Thermally induced self-focusing and optical beam interactions in planar strontium barium niobate waveguides.
We present an experimental study of thermally induced self-focusing effects and interactions of incoherent light beams in strontium barium niobate waveguides. Depending on the input power, a single parallel beam is strongly focused inside the sample up to diameters of several micrometers. For higher input power we observe the splitting of the beam in a sequence of several spots. We demonstrate that these thermally induced refractive-index patterns can be used to focus and deflect an incoherent guided probe beam in the waveguide with time constants below 1 ms.
Kip
D
D
Krätzig
E
E
Shandarov
V
V
Moretti
P
P