Optical resonance in partially coherent fields

Bhaskar Kanseri, Preeti Sharma, Sakshi Rao

Dana Z. Anderson

A coherent optical memory is described. The device operates on the principle that an optical resonator employing a holographic grating can have user-prescribed eigenmodes. Each information entity (e.g., an image of a cat) defines an eigenmode of the resonator. The stored information is accessed by injecting partial information (e.g., an image of the cat’s ear) into the resonator. A gain medium internal to the resonator amplifies the field belonging to the eigenmode that most resembles the injected field; the other eigenmodes are suppressed through a competition for the gain. A simple optical memory exhibiting associative recall is demonstrated.

Byoung Seung HAM, M. S. Shahriar, M. K. Kim +1 more

We investigate the use of resonant optical Raman pulses to excite and rephase ground state spin coherences via the partial storage or shelving of atoms. Unlike direct-rf-excited spin echoes or off-resonant Raman echoes, the resonant Raman optical field efficiently excites and rephases the spin coherence using \ensuremath{\pi} and 2\ensuremath{\pi} pulses, respectively. In a crystal of ${\mathrm{Pr}}^{3+}$ doped ${\mathrm{Y}}_{2}{\mathrm{SiO}}_{5},$ we experimentally observe spin echo efficiency as high as 46% of the free induction decay signal.

Sergiy I. Zub, A. S. Kleiman

Laleh Mokhtarpour, Gazi Habiba Akter, Sergey A. Ponomarenko

We theoretically describe several classes of ultrashort partially coherent pulses that maintain their shape on propagation in coherent linear absorbers near optical resonance.

E. V. Baklanov