TY - JOUR AU - J. Bergquist AU - S. Lee AU - John Hall BT - Physical Review Letters DA - Jan-01-1977 DO - 10.1103/PhysRevLett.38.159 PY - 1977 SP - 159 EP - 162 T2 - Physical Review Letters TI - Saturated Absorption with Spatially Separated Laser Fields: Observation of Optical "Ramsey" Fringes VL - 38 SN - 0031-9007 ER -