Abstract
We demonstrate a scheme to use a Littman configuration external cavity diode
laser (ECDL) as a stable-frequency light source to stabilize two cw single-mode
Ti:sapphire lasers for laser cooling of magnesium fluoride molecules. An ECDL based on
the Littman configuration is constructed and stabilized by a digital signal processor
system. We stabilize the frequency of our ECDL to ±0.77 MHz precision over 10 h and the
Allan standard deviation reaches 2.6×10−11 at an integration time of 10 s. We
lock two Ti:sapphire lasers through a transfer cavity, and either laser has a long-term
frequency stability of ±2.5 MHz.
© 2016 Chinese Laser Press
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