M.A. Noginov, G.B. Loutts, et al.
Applied Optics
Homogeneous optical linewidths as small as 760 Hz (fwhm) have been observed in Y2O3+ using delayed heterodyne photon echoes. Hyperfine and lifetime contributions to dephasing are estimated to contribute {slanted equal to or less-than} 300 Hz to this width, and the remainder is attributed to quasi-resonant energy transfer. © 1981.
M.A. Noginov, G.B. Loutts, et al.
Applied Optics
D.P. Burum, R.M. Macfarlane, et al.
Physics Letters A
G.W. Burr, H. Coufal, et al.
SPIE Optical Science and Technology 2000
M. Levenson, R.M. Shelby, et al.
Physical Review Letters