论文信息 - Multiwave mixing and spatial solitons in photorefractive Bi12TiO20 crystals

Multiwave mixing and spatial solitons in photorefractive Bi12TiO20 crystals

The energy efficiency of multiwave mixing and geometrical parameters of spatial solitons in photorefractive Bi12TiO20 crystals in conditions of pulsed and continuous-wave laser excitation have been studied experimentally. It has been found that with the use of 532 nm-wavelength laser pulses switching of the photorefractive nonlinearity mechanism requires a time interval in excess of 20 - 50 ns. And saturation is observed when the duration is over 100 ns. The formation dynamics of spatial solitons in photorefractive Bi12TiO20 crystals has been analyzed using radiation of a continuous-wave He-Ne laser. It has been determined that the formation conditions and dynamics are influenced by a number of factors including the radiation input geometry of a crystal, power of the light beam, orientation of its polarization relative to the crystal axes, applied electric field and its direction.

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