Self-Focusing and Solitons in Photorefractive Media

Simple and versatile heterodyne whole-field interferometer for phase optics characterization

“…The lenslike effect is either due to a nonlinear response of the sample, e.g., Kerr lensing 23 or photorefractive lensing, 24 or to local absorption followed by thermal lensing or a mixture of both effects. Thermal lensing is a combination of refractive index change with temperature dn/dT, photoelastic effects and end face bulging due to material expansion.…”

Large quadratic electro-optic effect in K0.99Li0.01Ta0.60Nb0.40O3 single crystal

“…Recent experiments revealed that the built-in compositional disorder of KLTN caused anomalously enhanced quadratic electro-optic response in supercooled samples at the Curie point [11]. And KLTN with room temperature T c is the ideal support for optical spatial solitons, where these can be observed from tens of micrometer widths down to widths of several micrometers [12,13]. In this article, we grow cubic K 0.99 Li 0.01 Ta 0.60 Nb 0.40 O 3 single crystal of which the Curie temperature is close to RT, and investigate its QEO properties.…”

Observation of electro-activated localized structures in broad area VCSELs

“…Recently, Columbo et al [13,14] theoretically investigated the idea of steering localized structures in a VCSEL through soliton electro-activation [15,16]. In fact, spatial solitons in photorefractive crystals [17] can embed inside the electro-optic sample optical waveguides [18] that can be arranged into arrays [19]. When this is achieved inside a paraelectric sample, the waveguides can be switched on and off with nanosecond response times [20], forming a miniaturized array of electro-optic switches [21,22].…”