Optical phase conjugation via stimulated Brillouin scattering in carbon disulfide.

E. L. Bubis, Michail V Vasil'ev, Aleksey A. Leshchev +3 more

Y. Ben-Aryeh, Aharon Postan

Vladimir I. Odintsov, А. Н. Пономарев, Е. Ю. Соколова

Y. Ben-Aryeh, Aharon Postan

Mark D. Skeldon, Paul Narum, Robert W. Boyd

The results of an experimental investigation of a new geometry for producing phase conjugation by Brillouin-enhanced four-wave mixing are presented. In this geometry, the four-wave mixing medium is carbon disulfide, and the backward-going pump wave is created from the transmitted forward-going pump wave by stimulated Brillouin scattering (SBS) in glycerol. The two pump waves are hence phase conjugates of each other, and the quality of the phase-conjugation process is not degraded even by the use of an aberrated pump wave. The probe wave is created by SBS in carbon disulfide, which has a Brillouin frequency half that of glycerol, and the conjugate wave is therefore generated at the same frequency as the probe. Since the pump and signal waves differ in frequency by the Brillouin frequency of the carbon disulfide four-wave mixing medium, high reflectivities (approximately 2000%) are obtained as a result of Brillouin resonance enhancement.

Qihuang Gong, Zongju Xia, Jia-Sun Yang

We have prepared several phase plates to observe phase conjugation by stimulated Brillouin scattering in carbon disulfide in the usual way. One of the plates was specially made, lightly ground by fine emery. Its spatial Fourier spectrum shows a very bright spot in the center of the speckle pattern, which means that the light beam that passed through this plate consisted of a strong plane wave component and many weak random components. This is different from the phase plate in phase conjugation by stimulated Brillouin scattering given in earlier papers,1 but, using only this special plate, we have successfully obtained phase conjugation.