Abstract
Polarization spectroscopy of an Fe-Ar hollow cathode discharge cell was used to lock a frequency-doubled Ti:sapphire laser to the 372-nm5 D 4→5 F 5 transition of 56Fe. The discharge cell produced a density of 1018 m-3 ground-state 56Fe atoms at a temperature of 650 K, this density being comparable to a conventional oven at 1500 K. Saturated absorption spectroscopy and two schemes of polarization spectroscopy were compared with respect to signal-to-background ratio and the effect of velocity-changing collisions. The laser was locked within 0.2 MHz for hours by feedback of the dispersive polarization spectroscopy signal.
| Original language | English |
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| Pages (from-to) | 815-819 |
| Journal | Applied physics. B, lasers and optics |
| Volume | 76 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Jul 2003 |