N. Sandor, G. Demeter, D. Dzsotjan, G. P. Djotyan
The simultaneous propagation of two frequency-modulated (chirped) laser pulses is considered in an optically thick medium, modeled by an atomic ensemble of lambda-structured atoms. It is shown that there is a matching effect for the Raman-resonant frequency-chirped pulse pair which leads to a quasi-lossless propagation. Furthermore, a well-defined coherent superposition of the atomic ground state is established. This superposition created by the propagating frequency chirped pair can be controlled by the peak amplitudes of the laser pulses. The proposed scheme can be applied to subtantially increase the efficiency of the nonlinear optical wave mixing processes.
View original:
http://arxiv.org/abs/1302.7266
No comments:
Post a Comment