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(12) United States Patent ao) Patent No.: Us 7,599,404 B2
Salin et al. (45) Date of Patent: Oct. 6,2009
(54) COMPOSITE OPTIC FIBRE FOR LASER WITH PUMP AND LASER WAVE CONFINEMENT, APPLICATIONS TO LASERS
(75) Inventors: Francois Salin, Gradignan (FR); Jens Limpert, Talence (FR)
(73) Assignees: Centre National de la Recherche
Scientiflque, Paris (FR); Universite de
Bordeaux 1, Talence (FR)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl.No.: 11/188,726
(22) Filed: Jul. 26, 2005
(65) Prior Publication Data
US 2006/0176911 Al Aug. 10, 2006
(30) Foreign Application Priority Data
Feb. 4, 2005 (FR) 05 50344
(51) Int. CI.
H01S 3/30 (2006.01)
(52) U.S. CI 372/6; 372/39; 372/70;
372/109; 359/341.1; 359/341.3; 359/341.5;
(58) Field of Classification Search 372/6,
372/39, 70, 109; 359/341.1, 341.3, 341.5,
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
2002/0172486 Al* 11/2002 Fermann 385/128
2005/0082470 Al * 4/2005 Dziekanetal 250/281
2005/0259942 Al * 11/2005 Temelkuran et al 385/147
Definition of rigid, as provided on www.dictionary.com noting that "rigid" is an adjective having a meaning including "hard."* J. Limpert et al., "Low-nonlinearity single-transverse-mode ytterbium-doped photonic crystal fiber amplifier", Optics Express Opt. Soc. America USA, vol. 12, No. 7, Apr. 5,2004, XP-002346902.
Primary Examiner—Wael Fahmy
Assistant Examiner—Hrayr A Sayadian
(74) Attorney, Agent, or Firm—Young & Thompson
A composite optic fibre for laser includes a core surrounded with a pump guiding sheath in contact with the core, sheath being a photonic structure formed by a substantially regular matrix assembly of coaxial capillaries, spaced apart and arranged parallel to the core, the core being a material with doping elements which may be brought into at least one excited electronic state by absorbing the energy from a pump optical signal of a first determined wavelength running through the core and capable of giving-back the former by de-energization in the form of an optical signal of a second determined wavelength, the core having a determined diameter and the sheath having a determined diameter. The diameter of the guiding sheath is greater than the core diameter and smaller than or equal to four times the core diameter, the core diameter being greater than or equal to 35 micrometers.
18 Claims, 4 Drawing Sheets
A. Liem et al., "Air-clad large-mode-area photonic crystal fibers:
power scaling concepts up to the multi kW-range", Proceedings of the
SPIE—The International Society for Optical Engineering SPIE, vol.
5335, No. 1, 2004, pp. 158-169, XP-002346903.
T. Schreiber et al., "High-power air-clad large-mode-area photonic
crystal fiber laser", Lasers and Electro-Optics, 2003, IEEE, p. 656,
J. Limpert et al., "High performance ultrafast fiber laser systems", Proceedings of the SPIE—Lhe International Society for Optical Engineering SPIE, vol. 5335, No. 1, 2004, pp. 245-252, XP-002346904.
L. Schreiber et al., "High Power Photonic Crystal Fiber Laser Systems", Transparent Optical Networks, 2004, Proceedings of 2004 6th International Conference on Warsaw, Poland, vol. 1, pp. 131-135, XP-010743461.
* cited by examiner