A broadband Ytterbium-doped tunable fiber laser for 3He optical pumping at 1083 nm

Autor: Sébastien Grot, Sylvain Bordais, Pierre-Jean Nacher, Geneviève Tastevin, Emmanuel Courtade
Přispěvatelé: Laboratoire Kastler Brossel (LKB (Lhomond)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Keopsys, Département R&D (Keopsys, Département R&D), Keopsys, Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2004
Předmět:
Ytterbium
Physics and Astronomy (miscellaneous)
Atomic Physics (physics.atom-ph)
pompage optique
General Physics and Astronomy
chemistry.chemical_element
FOS: Physical sciences
Physics::Optics
ytterbium laser
01 natural sciences
polarized helium
law.invention
Physics - Atomic Physics
Optical pumping
metastable helium
Fiber Bragg grating
law
Fiber laser
0103 physical sciences
Broadband
42.60.-v
42.55.Wd
32.80.Bx
Physics::Atomic Physics
010306 general physics
hélium métastable
optical pumping
010302 applied physics
Physics
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]
Multi-mode optical fiber
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]
business.industry
helium 3
1083 nm
Amplifier
General Engineering
ytterbium
Laser
chemistry
Optoelectronics
Atomic physics
hélium hyperpolarisé
business
laser fibre
Physics - Optics
Optics (physics.optics)
Zdroj: Applied Physics B-Laser and Optics
Applied Physics B-Laser and Optics, Springer Verlag, 2004, 78 (2), pp.145-156
Applied Physics B-Laser and Optics, 2004, 78 (2), pp.145-156
ISSN: 0946-2171
Popis: Large amounts of hyperpolarized 3He gas with high nuclear polarization rates are required for use in neutron spin filters or nuclear magnetic resonance imaging of human lung. Very high efficiency can be obtained by metastability exchange optical pumping using multimode lasers to excite the 23S-23P transition at 1083 nm. Broadband Ytterbium-doped tunable fiber lasers have been designed for that particular application. Different options for the architecture of the fiber oscillator are presented and compared. Emphasis is given to a linear cavity configuration that includes a high reflectivity fiber mirror and a low reflectivity tunable fiber Bragg grating. Optical measurements are performed to finely characterize the spectral behavior of the lasers. Atomic response is also quantitatively probed to assess the optimal design of the oscillator for optical pumping. Multimode operation matching the 2 GHz Doppler-broadened helium resonance line and tunability over more than 200 GHz are demonstrated. Boosting the output of this fiber laser with a Yb-doped fiber power amplifier, all-fiber devices are built to provide robust, high power turn-key sources at 1083 nm for improved production of laser polarized 3He.
Comment: Submitted July 2003, published online December 2003 (http://www.springerlink.com). V3 symbols corrected in Figs 10-11; minor final changes included
Databáze: OpenAIRE
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