Optogalvanic Lamb-dip frequency stabilization of a sequence-band CO(2) laser.

@article{Shy1987OptogalvanicLF,
  title={Optogalvanic Lamb-dip frequency stabilization of a sequence-band CO(2) laser.},
  author={J T Shy and Tzu Chen Yen},
  journal={Optics letters},
  year={1987},
  volume={12 5},
  pages={325-7}
}
The Lamb dip at the center of sequence-band CO(2) laser transitions is detected optogalvanically by using a low-pressure N(2)-CO(2) discharge. The first derivative of this signal is used to frequency stabilize a sequence-band CO(2) laser to a stability of better than 2 x 10(-9).