公开(公告)号：US20240339807A1

公开(公告)日：2024-10-10

申请号：US18748195

申请日：2024-06-20

Applicant: II-VI Delaware, Inc.

Inventor： Aravanan Gurusami ,  Deepak Devicharan ,  Timothy K. Zahnley ,  Martin R. Williams

IPC: H01S3/13 ,  H01S3/094 ,  H01S3/10 ,  H04B10/077

CPC classification number: H01S3/13013 ,  H01S3/094003 ,  H01S3/10015 ,  H04B10/0777 ,  H01S2301/04

Abstract: A system for communicating supervisory information between amplifier nodes in an optical communication network utilizes modulation of an included pump source to superimpose the supervisory information on data signals (typically customer data signals) propagating between the amplifier nodes transmitted customer signals. The modulated pump appears as a modulated envelope on the amplified data signal exiting the amplifier node, and may be recovered by suitable demodulation components located at the second node (i.e., the destined receiver of the supervisory information). The supervisory information may include monitoring messages, provisioning data, protocol updates, etc., and is utilized as an input to an included modulator, which then forms a drive signal for the pump controller.

公开(公告)号：US12095220B2

公开(公告)日：2024-09-17

申请号：US17251684

申请日：2019-06-12

Applicant: Fujikura Ltd.

Inventor： Yukihiko Takahashi

IPC: H01S5/024 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/0239

CPC classification number: H01S3/09415 ,  H01S3/06733 ,  H01S3/0675 ,  H01S3/094003 ,  H01S3/094053 ,  H01S5/0239

Abstract: An optical module unit includes: optical modules each including light emitting elements; and a mount on which the light emitting elements are disposed on one side of the mount, and includes a sub-passage; and a manifold to which the optical modules are fixed. The manifold includes a first main passage to which a first end of each of the sub-passages is connected in parallel.

公开(公告)号：US20240275120A1

公开(公告)日：2024-08-15

申请号：US18197519

申请日：2023-05-15

Applicant: TIANJIN UNIVERSITY

Inventor： Wei SHI ,  Lu ZHANG ,  Shijie FU ,  Quan SHENG ,  Junxiang ZHANG ,  Jianquan YAO

IPC: H01S3/08 ,  H01S3/067 ,  H01S3/094 ,  H01S3/16

CPC classification number: H01S3/0809 ,  H01S3/06716 ,  H01S3/06733 ,  H01S3/0675 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/094053 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/1618 ,  H01S2302/00 ,  H01S2303/00

Abstract: The present disclosure discloses a 2.8 μm and 3.5 μm dual-wavelength mid-infrared fiber laser, which employs “0.98 μm+1.15 μm” pumping scheme, uses a fiber combiner to combine two pump lights into the double cladding Er-doped fluoride fiber. The Er ions in the ground state are first promoted to 4I11/2 level by the 0.98 μm pump light, realizing 2.8 μm lasing based on 4I11/2→4I13/2 transition, and further promoted to 4F9/2 level by the 1.15 μm pump light, generating 3.5 μm lasing based on 4F9/2→4I9/2 transition; followed by the 3.5 μm laser transition, the Er ions would rapidly decay to 4I11/2 level via non radiative transition, realizing the re-population of 4I11/2 level, effectively enlarge the population inversion of 2.8 μm transition, suppressing the self-termination of 2.8 μm lasing and achieving 2.8 μm and 3.5 μm dual-wavelength cascaded lasing output.

公开(公告)号：US12046865B2

公开(公告)日：2024-07-23

申请号：US17171009

申请日：2021-02-09

Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION

Inventor： Gregory Goodno

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

CPC classification number: H01S3/06754 ,  H01S3/0675 ,  H01S3/094003 ,  H01S3/2308

Abstract: A fiber laser amplifier system including a non-linear fiber amplifier receiving a seed beam and a pump beam, where the amplifier amplifies the seed beam using the pump beam to provide an output beam having a carrier spectrum. A beam sampler samples off a sample beam from the output beam, a filter receives the sample beam and filters out the carrier spectrum from the sample beam, a photodetector detects beam power of the filtered sample beam and provides a beam power signal, and a controller receives the beam power signal, where the controller controls one or more of an FM drive signal, an AM drive signal and a pump beam to change seed beam FM modulation, seed beam AM modulation and/or pump power in a manner that reduces the beam power of the filtered sample beam and thus beam power outside of the carrier spectrum.

公开(公告)号：USRE50026E1

公开(公告)日：2024-06-25

申请号：US16741186

申请日：2020-01-13

Applicant: NKT Photonics A/S

Inventor： Paulo Almeida ,  John Redvers Clowes ,  Pascal Dupriez ,  Anatoly Borisovich Grudinin

IPC: H01S3/10 ,  H01S3/067 ,  H01S3/1112 ,  H01S3/13 ,  H01S3/00 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/06754 ,  H01S3/1112 ,  H01S3/0057 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/2383 ,  H01S2301/08

Abstract: A method of tuning the time duration of laser output pulses, the method including spectrally dispersing optical pulses and further comprising providing an optical pulse having a time duration and a spectral bandwidth; spectrally dispersing (243, 245) the optical pulse so as to provide a selected change in the time duration of the pulse responsive to the spectral bandwidth of the pulse; outputting (226) an optical output pulse having a first time duration that is responsive to the selected change in time duration; providing another optical pulse; changing the amount of spectral bandwidth of the another optical pulse (272) to be different than that of the optical pulse or changing the amount of spectral dispersion so that spectrally dispersing the another optical pulse provides a change in time duration that is different than the selected change; and outputting (226) another optical output pulse having a second time duration that is responsive to the different change in time duration, the second time duration of the another optical output pulse being different than the first time duration of the optical output pulse.

公开(公告)号：US20240204472A1

公开(公告)日：2024-06-20

申请号：US18590040

申请日：2024-02-28

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Tatsuya YOSHIZAKI ,  Masaya NAKAZUMI ,  Naoki HAYAMIZU ,  Yuta ISHIGE

IPC: H01S3/094 ,  H01S3/04

CPC classification number: H01S3/094049 ,  H01S3/0407 ,  H01S3/094003

Abstract: An optical device includes: a base; a light emitting device arranged on the base and configured to output a laser beam; a plurality of optical parts arranged on the base and configured to transmit the laser beam output from the light emitting device to an optical fiber to couple with the optical fiber, the plurality of optical parts including a first optical part and a second optical part; and a shielding portion arranged on the base and configured to shield stray light reflected on the second optical part so as to avoid the stray light from being irradiated to the first optical part.

公开(公告)号：US11949205B2

公开(公告)日：2024-04-02

申请号：US18151750

申请日：2023-01-09

Applicant: II-VI Delaware, Inc.

Inventor： Martin R. Williams

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10

CPC classification number: H01S3/06787 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/10015 ,  H01S3/06754 ,  H01S3/06762 ,  H01S2301/04

Abstract: The present disclosure generally relates optical amplifier modules. In one form for example, an optical amplifier module includes a booster optical amplifier configured to increase optical power of a first optical signal. The module also includes a preamp optical amplifier configured to increase optical power of a second optical signal and a pump laser optically coupled to the booster optical amplifier and the preamp optical amplifier. The pump laser is configured to provide a booster power to the booster optical amplifier and a preamp power to the preamp optical amplifier, the preamp power is effective to induce a gain in optical power to provide a target optical power of the second optical signal from the preamp optical amplifier, and the booster power is dependent on the preamp power.

公开(公告)号：US20240097395A1

公开(公告)日：2024-03-21

申请号：US18519189

申请日：2023-11-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yehui LIU ,  Shiyi CAO ,  Jinyan LI ,  Yingbo CHU

IPC: H01S3/067 ,  C03B37/012 ,  H01S3/094

CPC classification number: H01S3/06716 ,  C03B37/01262 ,  H01S3/094003 ,  C03B2201/34 ,  C03B2203/16 ,  H01S2301/02

Abstract: The technology of this application relates to an erbium-doped fiber. The erbium-doped fiber can be used in the fields of amplifiers, optical communications, rare-earth-doped fiber preparation, and the like. A fiber core of the erbium-doped fiber includes a first layer and a second layer from inside to outside. The first layer includes a center of the fiber core. The second layer is an annulus, and an outer ring of the annulus is an outer ring of the fiber core. An average doping concentration of erbium ions of the first layer is higher than an average doping concentration of erbium ions of the second layer. An ASE can be reduced by reducing a doping concentration of erbium ions of the second layer, to further reduce a noise figure of the erbium-doped fiber and improve communications quality.

公开(公告)号：US11870210B2

公开(公告)日：2024-01-09

申请号：US15734648

申请日：2018-10-16

Applicant: South China University of Technology

Inventor： Jiulin Gan ,  Xiaobo Heng ,  Zhongmin Yang ,  Zhishen Zhang

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/0804 ,  H01S3/094 ,  H01S3/10 ,  H01S3/08 ,  H01S3/0941

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/0804 ,  H01S3/094003 ,  H01S3/1001 ,  H01S3/1003 ,  H01S3/08013 ,  H01S3/09415 ,  H01S3/094065 ,  H01S3/10061

Abstract: The present invention discloses a transverse mode switchable all-fiber high-order mode Brillouin laser. The laser comprises a narrow linewidth pump laser, an optical amplifier, a 1×N optical switch (N≥2), a fiber mode selection coupler group, a first polarization controller, a fiber circulator, a fiber coupler, a second polarization controller, and a few-mode fiber. Based on the Brillouin nonlinear gain of a few-mode fiber in a ring cavity, the present invention realizes the resonance amplification of a specific order transverse mode in the cavity, and obtains the transverse mode switchable high-order mode laser beam output. The present invention, adopting an all-fiber structure, has the advantages of simple structure, low cost, easy fiber system integration, high stability and narrow linewidth of outputted laser beams, etc., and improves the practicality and reliability of high-order mode lasers.

公开(公告)号：US11843218B2

公开(公告)日：2023-12-12

申请号：US17825606

申请日：2022-05-26

Applicant: FYLA LASER, S. L.

Inventor： Pere Pérez Millán ,  Javier Abreu Afonso ,  Salvador Torres Peiró ,  Viorel Otgon ,  Héctor Muñoz Marco

IPC: H01S3/1118 ,  H01S3/067 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/00 ,  H01S3/094

CPC classification number: H01S3/1118 ,  H01S3/0064 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/09415 ,  H01S3/094003 ,  H01S3/1608 ,  H01S3/1618 ,  H01S2301/085

Abstract: A fiber laser system based in solitonic passive mode-locking, including a laser diode to emit and deliver an optical signal of a first wavelength; a single-fiber laser cavity including a dichroic mirror, a SESAM and a polarization maintaining highly-doped active fiber, to receive the emitted signal and to emit a pulsed optical signal of a second wavelength, generating laser light in the form of mode-locked ultrashort pulses; a unit coupling the laser diode to the single-fiber laser cavity; and an isolator device protecting the cavity from back reflections. The solitonic mode-locked ultrashort pulses are comprised in a range of 100 fs