Tunable Two-Frequency Lasers for Lifetime Measurements
- Cite this article as:
- Brunel, M., Emile, O., Bretenaker, F. et al. OPT REV (1997) 4: 550. doi:10.1007/s10043-997-0550-y
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We built a compact two-tunable-frequency longitudinally pumped solid-state laser specially designed to measure atomic lifetimes. Weak coupling between the laser eigenstates permits the obtaining of a continuously tunable frequency difference between 0 and 10 GHz. Such a source provides either a linear polarization rotating at such frequencies, or a sinusoidally modulated intensity with a 100% modulation amplitude. As an example, the fluorescence lifetime of the first excited state of Cr4+ in YAG is measured in the zero-fluence limit using a two-frequency Nd:YAG laser at 1064 nm.