Raman scattering via quantum optics

Chun-Hua Yuan, L. Q. Chen, Z. Y. Ou +1 more

We theoretically present a new method to enhance Raman scattering by injecting seeded light field that is entangled with the initially prepared atomic spin wave. From theoretical analysis and numerical calculation, we find that strong Raman scattering can be obtained. Different from other enhancement mechanisms, the entanglement enhanced Raman scattering is phase sensitive. Such an enhancement method in Raman scattering may have practical applications in quantum information, nonlinear optics and optical metrology due to its simplicity.

Milan Pospíchal, Jan Peřina

Chun-Hua Yuan, L. Q. Chen, Z. Y. Ou +1 more

We theoretically propose a method to enhance Raman scattering by injecting a seeded light field which is correlated with the initially prepared atomic spin wave. Such a light-atom correlation leads to an interference in the Raman scattering. The interference is sensitive to the relative phase between the seeded light field and initially prepared atomic spin wave. For constructive interference, the Raman scattering is greatly enhanced. Such an enhanced Raman scattering may find applications in quantum information, nonlinear optics, and optical metrology due to its simplicity.

K. F. Reim, Philip J. Bustard, K. C. Lee +8 more

Alexander A. Lisyansky, E. S. Andrianov, Alexey P. Vinogradov +1 more

Mikhail P. Petrov, Vladimir I. Belotitskii, Evgeny A. Kuzin +1 more

The feasibility of constructing an all-optical dynamic memory based on stimulated Raman scattering (SRS) in a fibre waveguide is discussed. A possible use of an SRS inverter for regeneration of optical signals is considered. Theoretical and experimental investigations are reported of the functional properties of an SRS inverter. The construction and investigation of a prototype all-optical fibre memory with an SRS inverter are described. The repetition frequency of the optical pulses along a fibre loop is 100 MHz and the loop capacity is 500 bits. Pulse circulation is reported over a period of 10 min at an average pump power of 2 W. The response time and the energy requirements of devices with an SRS inverter, and ways of improving their characteristics are considered.