Photoinduced light scattering (PILS) in nominally undoped ${\text{LiNbO}}_3$ with the mixed photovoltaic and diffusion charge transports is studied theoretically and experimentally. All parameters describing the holographic behavior of ${\text{LiNbO}}_3$ are received from the angular distribution of the scattering intensity: gain factor $\Gamma$, diffusion field $E_D$, photovoltaic field $E_{pv}$, and frequency detuning $\Omega {\tau }_{\text{di}}$. The technical advantage of this PILS method is the low requirement of mechanical stability.

• Received 9 April 2008

DOI:https://doi.org/10.1103/PhysRevB.77.235110