We demonstrate a unique atomic interferometer employing collective radiation from the atoms to measure the atomic phase. Atomic coherence is detected by interference of a continuous free-induction decay field and a continuous photon-echo field that originate in spatially separated regions of an atomic beam. Using this system, we measure the 180° phase shift of a J = 0 atomic state that undergoes a 2π-rotation of the Bloch vector or a two-level optical transition.
© 1995 Optical Society of America
Original Manuscript: August 4, 1994
Published: February 15, 1995
C. Schnurr, T. Savard, L. J. Wang, and J. E. Thomas, "Detection of atomic interference through collective radiation," Opt. Lett. 20, 413-415 (1995)