Laser frequency stabilizations using electromagnetically induced transparency

Han Seb Moon, J. Q.; Lim Lee, J. Q.; Kim, Kyoungdae; Jung Bog Kim
April 2004
Applied Physics Letters;4/19/2004, Vol. 84 Issue 16, p3001
Academic Journal
We present two techniques to lock a laser frequency on an atomic transition line by using an electromagnetically induced transparency (EIT) signals, which give optical and electric feedback. We employed these methods to the D2 line of 87Rb atoms. Spectral characteristics of subnatural linewidth EIT allow us to improve frequency stability. By optical feedback of EIT signals, we were able to obtain locking bandwidths of 12 MHz, while frequency stability was 5×10-13 at best after 100 s of integration using a frequency modulation technique. © 2004 American Institute of Physics.


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