orientation with respect to incoming, outgoing, or at least partially traversing radiation such as an inscription beam are optimized. A design space is created in which no core shadows or blocks any other core with respect to incoming, outgoing, or at least partially traversing radiation. Optimization generally includes tracing tangents of core widths against an orthogonal axis and ensuring no overlap of space between said tangents on said axis. For twisted fiber, optimization also includes optimizing effective length and twist rate of the fiber. Devices entailing such fibers, such as multicore pump coupler and multicore fiber distributed feedback laser, are also contemplated.

Abstract translation: 提供了一种设计多芯光纤的方法。 选择核心布置的几何形状。 i）芯宽度中的至少一个，ii）相对于其它芯的芯位置，或iii）相对于诸如刻录光束的进入，输出或至少部分穿透辐射的取向被优化。 创建一个设计空间，其中相对于进入，输出或至少部分穿透辐射，没有核心阴影或阻挡任何其他核心。 优化通常包括相对于正交轴线的芯宽度的跟踪切线，并且确保所述轴上的所述切线之间的空间不重叠。 对于扭曲纤维，优化还包括优化纤维的有效长度和捻度。 也考虑了诸如多芯泵耦合器和多芯光纤分布反馈激光器的这种光纤的装置。

公开(公告)号：US09423559B2

公开(公告)日：2016-08-23

申请号：US14106338

申请日：2013-12-13

Applicant: Furukawa Electric Co., Ltd.

Inventor： Yukihiro Tsuchida ,  Yu Mimura

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028 ,  G02B6/032 ,  H01S3/067

CPC classification number: G02B6/02042 ,  G02B6/0285 ,  G02B6/032 ,  G02B6/03622 ,  H01S3/06725 ,  H01S3/06729 ,  H01S3/06733 ,  H01S3/06737 ,  H01S3/06741 ,  H01S3/06754

Abstract: A multi-core amplification optical fiber includes: a plurality of core portions doped with a rare-earth element; an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed; and an outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion.

Abstract translation: 多核放大光纤包括：掺杂有稀土元素的多个芯部; 位于所述多个芯部的周围的折射率低于形成有第一孔的所述多个芯部的折射率的内包层部; 以及外包层，其位于所述内包层部的周围，折射率低于所述内包层部的折射率。