Abstract
We have investigated the optogalvanic effect (OGE) in the external cavity OG cell as a function of CO2 gas pressure, discharge current and chopping frequency. Usefulness of these investigations with regards to optogalvanic frequency stabilization of CO2 lasers has been discussed. In particular, we find that operation of the OG cell at low pressure (∼2.5 Torr) in conjunction with high (∼800 Hz) modulation offers the best condition for stabilization.
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