Generation of laser-polarized xenon using fiber-coupled laser-diode arrays narrowed with integrated volume holographic gratings.
Volume holographic gratings (VHGs) can be exploited to narrow the spectral output of high-power laser-diode arrays (LDAs) by nearly an order of magnitude, permitting more efficient generation of laser-polarized noble gases for various applications. A approximately 3-fold improvement in (129)Xe nuclear spin polarization, P(Xe), (compared to a conventional LDA) was achieved with the VHG-LDA's center wavelength tuned to a wing of the Rb D(1) line. Additionally, an anomalous dependence of P(Xe) on the xenon density within the OP cell is reported-including high P(Xe) values (>10%) at high xenon partial pressures (approximately 1000 torr).
Nikolaou
Panayiotis
P
Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, IL 62901, USA.
Whiting
Nicholas
N
Eschmann
Neil A
NA
Chaffee
Kathleen E
KE
Goodson
Boyd M
BM
Barlow
Michael J
MJ
D000399:Air Pressure; D006696:Holography / Q000379:methods*; D007834:Lasers; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013113:Spin Labels; D013696:Temperature; D014978:Xenon / Q000737:chemistry*; D014980:Xenon Radioisotopes
D013113:Spin Labels; D014980:Xenon Radioisotopes; D014978:Xenon