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Generation Of Laser-Polarized Xenon Using Fiber-Coupled Laser-Diode Arrays Narrowed With Integrated Volume Holographic Gratings, Panayiotis Nikolaou, Nicholas Whiting, Neil A. Eschmann, Kathleen E. Chaffee, Michael J. Barlow, Boyd M. Goodson
Generation Of Laser-Polarized Xenon Using Fiber-Coupled Laser-Diode Arrays Narrowed With Integrated Volume Holographic Gratings, Panayiotis Nikolaou, Nicholas Whiting, Neil A. Eschmann, Kathleen E. Chaffee, Michael J. Barlow, Boyd M. Goodson
Nicholas Whiting
Volume holographic gratings (VHGs) can be exploited to narrow the spectral output of high-power laserdiode arrays (LDAs) by nearly an order of magnitude, permitting more efficient generation of laser-polarized noble gases for various applications. A ~3-fold improvement in 129Xe nuclear spin polarization, PXe, (compared to a conventional LDA) was achieved with the VHG-LDA’s center wavelength tuned to a wing of the Rb D1 line. Additionally, an anomalous dependence of PXe on the xenon density within the OP cell is reported—including high PXe values (>10%) at high xenon partial pressures (~1000 torr).