Optical pumping of high-density Rb with a broadband dye laser and GaAlAs diode laser arrays: Application to He3 polarization

M. E. Wagshul, T. E. Chupp

Research output: Contribution to journalArticle

65 Scopus citations


We have studied laser optical pumping of Rb at densities up to 4×1014 atoms/cm3 and produced polarized He3 by spin exchange with Rb. Numerical calculations show that for a high-density Rb vapor GaAlAs diode laser arrays can provide results similar to those obtained with a broadband Kr+-ion dye-laser system. We have confirmed these calculations with measurements using a 40-GHz full width at half maximum bandwidth dye laser and 100- and 500-mW GaAlAs diode laser arrays (Spectra Diode Labs Array Nos. SDL-2410C and SDL-2450C). We have optically pumped Rb of density [Rb]=4×1014 atoms/cm3, and we have measured up to 70% He3 polarization in a 4-cm3 volume with 600 mW from the dye laser. With the diode laser arrays, we have pumped with 30 and 300 mW with results comparable to those obtained with the dye laser. With a 1-W diode laser array, we anticipate 70-80 % He3 polarization in a 4-cm3 volume.

Original languageEnglish (US)
Pages (from-to)4447-4454
Number of pages8
JournalPhysical Review A
Issue number8
Publication statusPublished - Jan 1 1989
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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