DocumentCode :
2926660
Title :
Frequency-narrowed tunable external-cavity 2.5-W diode laser for spin-exchange optical pumping
Author :
Nelson, J. ; Chann, B. ; Walker, T.G.
Author_Institution :
Dept. of Phys., Wisconsin Univ., Madison, WI, USA
fYear :
2000
fDate :
7-12 May 2000
Firstpage :
426
Abstract :
Summary form only given. Liter quantities of spin-polarized /sup 129/Xe are of utility for a number of applications, including MRI. The hyperpolarized /sup 129/Xe is produced via spin-exchange collisions with laser-polarized Rb atoms. Commercially available diode arrays, while compact and inexpensive, have bandwidths of typically 2-3 nm, far in excess of the 0.1-0.3 nm pressure-broadened Rb absorption linewidth. Recently, Levron et al. (see Appl. Phys. Lett. vol. 73, p. 2666, 1998), frequency narrowed a custom 1-W diode to use for spin-exchange optical pumping of Xe using Cs instead of Rb. The resulting 0.3-W output with 0.12-nm bandwidth gave Xe polarizations of 2.5%. Here we achieve nearly a factor of 10 increase in power at the same linewidth using commercial broad area diode lasers (BALs) with external-cavity feedback.
Keywords :
atom-atom collisions; laser beam effects; laser cavity resonators; laser feedback; laser tuning; optical pumping; rubidium; semiconductor lasers; spin; 0.3 W; 2.5 W; Cs; MRI; Rb; Xe; Xe polarizations; commercial broadarea diode lasers; external-cavity feedback; frequency narrowed; frequency-narrowed tunable external-cavity 2.5-W diode laser; hyperpolarized /sup 129/Xe; laser-polarized Rb atoms; pressure-broadened Rb absorption linewidth; spin-exchange collisions; spin-exchange optical pumping; spin-polarized /sup 129/Xe; Absorption; Atom lasers; Atomic beams; Bandwidth; Diode lasers; Frequency; Magnetic resonance imaging; Optical pumping; Semiconductor laser arrays; Tunable circuits and devices;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
Type :
conf
DOI :
10.1109/CLEO.2000.907204
Filename :
907204
Link To Document :
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