Title :
Transient phase conjunction in a two-level system
Author :
Nakano, Hidetoshi ; Sakai, Jun-ichi
Author_Institution :
NTT Basic Res. Lab., Tokyo, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
An analytical expression for conjugate signals is developed for a case where three rectangular pulses with the same center frequency are injected into a two-level system. The Maxwell´s equation is solved with the slowly varying envelope approximation and with the perturbative third-order nonlinear polarization expression of a two-level system. Numerical examples are discussed in such a way that the input pulsewidth is changed relative to the energy relaxation and dephasing times. As the optical pulsewidth becomes short, ripples appear in the signal pulse due to the beat between the optical field and the resonant oscillation of the atomic system
Keywords :
optical phase conjugation; Maxwell equation; analytical expression; atomic system; beat; conjugate signals; dephasing times; energy relaxation; input pulsewidth; optical field; perturbative third-order nonlinear polarization expression; rectangular pulses; resonant oscillation; ripples; slowly varying envelope approximation; transient phase conjugation; two-level system; Atom optics; Nonlinear optics; Optical films; Optical mixing; Optical pulses; Optical pumping; Optical sensors; Pulse shaping methods; Space vector pulse width modulation; Transient response;
Journal_Title :
Quantum Electronics, IEEE Journal of
