WO2005052640B1 - Optical fiber pump multiplexer - Google Patents
Optical fiber pump multiplexerInfo
- Publication number
- WO2005052640B1 WO2005052640B1 PCT/US2004/035514 US2004035514W WO2005052640B1 WO 2005052640 B1 WO2005052640 B1 WO 2005052640B1 US 2004035514 W US2004035514 W US 2004035514W WO 2005052640 B1 WO2005052640 B1 WO 2005052640B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- optical fiber
- bundle
- optical
- multimode
- Prior art date
Links
- 239000003365 glass fiber Substances 0.000 title claims 32
- 239000000835 fiber Substances 0.000 claims abstract 63
- 238000005253 cladding Methods 0.000 claims abstract 15
- 238000005086 pumping Methods 0.000 claims abstract 2
- 210000001736 Capillaries Anatomy 0.000 claims 5
- 230000003287 optical Effects 0.000 claims 4
- 230000001808 coupling Effects 0.000 claims 3
- 238000010168 coupling process Methods 0.000 claims 3
- 238000005859 coupling reaction Methods 0.000 claims 3
- 210000003666 Nerve Fibers, Myelinated Anatomy 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- -1 rare earth ions Chemical class 0.000 claims 1
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Abstract
One or more single mode few-moded or multimode fibers are incorporated into a bundle to carry input to a fiber amplifier or output from a fiber amplifier or a fiber laser. The input is at the signal wavelength, which is the wavelength where amplification or lasing occurs. Each of the fibers in the bundle is cleaved individually or as a group and fiber ends are aligned in the same plane. The fiber amplifier or fiber laser may include a double clad fiber and the other fibers of the bundle couple light for cladding pumping. The device may also include a mode filter for controlling the output mode.
Claims
1. An optical fiber assembly, comprising: a fiber bundle having an outer diameter; and a first optical fiber having an outer diameter that is at least equal to the outer diameter of the fiber bundle, said first optical fiber having a cladding and a core, and at least a first fiber of said fiber bundle having a core, wherein the fiber bundle is spliced to the first optical fiber such that said cores are optically coupled, and such that optical power in others of the fibers of said fiber bundle is coupled into said cladding, said first optical fiber being tapered at a location apart from said splice.
2. The optical fiber assembly according to claim 1, wherein the fiber bundle comprises at least one of (1) multimode pump fiber pigtails; and (2) one or more single mode, few moded or multimode fibers carrying light at a signal wavelength.
3. The optical fiber assembly according to claim 1, wherein the fiber bundle comprises a plurality of fibers arranged about a central fiber, and the central fiber is one of a single mode fiber, a few-moded fiber and a multimode fiber.
4. The optical fiber assembly according to claim 1, wherein the fiber bundle comprises a plurality of fibers arranged about a central fiber, and the plurality of fibers are arranged in a predetermined pattern around the central fiber.
5. The optical fiber assembly according to claim 4, wherein a holder maintains the fiber bundle in a hexagonal arrangement.
6. The optical fiber assembly according to claim 4, further comprising a plurality of filler fibers that maintains the fiber bundle in said predetermined pattern.
22
7. The optical fiber assembly according to claim 1, further comprising a capillary that maintains the fiber bundle in a predetermined arrangement.
8. The optical fiber assembly according to claim 7, wherein the capillary has a lower refractive index than the cladding of the fibers in the fiber bundle.
9. The optical fiber assembly according to claim 1, wherein the first optical fiber has one of a single mode core, a few-moded core, and a multimode core; and wherein the first optical fiber is a double clad fiber.
10. The optical fiber assembly according to claim 1, wherein the first optical fiber is a double clad fiber with said core doped with rare earth ions.
11. (cancelled)
12. The optical fiber assembly according to claim 1, further comprising a second optical fiber, wherein the taper is sized so the first optical fiber can be spliced to the second optical fiber.
13. The optical fiber assembly according to claim 12, wherein the second optical fiber has one of a single mode, few moded and multimode core.
14. A cladding pumped optical fiber device comprising: a cladding pumped fiber; a plurality of optical sources for optically pumping the cladding pumped fiber; a plurality of multimode fibers optically coupling the optical sources to the cladding pumped fiber, each multimode fiber having a first end coupled to one of the plurality of optical sources and a second end coupled to the cladding pumped fiber for coupling multimode light into a cladding of the cladding pumped fiber; and a multimode core fiber coupled to the cladding pumped fiber for coupling single mode light into the core of the cladding pumped fiber, wherein the plurality of multimode fibers and the multimode core fiber are bundled together into a fiber bundle, and the fiber bundle being tapered to a reduced cross sectional area prior to being coupled to the cladding pumped fiber.
15. The cladding pumped optical fiber device according to claim 14, wherein the taper of the fiber bundle acts as a mode-filter used to propagate single mode light in the multimode core fiber.
16. A method of producing an optical fiber assembly, comprising: providing a fiber bundle having an outer diameter; and splicing a first optical fiber to said fiber bundle; wherein said first optical fiber has an outer diameter which is at least equal to the outer diameter of said fiber bundle, wherein the fiber bundle is first fused at one location and then cleaved at the fused location to form fiber bundle ends for splicing, and tapering said first optical fiber at a location apart from the splice.
24
17. (cancelled)
18. 'The method claimed in claim 16, wherein said splicing step is carried out by a fusion arc.
19. The method claimed in claim 16, wherein said splicing step is carried out using resistance heating.
20. The method claimed in claim 18, further including the step of providing a capillary surrounding said fiber bundle and said first optical fiber, providing arc-entrance apertures in said capillary, and fusing said capillary to said fiber bundle and said first optical fiber during said splicing.
25
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112004002202.9T DE112004002202B4 (en) | 2003-11-13 | 2004-11-08 | Optical fiber pumping multiplexer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/705,817 | 2003-11-13 | ||
| US10/705,817 US7016573B2 (en) | 2003-11-13 | 2003-11-13 | Optical fiber pump multiplexer |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2005052640A2 WO2005052640A2 (en) | 2005-06-09 |
| WO2005052640A3 WO2005052640A3 (en) | 2005-12-29 |
| WO2005052640B1 true WO2005052640B1 (en) | 2006-03-16 |
Family
ID=34573349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2004/035514 WO2005052640A2 (en) | 2003-11-13 | 2004-11-08 | Optical fiber pump multiplexer |
Country Status (3)
| Country | Link |
|---|---|
| US (3) | US7016573B2 (en) |
| DE (1) | DE112004002202B4 (en) |
| WO (1) | WO2005052640A2 (en) |
Families Citing this family (81)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1175714B1 (en) * | 1999-04-30 | 2009-01-07 | SPI Lasers UK Limited | Method of producing an amplifying optical fibre device |
| US7046875B2 (en) | 2003-10-29 | 2006-05-16 | Itf Technologies Optiques Inc. | Optical coupler comprising multimode fibers and method of making the same |
| US7016573B2 (en) * | 2003-11-13 | 2006-03-21 | Imra America, Inc. | Optical fiber pump multiplexer |
| US7580431B2 (en) * | 2004-08-23 | 2009-08-25 | Northrop Grumman Corporation | Method and apparatus for high power amplification in multimode fibers |
| US7492998B2 (en) * | 2004-08-31 | 2009-02-17 | Corning Incorporated | Fiber bundles and methods of making fiber bundles |
| US7289698B2 (en) * | 2004-11-15 | 2007-10-30 | Analog Devices, Inc. | High bitrate transport over multimode fibers |
| US7813603B2 (en) * | 2005-07-08 | 2010-10-12 | Nkt Photonics A/S | Optical coupler devices, methods of their production and use |
| JP5000178B2 (en) * | 2005-08-03 | 2012-08-15 | 株式会社フジクラ | Optical pumping device, optical amplifier, fiber laser |
| WO2007084209A2 (en) * | 2005-11-10 | 2007-07-26 | Optical Air Data Systems, Llc | Single aperture multiple optical waveguide transceiver |
| JP5173137B2 (en) * | 2006-01-27 | 2013-03-27 | 株式会社フジクラ | Double clad fiber, coupling structure, fiber amplifier and fiber laser |
| US8744224B2 (en) * | 2006-03-07 | 2014-06-03 | Alcatel Lucent | Tapered fiber bundle apparatus with monitoring capability |
| US20090202204A1 (en) * | 2006-03-17 | 2009-08-13 | Crystal Fibre A/S | Optical coupler, a method of its fabrication and use |
| US7532792B2 (en) * | 2006-08-28 | 2009-05-12 | Crystal Fibre A/S | Optical coupler, a method of its fabrication and use |
| JP5089950B2 (en) * | 2006-05-30 | 2012-12-05 | 株式会社フジクラ | Multi-port coupler, optical amplifier and fiber laser |
| WO2007148127A2 (en) * | 2006-06-23 | 2007-12-27 | Gsi Group Limited | Fibre laser system |
| GB2439345A (en) * | 2006-06-23 | 2007-12-27 | Gsi Group Ltd | Annular tapered fibre coupler for cladding pumping of an optical fibre |
| GB2444091A (en) * | 2006-11-24 | 2008-05-28 | Gsi Group Ltd | A Laser Amplifier |
| US7450813B2 (en) | 2006-09-20 | 2008-11-11 | Imra America, Inc. | Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers |
| WO2008128359A1 (en) * | 2007-04-18 | 2008-10-30 | Gonthier Francois | Optical fibre amplifier |
| JP2008277582A (en) | 2007-04-27 | 2008-11-13 | Fujikura Ltd | Multicore fiber for optical pumping device, manufacturing method therefor, optical pumping device, fiber laser, and fiber amplifier |
| US20080267560A1 (en) * | 2007-04-30 | 2008-10-30 | Digiovanni David John | Mode-field resizing in optical fibers |
| DE102007036701B4 (en) * | 2007-08-01 | 2010-06-17 | Laserinstitut Mittelsachsen E.V. | Method for producing a fiber laser and fiber laser |
| WO2009077636A1 (en) * | 2007-12-14 | 2009-06-25 | Corelase Oy | Means of coupling light into optical fibers and methods of manufacturing a coupler |
| WO2009077637A1 (en) | 2007-12-14 | 2009-06-25 | Corelase Oy | Method and device relating to optical fibers |
| US7822080B2 (en) * | 2007-12-21 | 2010-10-26 | Coherent, Inc. | High power pulsed fiber laser |
| US7965913B2 (en) * | 2008-04-11 | 2011-06-21 | The Boeing Company | Optical star coupler |
| DE102008020828A1 (en) * | 2008-04-25 | 2009-10-29 | Jt Optical Engine Gmbh + Co. Kg | fiber coupler |
| US9063289B1 (en) | 2008-06-30 | 2015-06-23 | Nlight Photonics Corporation | Multimode fiber combiners |
| US9158070B2 (en) | 2008-08-21 | 2015-10-13 | Nlight Photonics Corporation | Active tapers with reduced nonlinearity |
| US9285541B2 (en) | 2008-08-21 | 2016-03-15 | Nlight Photonics Corporation | UV-green converting fiber laser using active tapers |
| US8873134B2 (en) | 2008-08-21 | 2014-10-28 | Nlight Photonics Corporation | Hybrid laser amplifier system including active taper |
| EP2374034A1 (en) | 2008-12-04 | 2011-10-12 | Imra America, Inc. | Highly rare-earth-doped optical fibers for fiber lasers and amplifiers |
| US9494738B1 (en) | 2009-05-28 | 2016-11-15 | Nlight, Inc. | Single mode fiber combiners |
| US8818151B1 (en) * | 2009-08-03 | 2014-08-26 | United States Of America As Represented By The Secretary Of The Air Force | Fiber Pump Signal Combiner |
| US8184363B2 (en) * | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | All-fiber integrated high power coherent beam combination |
| US8184361B2 (en) * | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | Integrated spectral and all-fiber coherent beam combination |
| US8514485B2 (en) * | 2009-08-07 | 2013-08-20 | Northrop Grumman Systems Corporation | Passive all-fiber integrated high power coherent beam combination |
| US8611003B2 (en) * | 2009-12-08 | 2013-12-17 | Electronics And Telecommunications Research Institute | Double clad fiber laser device |
| JP5643418B2 (en) * | 2010-03-16 | 2014-12-17 | オーエフエス ファイテル，エルエルシー | Multi-core fiber for transmission and amplification, and mechanism for emitting pump light to amplifier core |
| JP5512348B2 (en) * | 2010-03-29 | 2014-06-04 | 株式会社フジクラ | Optical fiber for amplification with optical components, and fiber laser device using the same |
| US8767286B2 (en) * | 2010-04-12 | 2014-07-01 | Lockheed Martin Corporation | Signal and pump mode-field adaptor for double-clad fibers and associated method |
| CN101950050B (en) * | 2010-08-13 | 2011-11-30 | 北京交通大学 | Welding method of optical fibers with mismatched waveguide number |
| CN103477258B (en) | 2011-02-03 | 2016-12-21 | 3Sae科技公司 | Side pumping optical fiber, side pumping methods for optical fiber manufacture and use its Optical devices |
| US9343864B2 (en) * | 2011-02-10 | 2016-05-17 | Soreq Nuclear Research Center | High power planar lasing waveguide |
| US8903211B2 (en) * | 2011-03-16 | 2014-12-02 | Ofs Fitel, Llc | Pump-combining systems and techniques for multicore fiber transmissions |
| FR2974637B1 (en) * | 2011-04-26 | 2013-11-15 | Cnrs Ct Nat De Rech Scient | FIBER OPTIC MONOMODE TRIPLE SHEATH |
| JP5725455B2 (en) * | 2011-06-08 | 2015-05-27 | 国立大学法人 東京大学 | Embedded optical fiber repair method and repair structure of composite structure |
| EP2791719B1 (en) * | 2011-12-13 | 2021-09-22 | OFS Fitel, LLC | Multi-core erbium-doped fiber amplifier |
| US9025239B2 (en) * | 2011-12-13 | 2015-05-05 | Ofs Fitel, Llc | Multi-core erbium-doped fiber amplifier |
| US9097853B2 (en) * | 2012-01-20 | 2015-08-04 | Laser Zentrum Hannover E.V. | Coupling arrangement for non-axial transfer of electromagnetic radiation |
| KR20130104838A (en) | 2012-03-15 | 2013-09-25 | 한국전자통신연구원 | Optic coupler and active optical module using the same |
| US9484706B1 (en) | 2012-06-12 | 2016-11-01 | Nlight, Inc. | Tapered core fiber manufacturing methods |
| JP5990419B2 (en) * | 2012-07-09 | 2016-09-14 | 株式会社フジクラ | Optical input / output device |
| EP2693672A1 (en) * | 2012-07-30 | 2014-02-05 | Xieon Networks S.à.r.l. | Optical network and optical network element |
| US9069141B2 (en) * | 2012-12-10 | 2015-06-30 | Baker Hughes Incorporated | Fiber optic termination arrangement and method of making the same |
| JP5584280B2 (en) * | 2012-12-21 | 2014-09-03 | 株式会社フジクラ | Bridge fiber, combiner and fiber laser device |
| WO2014105756A1 (en) | 2012-12-31 | 2014-07-03 | Nlight Photonics Corporation | Spatially stable high brightness fiber |
| WO2014105757A1 (en) | 2012-12-31 | 2014-07-03 | Nlight Photonics Corporation | All fiber low dynamic pointing high power lma fiber amplifier |
| US8967845B2 (en) * | 2013-01-11 | 2015-03-03 | Corning Incorporated | Light diffusing optical fiber bundles, illumination systems including light diffusing optical fiber bundles, and methods of affixing light diffusing optical fiber bundles to polymer optical fibers |
| GB2510370A (en) * | 2013-01-31 | 2014-08-06 | Gsi Group Ltd | Fibre Optical Laser Combiner |
| JP5814314B2 (en) * | 2013-08-09 | 2015-11-17 | 株式会社フジクラ | Optical combiner, laser device using the same, and optical combiner manufacturing method |
| US9537282B2 (en) * | 2013-09-20 | 2017-01-03 | Alcatel Lucent | System and method for a multi-mode pump in an optical amplifier |
| US10069271B2 (en) * | 2014-06-02 | 2018-09-04 | Nlight, Inc. | Scalable high power fiber laser |
| JP2016020934A (en) * | 2014-07-11 | 2016-02-04 | 株式会社フジクラ | Method of manufacturing optical combiner, optical combiner, and laser device using the same |
| US9664850B2 (en) * | 2014-09-21 | 2017-05-30 | Alcatel-Lucent Usa Inc. | Optical spatial mode-multiplexer |
| JP5908559B1 (en) * | 2014-10-17 | 2016-04-26 | 株式会社フジクラ | Optical coupler, laser device, and tapered fiber |
| GB2540432A (en) | 2015-07-17 | 2017-01-18 | Spi Lasers Uk Ltd | Apparatus for combining optical radiation |
| CN105204119B (en) * | 2015-10-22 | 2018-03-09 | 华中科技大学 | A kind of multicore optical fiber coupler preparation method based on capillary processing |
| EP3978184A1 (en) | 2015-11-23 | 2022-04-06 | NLIGHT, Inc. | Method and apparatus for fine-scale temporal control for laser beam material processing |
| EP3391110B1 (en) | 2015-12-31 | 2019-11-20 | NLIGHT, Inc. | Fiber pump combiner |
| JP6435290B2 (en) * | 2016-06-06 | 2018-12-05 | 株式会社フジクラ | OPTICAL DEVICE, LASER SYSTEM, AND OPTICAL DEVICE MANUFACTURING METHOD |
| US10114172B2 (en) * | 2016-06-20 | 2018-10-30 | Ofs Fitel, Llc | Multimode beam combiner |
| CN106129788A (en) * | 2016-08-31 | 2016-11-16 | 华中科技大学 | A kind of based on multimode fibre watt of level laser fiber beam merging apparatus |
| CN107870394A (en) * | 2016-09-27 | 2018-04-03 | 福州高意光学有限公司 | A kind of optical coupling structure |
| CN109564328A (en) * | 2016-09-29 | 2019-04-02 | 古河电气工业株式会社 | Light connects structure, optical module |
| EP3519871A1 (en) | 2016-09-29 | 2019-08-07 | NLIGHT, Inc. | Adjustable beam characteristics |
| US10730785B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Optical fiber bending mechanisms |
| JP6869298B2 (en) * | 2019-08-09 | 2021-05-12 | 株式会社フジクラ | Optical combiner, laser device, and manufacturing method of optical combiner |
| US11061188B1 (en) * | 2020-03-02 | 2021-07-13 | Ad Value Photonics, Inc. | Fiber coupler and method for fabrication of the same |
| CN113866872A (en) * | 2021-10-12 | 2021-12-31 | 桂林电子科技大学 | Mode controller of multi-core optical fiber to few-mode optical fiber |
| CN114690321B (en) * | 2022-04-02 | 2024-07-05 | 中国人民解放军63892部队 | Multi-core few-mode optical fiber multiplexer based on photon lantern and manufacturing method thereof |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US202547A (en) * | 1878-04-16 | Improvement in machines for making pails from paper-pulp | ||
| US4606020A (en) * | 1984-02-03 | 1986-08-12 | The United States Of America As Represented By The Secretary Of The Army | Efficient design technique for wavelength division multiplexing |
| US4815079A (en) * | 1987-12-17 | 1989-03-21 | Polaroid Corporation | Optical fiber lasers and amplifiers |
| GB8816521D0 (en) * | 1988-07-12 | 1988-08-17 | British Telecomm | Optical star couplers |
| US5809189A (en) * | 1993-08-12 | 1998-09-15 | Virginia Tech Intellectual Properties, Inc. | Controlled dopant diffusion for fiber optic coupler |
| DE69430756T2 (en) * | 1993-11-10 | 2002-10-24 | Adc Australia Pty. Ltd., Symonston | FIBER OPTICAL COUPLER |
| AU697467B2 (en) | 1994-12-28 | 1998-10-08 | Ire-Polus Co. | A coupling arrangement between a multi-mode light source and an optical fiber through an intermediate optical fiber length |
| US5854865A (en) | 1995-12-07 | 1998-12-29 | The United States Of America As Represented By The Secretary Of The Navy | Method and apparatus for side pumping an optical fiber |
| US5864644A (en) | 1997-07-21 | 1999-01-26 | Lucent Technologies Inc. | Tapered fiber bundles for coupling light into and out of cladding-pumped fiber devices |
| EP1060423B1 (en) | 1998-03-04 | 2010-06-02 | JDS Uniphase Corporation | Optical couplers for multimode fibers |
| US6275512B1 (en) | 1998-11-25 | 2001-08-14 | Imra America, Inc. | Mode-locked multimode fiber laser pulse source |
| US6219480B1 (en) * | 1999-01-29 | 2001-04-17 | Fiberstars Incorporated | Optical coupler for coupling light between one and a plurality of light ports |
| US6816652B1 (en) * | 2000-03-20 | 2004-11-09 | Calmar Optcom, Inc. | Pump fiber bundle coupler for double-clad fiber devices |
| US6529657B2 (en) | 2001-02-23 | 2003-03-04 | Keopsys, Inc. | Angle selective side-pumping of fiber amplifiers and lasers |
| US20020172478A1 (en) * | 2001-05-21 | 2002-11-21 | Sahlin Jennifer Joyce | Light transmission techniques |
| US6823117B2 (en) * | 2001-12-07 | 2004-11-23 | Coherent, Inc. | Mode multiplexing optical coupling device |
| FR2834347B1 (en) * | 2002-01-03 | 2004-04-09 | Cit Alcatel | OPTICAL COUPLER FOR MULTIMODE PUMP |
| US6970624B2 (en) * | 2003-06-13 | 2005-11-29 | Furukawa Electric North America | Cladding pumped optical fiber gain devices |
| US7046875B2 (en) * | 2003-10-29 | 2006-05-16 | Itf Technologies Optiques Inc. | Optical coupler comprising multimode fibers and method of making the same |
| US7016573B2 (en) * | 2003-11-13 | 2006-03-21 | Imra America, Inc. | Optical fiber pump multiplexer |
-
2003
- 2003-11-13 US US10/705,817 patent/US7016573B2/en not_active Expired - Fee Related
-
2004
- 2004-11-08 DE DE112004002202.9T patent/DE112004002202B4/en not_active Expired - Fee Related
- 2004-11-08 WO PCT/US2004/035514 patent/WO2005052640A2/en active Application Filing
-
2005
- 2005-11-22 US US11/283,701 patent/US7327920B2/en not_active Expired - Lifetime
-
2008
- 2008-01-22 US US12/017,784 patent/US7742669B2/en not_active Expired - Lifetime
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