Role of speckles in the in-line recording and processing of optical signals in photorefractive crystals

A. V. Mamaev, K. Orazov, Vladimir V. Shkunov +1 more

O.S. Filippov, Boris I. Sturman

A. V. Mamaev, Vladimir V. Shkunov

We show theoretically and experimentally that the optimum geometry for phase conjugation of speckle beams in a loop containing a photorefractive crystal is the "biting-its-own-tail" geometry with beam diameter preserved. We predict an increase in the threshold for the process by a factor of 1.5 due to the introduction of speckle in the beam to be conjugated.

Marı́a Aguilar, E Serrano, Vicente López +2 more

Hironori Sasaki, Yoshinao Taketomi, Jian Ma +2 more

We have analyzed the dynamics of the selective erasure process in photorefractive crystal. The selective erasure process is much faster than the incoherent erasure process. Experimental results show good agreement with theoretical prediction. We have applied the incremental recording schedule and selective erasure process to a dynamic photorefractive optical memory and experimentally demonstrated the robust readout and fast update capabilities.

S. Odoulov, M. S. Soskin